CHANGELOG.md

Changelog

All notable changes to this project will be documented in this file.

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

[Unreleased]

Added

• Added enum_format configuration option to control enum value identifier formatting. Options: "title_case" (default, e.g., InProgress) or "screaming_snake_case" (e.g., IN_PROGRESS).
• Added Unqualified() method to generated column structures that returns columns without table alias/prefix. (thanks @atzedus)
• Added PreloadCount and ThenLoadCount to generate code for preloading and then loading counts for relationships. (thanks @jacobmolby)
• MySQL support for insert queries executing loaders (e.g., InsertThenLoad, InsertThenLoadCount). (thanks @jacobmolby)
• Added overwritable hooks that are run before the exec or scanning test of generated queries. This allows seeding data before the test runs.
• Added bob.Each function to iterate over query results (range-over-func). (thanks @toqueteos)
• Added support for the VALUES statement in MySQL, PostgreSQL, and SQLite. (thanks @manhrev)
• Added MariaDB compatibility check in gen/bobgen-mysql (thanks @dumdev25)
• Added ALL, SOME, ANY expressions for MySQL and PostgreSQL dialects. Added EXISTS expression for all dialects. (thanks @manhrev)

Fixed

• Fix collisions for preloader alias generation. Replaced RandInt with NextUniqueInt (thanks @atzedus)
• Fix an issue where the random function of aliased custom types were not being used in generated query tests.
• Properly recognize placeholders in LIMIT and OFFSET when generating queries for PostgreSQL.
• Throw an error on an empty SET clause during SQL generation rather than sending invalid syntax to database. (thanks @Xaeroxe)
• Fix MySQL Insert().One()/All()/Cursor() using SELECT * instead of explicit model columns when re-fetching inserted rows, consistent with PostgreSQL/SQLite RETURNING. (thanks @tak848)

[v0.42.0] - 2025-11-25

Fixed

• Fixed a bug where the generated loaders for many-to-many relationships were skipping related rows. (thanks @TylerJGabb)

Added

• Include shell.nix for developers using Nix to create development environments. (thanks @EliRibble)
• Additional README content on how developers can use linting and unit testing to contribute. (thanks @EliRibble)
• Added Plus expression chain method (thanks @atzedus).

Changed

• Export orm.NullTypeConverter. (thanks @Serjlee)
• Uses io.StringWriter instead of io.Writer for efficiency since we are always writing strings.

[v0.41.1] - 2025-09-02

Fixed

• Properly handle code generation tests for compound queries in MySQL.

[v0.41.0] - 2025-09-02

Added

• drivers/pgx.Pool now includes the methods Acquire and AcquireFunc which mirror the methods in pgx/v5/pgxpool to acquire a connection from the pool (thanks @Eyal-Shalev).
• Added the drivers/pgx.PoolConn type which is a wrapper around pgx/v5/pgxpool.Conn.

Changed

• Use the full column type and not just the datatype as the DBType in bobgen-mysql.
• bob.Transactor is now a generic interface so that implementations can use a concrete transaction type.
• The data types generated for SQLite now follow SQLite's type affinity rules more closely (excluding some common names). As a result, all integer types are now mapped to int64 and all floating point types are mapped to float64.

Fixed

• Fixed an issue where bobgen-mysql could not detect unsigned integer columns in queries.
• Properly close pgx transactions if the context used in BeginTx is cancelled.
• Fix issues with generating code for relationships defined with WhereExpr.
• Support uint64 type when scanning columns as types.Uint64. This fixes scanning BIGINT UNSIGNED MySQL columns as types.Uint64 when interpolateParams is enabled. (thanks @luiscleto)
• Properly handle code generation tests for compound queries in MySQL.
• Fix an issue where some ids are uppercased by the MySQL query code generator.

[v0.40.2] - 2025-08-16

Fixed

• Fixed Scanner/Valuer test gen for types defined in the models package.
• Fix issue with randomization test when enum is only used in an array.
• Fix issue with using CompareExpr with values that are null.
• Fix issue with imports in query tests.
• Fix issue with detecting the columns in a CTE in bobgen-psql.
• Properly detect the end of a function call in postgres qury parser.

[v0.40.1] - 2025-08-14

Fixed

• Fixed bug in preloading

[v0.40.0] - 2025-08-13

Added

• Made code generation modular by relying on built-in plugins that can be enabled or disabled in the configuration.
  • dbinfo: Generates code for information about each database. Schemas, tables, columns, indexes, primary keys, foreign keys, unique constraints, and check constraints.
  • enums: Generates code for enums in a separate package, if there are any present.
  • models: Generates code for models. Depends on enums.
  • factory: Generates code for factories. Depends on models.
  • dberrors: Generates code for unique constraint errors. Depends on models.
  • where: Generates type-safe code for WHERE clauses in queries. Depends on models.
  • loaders: Adds templates to the models package to generate code for loaders e.g models.SelectThenLoad.Table.Rel().
  • joins: Adds templates to the models package to generate code for joins e.g models.SelectJoin.Table.LeftJoin.Rel.
  • queries: Generates code for queries.
• Added new types.Uint64 type that sends values to the database as strings. This is necessary because using uint64 directly can cause an overflow if the value exceeds the maximum value of an int64. This is a limitation imposed by database/sql/driver.Valuer interface.
• Added support for pgvector types during code generation.
  • pgvector.Vector
  • pgvector.HalfVector
  • pgvector.SparseVector

Changed

• Enums are now imported directly from a new generated enums package. This makes it easier to use enums in other packages without having to depend on the models package.
• Preload functions now take a custom orm.PreloadRel struct instead of reusing orm.Relationship.
• By default, factories are now generated in ./factory instead of ./models/factory.
• Outputs are now determined by plugins which can be enabled or disabled in the configuration.
• UniqueConstraintErrors are now generated in a separate dberrors package instead of being generated in the models package.
• Tests in the generated models package are no longer generated in a separate models_test package. There is no longer any circular dependency since tests for the unique constraint errors are generated in the dberrors package.
• orm.Columns has been moved to expr.ColumnsExpr.
• orm.NewColumns has been moved to expr.NewColumnsExpr.
• <Table>.Columns() is removed. The columns expression is now expected to be embedded in the Columns field of the <Table> struct.
• <dialect>.View and <dialect>.Table now take an additional type parameter for the columns type. This is assigned to the Columns field with NewView/NewTable functions.

