Find records through query output (pointfreeco#35)

Improves representable values like UUID:

```diff
-Reminder.find(UUID.LowercasedRepresentation(queryOutput: reminderID))
+Reminder.find(reminderID)
```

Author: stephencelis

Sources/StructuredQueriesCore/PrimaryKeyed.swift

@@ -49,8 +49,8 @@ extension PrimaryKeyedTable {
   ///
   /// - Parameter primaryKey: A primary key identifying a table row.
   /// - Returns: A `WHERE` clause.
-  public static func find(_ primaryKey: TableColumns.PrimaryKey) -> Where<Self> {
-    Self.where { $0.primaryKey.eq(primaryKey) }
+  public static func find(_ primaryKey: TableColumns.PrimaryKey.QueryOutput) -> Where<Self> {
+    Self.where { $0.primaryKey.eq(TableColumns.PrimaryKey(queryOutput: primaryKey)) }
   }
 }
 
@@ -59,8 +59,8 @@ extension Where where From: PrimaryKeyedTable {
   ///
   /// - Parameter primaryKey: A primary key.
   /// - Returns: A where clause with the added primary key.
-  public func find(_ primaryKey: From.TableColumns.PrimaryKey) -> Self {
-    self.where { $0.primaryKey.eq(primaryKey) }
+  public func find(_ primaryKey: From.TableColumns.PrimaryKey.QueryOutput) -> Self {
+    self.where { $0.primaryKey.eq(From.TableColumns.PrimaryKey(queryOutput: primaryKey)) }
   }
 }
 
@@ -69,8 +69,8 @@ extension Update where From: PrimaryKeyedTable {
   ///
   /