Removed

• Removed the no_factory configuration option. It is now replaced with the factory plugin which can be enabled or disabled. See https://bob.stephenafamo.com/docs/code-generation/configuration#plugins-configuration for more details.
• Removed the Only and Except exported functions in orm. They are now in the private internal package.
• Removed the generated models.<Model>Columns global variable. It can now be accessed through models.<Table>.Columns.
• Removed the generated models.TableNames and models.ColumnNames global variables. Their use can be replaced with the dbinfo plugin which generates a dbinfo package with all the information about the database.

Fixed

• Fixed issue with redundant title casing column names in query templates. (thanks @luiscleto)
• Fix invalid expression with pointer-based type systems. (thanks @tak848)
• Fix panic when parsing SQLite UPDATE queries that do not contain a FROM clause.
• Fix issue when using enums in generated queries.
• Fix randomization of floats and decimals in the factory.
• Fix JSON data being incorrectly hex-encoded as bytea when using pgx through simple protocol, causing PostgreSQL to reject it with invalid input syntax errors. (by @Maxitosh)
• Fix issue with preload queries not using a defined schema on the related tables

[v0.39.0] - 2025-07-28

Added

• Added the As method to clause.TableRef, which sets the alias and return a copy of the struct. (thanks @Nitjsefni7)
• Added the type_system configuration option to determine how to generate null and optional values in the generated code. Possible options: github.com/aarondl/opt, github.com/aarondl/opt/null or database/sql. The default value is github.com/aarondl/opt.
• When generating code for queries, The All method of the generated query will return a struct with nested fields instead of a flat struct.
  • columns with dots (.) are assumed to be a to-many nested field.
  • columns with double underscores (__) are assumed to be a to-one nested field.
• Implement --prefix annotation in queries for bobgen-psql.
• Add FromExistingRel method to factories to create a template from an existing model. (thanks @dutow)
• Add WithExistingRel to factory mods to attach an existing model as a relationship. (thanks @dutow)
• Added support in psql for combined args (order by, limit etc.) in combined queries and use parens if they are present. (@iwyrkore)
• Added parens for combined queries. (@iwyrkore)
• Match columns using regular expressions in type replacements. This is useful for e.g. matching columns that have a common prefix or suffix. (thanks @abdusco)

Changed

• Mod is now a separate field in orm.ModQuery and orm.ModExecQuery.
• Allx now takes a Transformer type parameter to transform the result of the query.
• Updated documentation for readability, added code gen examples. (thanks @singhsays)
• Columns are now matched in a case-insensitive manner in type replacements. (thanks @abdusco)
• Columns can now be matched with as many conditions as needed in type replacements. This removes the previous requirement that boolean fields had to be specified in addition to a string field. (thanks @abdusco)
• Factories now expose a NewXWithContext that accepts a context in addition to NewX that does not. This provides a cleaner API for the callers, while still allowing the use of context internally. (thanks @abdusco)

Removed

• Removed the fallback_null configuration option. It is now replaced with the type_system configuration option.

Fixed

• Fixed some issues with creating relationships in the factory by avoiding trying to reuse models.
• Fix issues with generating code for queries with duplicate return column names.
• Updated gen table detail queries to use context. (thanks @singhsays)
• Properly detect bool, timestamp and timestamptz types in bobgen-psql.
• Fix transformer for single result queries.
• Properly handle indexes where the sorting order can be null.
• Check for nullability when loading relationships.
• Handle table names quoted with backticks in mysql query parser. (thanks @luiscleto)
• Allow matching columns in type replacements by the autoincr property as stated in the docs. (thanks @abdusco)
• Handle dashes and spaces in generated enum values properly (thanks @abdusco)
• Check for nullability when loading relationships from Slices (thanks @felipeparaujo)

[v0.38.0] - 2025-06-04

Added

• Added the fallback_null top level configuraiton option. Which can be either database/sql or github.com/aarondl/opt/null.
  This is used to determine how to create null values in the generated code. If set to database/sql, it will use sql.Null[T] for nullable types, and if set to github.com/aarondl/opt/null, it will use opt.null.Val[T].
  The default value is database/sql.

Fixed

• Correctly build models with nested relationships in the factory.
• Fix a performance issue with code generation in bobgen-psql.
• Use the correct alias when generating table columns.
• Fix issue with generating factory code for tables with schema names.

[v0.37.0] - 2025-05-31

Added

• Added the drivers/pgx package which contains types and functions to use a pgx/v5 connection as a bob.Executor.
• Added support for github.com/ncruces/go-sqlite3. (thanks @ncruces)
• Added support for configuring what type to generate specific null versions of a type instead of always wrapping with sql.Null[T].

Changed

• The bob.Transaction interface now takes a context.Context argument in the Commit and Rollback methods.
• The method BeginTx on the bob.Transaction interface is now changed to Begin and it takes a single context argument.
  This is to make it easier to implement for non database/sql drivers.
• In the generated model, the PrimaryKeyVals() method is now private.
• Renamed driver_name to driver in code generation configuration.
• In type replacements, nullability is not used in matching. Previously, nullability of matches was set to false by default, and would require an additional replacement to also match nullable columns.

Removed

• Removed the New and NewQueryer functions. Any of bob.NewDB, bob.NewTx or bob.NewConn can be used instead.
• Removed the StdInterface interface as it is unnecessary.
• Remove redundant orm.Model interface.
• Remove dependence on github.com/aarondl/opt in generated code.
  • Nullable values are now wrapped database/sql.Null with instead of github.com/aarondl/opt/null.Val.
  • Optional values are now represented as pointers instead of github.com/aarondl/opt/omit.Val[T].
• Removed in_generated_package type configuration option. This was limited and could only indicate that the type is in the models package. Instead the full import path can now be used in the imports configuration option, and if it is in the same package as the generated code, the prefix will be automatically removed.

Fixed

• Properly handle nil args when checking if default or null in mysql table insert query.
• Fix bug in querying slice relationships in MySQL and SQLite.

[v0.36.1] - 2025-05-27

Fixed

• Fixed issue with generating correct test code for nullable args in SQL queries.
• Fix issue where writing the "NO EDIT Disclaimer" at the top of Go generated files was skipped.

[v0.36.0] - 2025-05-27

Changed

• Loaders are now generated as singular instead of plural. This feels more natural when using them in code.

  // Before
  models.Preload.Users.Pilots()
  models.SelectThenLoad.Users.Pilots()
  
  // After
  models.Preload.User.Pilots()
  models.SelectThenLoad.User.Pilot()

[v0.35.1] - 2025-05-27

Fixed

• Store types.Time as an RFC3339 string in the DB

[v0.35.0] - 2025-05-26

Added

• Added support to generate code for SELECT, INSERT, UPDATE and DELETE queries in bobgen-mysql.
• Added support to generate code for INSERT, UPDATE and DELETE queries in bobgen-sqlite.
• Added LIMIT and OFFSET to the SQLite Update and Delete queries.
• Added IndexedBy and NotIndexed mods to the SQLite Delete queries.
• Added the Transactor and Transaction interfaces.
• Added the SeparatePackageForTests attribute to generation outputs to indicate if generated tests should have their own package.
• Added the RandomColumnNotNull mod to factories to generate random values for non-nullable columns without the chance of being null.
• Added the WithOneRelations mod to factories to include every relation for a factory template.
• Added clause.TableRef which merges clause.Table and clause.From since they had overlapping functionality.
• Added RunInTx method to bob.DB. This starts a transaction and calls the given function with this transaction.
• Add support for MySQL to bobgen-sql.
• Added Exec test for generated queries that do not return rows.
• Added OrderCombined, LimitCombined, OffsetCombined mods to MySQL SELECT queries. These are applied to the result of a UNION, INTERSECT or EXCEPT query.
• Added type_limits property to column definitions.
• Added limits option to random_expr function for types. This is to pass any column limits to the randomization function (e.g. max_length for strings).
• Added tests to check that the generated factory can create models and save into the database.
• Added the pgtypes.Snapshot type for the pg_snapshot and txid_snapshot type in PostgreSQL.
• Added a custom Time type to the types package. This is motivated by the fact that the libsql driver does not support the time.Time type properly.
• Added an option to disable aliasing when expressing expr.Columns. Also added EnableAlias and DisableAlias methods to expr.Columns to control this behavior.
• Added a PrimaryKey method to {dialect}.Table to get the primary key columns of the table.

Changed

• Changed the INDEXED BY and NOT INDEXED mods for SQLite update queries from TableIndexedBy and TableNotIndexed to IndexedBy and NotIndexed.

• Use LIBSQL_TEST_SERVER environment variable to run tests against a libSQL server instead of the hardcoded localhost:8080.

• BeginTx now returns a Transaction interface instead of a bob.Tx.

• Generated tests that required a database connection no longer create a new connection for each test. Instead it depends on a testDB connection that the user has to provide.

• In the generated models, relationships for ModelSlice are now loaded using arrays to reduce the number of parameter in the query.

  -- Before
  SELECT * FROM pilots WHERE jet_id IN ($1, $2, $3, ...); -- Parameters increase with the number of pilots
  
  -- After
  SELECT * FROM pilots WHERE jet_id IN (SELECT unnest(CAST($1 AS integer[])); -- Parameters are always 1

• In the generated model code, Preload is now a struct instead of multiple standaalone functions.
  It is now used like Preload.User.Pilots(), instead of PreloadUserPilots().

• In the generated model code, ThenLoad is now a struct and has been split for each query type.
  It is now used like SelectThenLoad.User.Pilots(), instead of ThenLoadUserPilots().

• In the generated model code, the Load interfaces no longer include the name of the source model since it is a method on the model.
  It now looks like *models.User.LoadPilots instead of *models.User.LoadUserPilots.

• Made changes to better support generating code in multiple languages.

• Mark queries with ON DUPLICATE KEY UPDATE as unretrievable in MySQL.

• Unretrievable INSERT queries using One, All, Cursor now immediately return orm.ErrCannotRetrieveRow instead of executing the query first.

• Generated tests are now run when testing drivers.

• MEDIUMINT and MEDIUMINT UNSIGNED are now generated as int16 and uint16 respectively. This is because Go doe not support 24 bit integers.

• The randomization function for floats, strings, and decimals now respect the limits set in the column definition.

• txid_snapshot is now generated as pgtypes.Snapshot instead of pgtypes.TxIDSnapshot.

• cidr postgres type is now generated as types.Text[netip.Prefix] instead of types.Text[netip.Addr].

• money postgres type is now generated as a string with a custom randomization expression instead of a decimal.

• Factory template mods now take a context argument. This allows for more control when using recursive mods.

• Removed WithOneRelations mod from factories, now replaced with WithParentsCascading which also includes parents for any parent relationships.

Removed

• Removed clause.Table and clause.From, and merge into clause.TableRef since they had overlapping functionality.
• Remove unnecessary context closure in generated join helpers.
• Remove the deprecated wipe generation option.
• Remove pgtypes.TxIDSnapshot type. This is now replaced with pgtypes.Snapshot.

Fixed

• Use correct row name for generated queries in bobgen-sqlite.
• Properly select query comment in bobgen-sqlite.
• Fixed issue with using generated queries with VALUES as mods.
• Moved Partitions in MySQL delete queries to after the table alias.
• Fixed issue with inserting into a table with all rows having default values in SQLite.
• Use table name and not table alias in SQLite returning clause since the alias is not available in the RETURNING clause.
• Fixed generated unique constraint errors for SQLite.
• Correctly resuse inserted rows in factories.

[v0.34.2] - 2025-05-01

Fixed

• Fix bug with bobgen-psql parsing of string identifiers in certain cases.

[v0.34.1] - 2025-04-30

Fixed

• Remove unnecessary limitation to place FETCH WITH TIES before OFFSET.
• Fix issue with verifying statements in bobgen-psql.

[v0.34.0] - 2025-04-30

Added

• Added support to generate code for UPDATE, and DELETE queries in bobgen-psql.

Changed

• Changed to non-cgo version of postgres parser.
• Changed the dir configuration for bobgen-sql to pattern and it now takes a glob pattern. This allows excluding certain files from being included (e.g. .down.sql files).

[v0.33.1] - 2025-04-26

Changed

• When a query returns only one column, instead of returning a struct with one field, it will return the type of the column. This is to make it easier to use the generated code.

Fixed

• Fix panic when scanning returned rows from generated queries.

[v0.33.0] - 2025-04-26

Added

• Added support to generate code for INSERT queries in bobgen-psql.
• clause.Confict now takes bob.Expression, and the fields are now moved to a clause.ConflictClause struct.

Changed

• Make grouped types in generated queries a type alias.

Removed

• Remove models.InsertWhere in generated code since it is not correct.

Fixed

• Fix issue with column query annotations in bobgen-psql.
• Fix issue with parsing multiple queries in the same file in bobgen-psql.
• Fix issue with correctly detecting the comment for the query annotation in bobgen-psql.
• Use a transaction in generated query tests.
• Account for LEFT, RIGHT and FULL joins when determining the nullability of a column.
• Generate WHERE helpers for ON CONFLICT clauses.

[v0.32.0] - 2025-04-24

Added

• Added templates for query generation.
• Added clause.OrderBy.ClearOrderBy()
• Added expr.ToArgs and expr.ToArgGroup functions to convert slices of a type to args.
• Add queries key to bobgen-sql and bobgen-sqlite configuration. This is used to specify what folder to search for queries in.
• Implement the Postgres query parser for SELECT statements.
• Implement the SQLite query parser for SELECT statements.
• Add templates for query generation.
• Add camelCase template function.
• Add types to the orm package to be used in generated queries. orm.ArgWithPosition, orm.ModExpression, orm.ModExecQuery and orm.ModQuery.
• Add function orm.ArgsToExpression for use in the generated code.
• Add String() method to bob.QueryType

Fixed

• Update mvdan.cc/gofumpt and give precedence to toolchain when calculating the Go version. (thanks @isgj)
• Add custom comparison support when loading relationships.
• Fix issue with scanning Postgres inet type.
• Set Arg and ArgGroup to NULL if there are no values.
• Do not call BeforeInsertHooks in the insert mod of a view.
• Fix issue with retrieving inserted rows with the MySQL driver.
• Add custom comparison for relationship loading. (thanks @kostaspt)

Changed

• clause.With now takes bob.Expression instead of clause.CTE. This makes it easier to use in generated queries without reconstruction an CTE.
• clause.OrderBy now takes bob.Expression instead of clause.OrderDef. This makes it easier to use in generated queries without reconstruction an OrderDef.
• clause.Windows now takes bob.Expression instead of clause.NamedWindow. This makes it easier to use in generated queries without reconstruction the window.
• clause.For renemaed to clause.Locks and can now take multiple locks.
• clause.Fetch now takes any instead of an integer.
• Several changes to the drivers.Query type as support is added for the new query parser.
• Enum types can now be matched by db_type in bobgen-psql as schema.enum_type. (thanks @abramlab)

Removed

• Removed clause.OrderBy.SetOrderBy() as it was only being used to clear the set order by clauses.

[v0.31.0] - 2025-03-26

Added

• Added support for libSQL. (thanks @mbezhanov)
• Added support for declaring types inside the models package. (thanks @jacobmolby)

Changed

• Generates error constants with unique indexes instead of unique constraints. (thanks @tlietz)

Fixed

• Used Equal method for comparing decimals. (thanks @jalaziz)
• Update golang.org/x/mod dependency to enable parsing of Go 1.23 modules. (thanks @m110)

[v0.30.0] - 2025-01-16

Added

• Added a new field QueryFolders to gen/drivers.DBInfo for drivers to be able to include information about parsed queries.
• Added gen/QueriesTemplates which in the future will contain base templates for generating code for parsed qureries.
• Added a QueryTemplate field to bobgen_helpers.Templates for drivers to include additional templates for queries.
• Added a new reserved output key queries. This is handled specially for each query folder supplied by the driver.
• Added new wm package to each dialect for mods that modify Window clauses.
• Added a new method Alias for View struct, for each dialect. It returns the alias of the view. (thanks @Nitjsefni7)

Changed

• Updated error constant generation to employ specific error types for making error matching easier. (thanks @mbezhanov)
• Collation in clause.OrderDef is now a string not an expression and is always quoted
• Calling UpdateAll, DeleteAll and ReloadAll on an empty model slice now returns nil without running any queries.
• UNION, INTERSECT and EXCEPT mods now append to the query instead of replacing it.
• Generated files now end with .bob.go instead of .go and are always cleaned up before generating new files. Singleton templates are now required to have a .bob.go.tpl extension.
• The expected structure for templates have been changed:
  • Previously, singleton templates should be kept in a singleton folder. Now, any template not inside a folder is considered a singleton template.
  • Previoulsy, templates in the root folder are merged and run for each table. Now, this will happen to templates in the table/ folder.
  • Previoulsy, the entire file tree and every subdirectory is walked to find templates. Now only templates in the root folder and the table/ folder are considered.
• Change From in clause.Window to BasedOn to avoid confusion with FromPreceding and FromFollowing. Also change SetFrom to SetBasedOn.
• Embed clause.OrderBy in clause.Window to make it possible to reuse OrderBy mods in window definitions.
• Change the Definition field in clause.NamedWindow from any to clause.Window for extra type safety.
• sm.Window now takes mods to modify the window clause.
• fm.Over now takes mods to modify the window for the window function.

Deprecated

• Deprecated the wipe option to delete all files in the output folder. Files are now generated with a .bob.go extension and are always cleaned up before generating new files.

Removed

• Remove redundatnt type parameters from orm.ExecQuery.
• Remove unnecessary interface in orm.Query and orm.ExecQuery.
• Remove the redundant clause.IWindow interface.
• Remove dialect.WindowMod and dialect.WindowMods which use chainable methods to modify Window clauses. This is now handled by the wm package which used mods.

Fixed

• Fix random value generation for pq.Float64Array factory (thanks @felipeparaujo)
• Using the UpdateMod() and DeleteMod() methods on an empty model slice now appends WHERE primary_key IN NULL which will return no results. Instead of WHERE primary_key IN () which is a syntax error.
• Ensure net/netip is imported for the pgtypes.Inet random expression (thanks @plunkettscott)
• Fix a data race when adding enum types.
• Fix missing schema in table alias in pkEQ and pkIN clauses (thanks @adatob).

[v0.29.0] - 2024-11-20

Added

• Added error constants for matching against both specific and generic unique constraint errors raised by the underlying database driver. (thanks @mbezhanov)
• Added support for regular expressions in the only and except table filters. (thanks @mbezhanov)
• Added ContextualMods which are similar to regular mods but take a context argument. They are applied whenever the query is built.
  This makes it cleaner to do certain things, like populating the select columns of a model if none was explicitly added.
  The previous way this was done was unreliable since using q.MustBuild() would not add the columns while bob.MustBuild(q) will add them correctly.
• modelSlice.UpdateMod() and modelSlice.DeleteMod() are new methods that returns a mod for update and delete queries on a slice of models.
  It adds WHERE pk IN (pk1, pk2, pk3, ...) to the query, and also schedule running the hooks.
• Added bob.ToMods which a slice of structs that implement bob.Mod[T] to a Mod. This is useful since Go does not allow using a slice of structs as a slice of an interface the struct implements.
• Added bob.HookableQuery interface. If a query implements this interface, the method RunHooks(ctx, exec) will be called before the query is executed.
• Added bob.HookableType interface. If a type implements this interface, the method AfterQueryHook(ctx, exec, bob.QueryType) will be called after the query is executed.
  This is how AfterSeleect/Insert/Update/DeleteHooks hooks are now implemented.
• Added Type() QueryType method to bob.Query to get the type of query it is. Available constants are Unknown, Select, Insert, Update, Delete.
• Postgres and SQLite Update/Delete queries now refresh the models after the query is executed. This is enabled by the RETURNING clause, so it is not available in MySQL.
• Added the Case() starter to all dialects to build CASE expressions. (thanks @k4n4ry)
• Added bob.Named() which is used to add named arguments to the query and bind them later.
• Added bob.BindNamed which takes an argument (struct, map, or a single value type) to be used to bind named arguments in a query. See changes to bob.Prepare() for details of which type can be used.
• Indexes now include more information such as the type, unique and comment fields.
• Constraints now include a comment field.
• Added Checks field to DBConstraints so that drivers can also load check constraints. (not yet supported by the SQLite driver).
• Added comments field to Table definitions.

Changed

• context.Context is now passed to Query.WriteQuery() and Expression.WriteSQL() methods. This allows for more control over how the query is built and executed.
  This change made is possible to delete some hacks and simplify the codebase.

  • The Name() and NameAs() methods of Views/Tables no longer need the context argument since the context will be passed when writing the expression. The API then becomes cleaner.
  • Preloading mods no longer need to store a context internally. SetLoadContext() and GetLoadContext() have removed.
  • The ToExpr field in orm.RelSide which was used for preloading is no longer needed and has been removed.

• Moved orm.Hooks to bob.Hooks since it should not be limited to only ORM queries.

• Moved mods.QueryModFunc to bob.ModFunc since it should be available to all packages.

• The mod capability for orm.Setter is now reversed. It should now be a mod for Insert and have a method that returns a mod for Update.
  This makes more sense since one would at most use one setter during updates, but can use multiple setters in a bulk insert.

• table.InsertQ has been renamed to table.Insert. The old implementation of Insert has been removed.
  The same functionality can be achieved in the following way:

  //----------------------------------------------
  // OLD WAY
  //----------------------------------------------
  user, err := models.Users.Insert(ctx, db, setter) // insert one
  users, err := models.Users.InsertMany(ctx, db, setters...) // insert many
  
  //----------------------------------------------
  // NEW WAY
  //----------------------------------------------
  user, err := models.Users.Insert(setter).One(ctx, db) // insert one
  users, err := models.Users.Insert(setters[0], setters[1]).All(ctx, db) // insert many
  
  // For cases where you already have a slice of setters and you want to pass them all, you can use `bob.ToMods`
  users, err := models.Users.Insert(bob.ToMods(setters)).All(ctx, db) // insert many

• table.UpdateQ has been renamed to table.Update. The old implementation of Update has been removed.
  The same functionality can be achieved by using model.Update() or modelSlice.UpdateAll().

• table.DeleteQ has been renamed to table.Delete. The old implementation of Delete has been removed.
  The same functionality can be achieved by using modelSlice.DeleteAll() or creating an Delete query using table.Delete().

• BeforeInsertHooks now only takes a single ModelSetter at a time.
  This is because it is not possible to know before executing the queries exactly how many setters are being used since additional rows can be inserted by applying another setter as a mod.

• bob.Cache() now requires an Executor. This is used to run any query hooks.

• bob.Prepare() now requires a type parameter to be used to bind named arguments. The type can either be:

  • A struct with fields that match the named arguments in the query
  • A map with string keys. When supplied, the values in the map will be used to bind the named arguments in the query.
  • When there is only a single named argument, one of the following can be used:
    • A primitive type (int, bool, string, etc)
    • time.Time
    • Any type that implements driver.Valuer.

• Index columns are no longer just strings, but are a struct to include more information such as the sort order.

Removed

• Remove MS SQL artifacts. (thanks @mbezhanov)
• Remove redundant type parameter from bob.Load.
• Removed Before/AfterUpsertMods. Upserts are really just inserts with a conflict clause and should be treated as such.
• Removed Insert/InsertMany/Upsert/UpsertMany methods from orm.Table since they are not needed.
  It is possible to do the same thing, with similar effor using the the InsertQ method (which is now renamed to Insert).
• Remove Update and Delete methods from orm.Table since they are not needed.
  It is possible to do the same thing, with similar effor using the the UpdateQ and DeleteQ methods (which are now renamed to Update and Delete).
• context.Context and bob.Executor are no longer passed when creating a Table/ViewQuery. It is now passed at the point of execution with Exec/One/All/Cursor.
• Remove Prepare methods from table and view qureries. Since bob.Prepare() now takes a type parameter, it is not possible to prepare from a method since Go does not allow additional type parameters in methods.
• Removed the Prisma and Atlas code generation drivers. It is better for Bob to focus on being able to generate code from the database in the most robust and detailed way and if the user wants, they can use other tools (such as prisma and atlas) to manage migrations before the code generation.
• Removed Expressions from Index definitions. It is now merged with the Columns field with an IsExpression field to indicate if the column is an expression.

Fixed

• Removed unnecessary import of strings in bobfactory_random.go.
• Fixed data races in unit tests. (thanks @mbezhanov)
• Fixed invalid SQL statements generated by sm.OrderBy().Collate(). (thanks @mbezhanov)
• Fixed a bug preventing specific columns from being excluded when generating models from SQLite. (thanks @mbezhanov)
• Fixed an issue where invalid code is generated if a configured relationship has from_where or to_where.
• Fixed ModelSlice.ReloadAll() method for models with multiple primary keys.

[v0.28.1] - 2024-06-28

Fixed

• Also add the enum to the type array if an array of the enum is added. This is to prvent issues if the enum is only used in an array.
• Handle null column names in expression indexes. (thanks @mbezhanov)
• CROSS JOINS now allow aliases

[v0.28.0] - 2024-06-25

Added

• Added the pgtypes.Inet for inet type in PostgreSQL. (thanks @gstarikov)
• Added the pgtypes.Macaddr for macaddr and macaddr8 types in PostgreSQL.
• Added the pgtypes.LSN type for the pg_lsn type in PostgreSQL.
• Added the pgtypes.TxIDSnapshot type for the txid_snapshot type in PostgreSQL.
• Added the pgtypes.TSVector type for the tsvector type in PostgreSQL.
• Added AliasOf property to codegen type definitions to allow for defining types that have their own randomization logic.
• Added DependsOn property to codegen type definitions to allow for defining types that depend on other types. This ensures that necessary code for the dependent types is generated.
• Add xml type definition for custom randomization logic.
• Add the Cast() starter to all dialects to build CAST(expr AS type) expressions.
• Load index information for MySQL, PostgreSQL, and SQLite tables. (thanks @mbezhanov)

Changed

• Changed the parray package to pgtypes.
• Moved HStore to the pgtypes package.
• Simplified how random expressions are written for types by using standalone functions instead of a single generic function.
• The default DebugPrinter now prints args a bit more nicely by using thier Value() method if they implement the driver.Valuer interface.
• Only generate 2 random values when testing random expressions.

Removed

• Removed types.Stringer[T]. It makes assumptions for how the type should be scanned and is not reliable.

Fixed

• Do not add FROM clause to SELECT queries that are used as subqueries.
• Enum values are now checked for validity after scanning.

[v0.27.1] - 2024-06-05

Fixed

• Fixed bug in Count() queries not removing the offset from the original query. (thanks @daddz)

[v0.27.0] - 2024-06-05

Added

• Add PreloadAs PreloadOption to override the join alias when preloading a relationship with a left join. (thanks @daddz)

• Add AliasedAs() method to tableColumns and tableWhere types to use a custom alias.

• Add AliasedAs() method to generated relationship join mods. This is avaible in two places:

  • one to change the alias of the table being queried

    models.SelectJoins.Jets.AliasedAs("j").InnerJoin.Pilots(ctx)

  • and the other to change the alias of the relationship.

    models.SelectJoins.Jets.InnerJoin.Pilots(ctx).AliasedAs("p")

• Add fm mods to all supported dialects (psql, mysql and sqlite). These are mods for functions and are used to modify the function call. For example:

  // import "github.com/stephenafamo/bob/dialect/psql/fm"
  psql.F( "count", "*",)(fm.Filter(psql.Quote("status").EQ(psql.S("done"))))

• Add MustCreate, MustCreateMany, CreateOrFail and CreateManyOrFail methods to generated factory Templates

Changed

• Change the function call point for generated relationship join mods. This reduces the amount of allocations and only does the work for the relationship being used.

  // Before
  models.SelectJoins(ctx).Jets.InnerJoin.Pilots
  // After
  models.SelectJoins.Jets.InnerJoin.Pilots(ctx)

• Changed the Count() function on Views to clone the query instead of changing the existing one. This makes queries reusable and the Count() function to behave as one would expect.

  // This now works as expected
  query := models.Jets.Query(ctx, db, /** list of various mods **/)
  count, err := query.Count()
  items, err := query.All()

• Changed how functions are modified. Instead of chained methods, the F() starter now returns a function which can be called with mods:

  // Before
  psql.F( "count", "*",).FilterWhere(psql.Quote("status").EQ(psql.S("done"))),
  // After
  // import "github.com/stephenafamo/bob/dialect/psql/fm"
  psql.F( "count", "*",)(fm.Filter(psql.Quote("status").EQ(psql.S("done")))),

  This makes it possible to support more queries.

• Use netip.Addr instead of netip.Prefix for Postgres cidr type.

• Use decimal.Decimal instead of string for Postgres money type.

• Use net.HardwareAddr for Postgres macaddr8 type, in addition to the macaddr type.

• Code generation now generates struct tags for the generated model Setters as well, if configured through the Tags configuration option. Previoulsy, only the model struct fields were tagged. (thanks @singhsays)

Removed

• Remove TableWhere function from the generated code. It was not used by the rest of the generated code and offered no clear benefit.
• Removed As starter. It takes an Expression and is not needed since the Expression has an As method which can be used directly.

Fixed

• Fix a bug with types.Stringer[T] where the wrong value was returned in the Value() method.

[v0.26.1] - 2024-05-26

Fixed

• Use netip.Prefix instead of netip.Addr for postgres inet column type. This makes it possible to contain a subnet.
• Allow underscores in enum variable names.
• Fix an issue with title casing enum values

[v0.26.0] - 2024-05-21

Added

• Add bobgen-sql a code generation driver for SQL schema files. Supports PostgreSQL and SQLite.
• Add new properties compare_expr and compare_expr_imports to the types configuration. This is used when comparing primary keys and in testing.
• Add never_required to relationships configuration. This makes sure the factories does not require the relationship to be set. Useful if you're not using foreign keys. (thanks @jacobmolby)
• Add wrapper types for Stringer, TextMarshaler/Unmarshaler, and BinaryMarshaler/Unmarshaler to the types configuration.
• Make generated enum types implement the fmt.Stringer, encoding.TextMarshaler, encoding.TextUnmarshaler, encoding.BinaryMarshaler and encoding.BinaryUnmarshaler interfaces.

Fixed

• Properly detect reference columns for implicit foreign keys in SQLite.
• Fix panic when generating random values for nullable columns. (thanks @jacobmolby)
• Sort relationships and imports for deterministic generated code. (thanks @jacobmolby)
• Correctly allow OVER () with an empty window definition in PostgreSQL. (thanks @relvacode)
• Set GROUP BY to NULL if there are no expressions to group by.
• Replace symbols in enum values with their unicode point to make them valid Go identifiers.
• Properly detect implicit foreign keys in SQLite.
• Fix issue with attaching multi-sided relationships. (thanks @jacobmolby)

[v0.25.0] - 2024-01-20

Changed

• Update github.com/jaswdr/faker dependency from v1 to v2

[v0.24.0] - 2024-01-20

Added

• Add randomization for all primitive types
• Add test for factory type randomization
• Drivers are now required to send in type definitions for generated types
• Custom types can now be configured at a top level in the config file

Changed

• Format generated files with gofumpt
• Replace key in replacements configuration is now a string referring to the type defined in the types configuration.

Removed

• Remove Imports from column definition.

Fixed

• INTEGER columns are now correctly generated as int32 not int

[v0.23.2] - 2024-01-04

Fixed

• Fix panic when inferring modify for relationships with no primary key
• Skip factory enum generation if there are no enums
• Return sql.ErrNoRows when Insert/Upsert returns nothing

[v0.23.1] - 2024-01-03

Fixed

• Do not wrap Setter.Expressions() in parenthesis

[v0.23.0] - 2024-01-03

Added

• Add bob.Cache() which saves the built SQL and args to prevent rebuilding the same query multiple times.
• Add As() starter to alias expressions
• Add OP() builder method for using custom operators
• Add table.InsertQ(ctx, db) now includes the insert columns from the table model.
• It is now possible to configure additional constraints for code generation.
• Add um.SetCol() which maintains the old behavior of um.Set().
• Generate additional Expressions() method for Setters to make it easier to use them in um.Set() or im.Set().

Changed

• Aliases configuration for code generation no longer has a top level table key
• When configuring relationships, from_unique, to_unique, key_nullable can no longer be configured. They are now inferred from the database.
• When configuring relationships, to_key has been changed to modify and should be set to from, to or "" to indicate which side of the relationship to modify. If left empty, Bob will try to guess which side to modify based on the presence of primary keys and unique columns.
• RelWhere.Value is now RelWhere.SQLValue
• Change CONFLICT/DUPLICATE KEY UPDATE to use mods instead of a chainable methods.
• Change um.Set() to take a list of expressions.
• Rename Setter method from Insert() to InsertMod() to avoid confusion.

Fixed

• Prevent generating duplicate relationships for many-to-many self-join relationships
• Correctly use table alias in generated relationship join mods
• Fix an issue where CTEs were encased in double parenthesis
• Fix invalid SQL generated when doing JOIN USING
• Correctly include "AS" in function query if alias is set
• Setters are also generated for tables that have relationships, even if they have no primary key
• Column aliases in CTEs are now correctly included in the final query
• Fix several issues with generating code for multi-sided relationships
• Fix an issue where loading many-to-many relationships cause no columns to be selected unless specified
• Fix an issue where many-to-many relationships would not be able to use nested loaders

[v0.22.0] - 2023-08-18

Added

• Expand expressions when used in Raw (thanks @RangelReale)
• Add InsertQ, UpdateQ, and DeleteQ methods to Table models to start INSERT, UPDATE and DELETE queries respectively.
• Allow column comment for replacement matching (thanks @jroenf)
• Add table query hooks to modify model queries
• Include WhereOr and WhereAnd to make it easier to combine multiple generated where clauses
• Print a warning if a replacement rule did not find a match (thanks @jacobmolby)

Changed

• Export generated factory.Factory struct
• Allow Limit and Offset to be used as Arguments in PostgreSQL (thanks @RangelReale)
• Make model hooks take slices not single objects
• Return rows affected from Exec() method of view queries instead of sql.Result
• Chain comparison methods now take an Expression instead of any
• Table models now require the types to implement orm.Table and orm.Setter interfaces.

Removed

• Remove UpdateAll and DeleteAll methods on the Table models.

Fixed

• Honor Only and Except in sqlite driver
• Always surround subqueries with parenthesis when used as an expression
• Fix mysql TablesInfo method and make sure we don't exclude entire table when targeting columns (thanks @jacobmolby)
• Fix bug in sqlite foreign key and join table detection

[v0.21.1] - 2023-05-22

Fixed

• Fix Upsert and UpsertAll methods of mysql.Table

[v0.21.0] - 2023-05-09

Changed

• Force uniqueness of relationship names in psql driver

Fixed

• Fix panic when attaching associated relationships
• Make getting a random integer for preloading thread-safe

[v0.20.6] - 2023-04-25

Fixed

• Check all members when loading relationships

[v0.20.5] - 2023-04-14

Fixed

• Fix panic in Insert/Attach Relationship loop

[v0.20.4] - 2023-04-07

Fixed

• Replace huandu/go-clone with qdm12/reprint

[v0.20.3] - 2023-04-06

Fixed

• Fix cloning bug by replacing jinzhu/copier with huandu/go-clone

[v0.20.2] - 2023-04-05

Fixed

• Account for windows when calculating models module path

[v0.20.1] - 2023-04-04

Fixed

• Update the generated code to use github.com/gofrs/uuid/v5
• Fix bug where auto-increment columns were marked as generated in the SQLite driver

[v0.20.0] - 2023-04-03

Added

• Add the PreloadWhere preload mod to filter what relation should be preloaded.
• ViewQuery now embeds bob.BaseQuery giving it additional methods like Apply and Build
• Add plugin support. Currently 3 plugin hooks are provided. PlugState, PlugDBInfo and PlugTemplateData.

Changed

• Make View.Name() return a dialect-specific expression
• Improve Debug helpers.
  • Debug writes query output to stdout
  • DebugToWriter writes the query output to any io.Writer with a fallback to stdout.
  • DebugToPrinter prints the query with a given bob.DebugPrinter. Also falls back to stdout.
• Rename OnlyColumns to PreloadOnly and ExceptColumns to PreloadExcept to be more consistent with the newly added PreloadWhere.
• JoinChain.On now takes Expressions instead of any.
• JoinChain.Using now takes strings instead of any.
• Export gen.TemplateData

Removed

• Remove ILIKE operator from MySQL since it is not supported.
• Removed Destination() method in driver interface.
• Removed PackageName() method in driver interface.

Fixed

• Account for possible clashes between column and relationship alias
• Make Preload mods work the same way as other query mods
• Avoid overwriting manually flipped relationships.
• Account for potentially null relationship in Load methods

[v0.19.1] - 2023-03-21

Fixed

• Fix On method for JoinChain in mysql and sqlite

[v0.19.0] - 2023-03-19

Added

• Add LIKE and ILIKE operators
• Print generated files
• Add no_reverse option for user-configured relationships

Changed

• Move common parts of loading to shared internal package

Fixed

• Fix generated joins for multi-sided relationships

[v0.18.2] - 2023-03-18

Fixed

• Account for relationships with tables that do not have a primary key in models and factories
• Properly extract preloaders nested in mods.QueryMods
• Fix bug in preloading with multiple sides
• Fix issue with multi-sided relationships that include views

[v0.18.1] - 2023-03-16

Fixed

• Make self-referencing foreign keys work
• Tweak factory types to make collisions even less likely

[v0.18.0] - 2023-03-12

Changed

• Comparison methods now require an expression (bob.Expression)

Removed

• No more X builder start function
• No more P builder method

[v0.17.3] - 2023-03-11

Fixed

• Fix bug with args in table updates
• Fix some typos in documentation (thanks @leonardtan13)

[v0.17.2] - 2023-03-09

Fixed

• Fix a bug when multiple multi-column foreign keys exist
• Multiple internal changes to the generator to make it easier to write a custom entrypoint
• More robust testing of code generatio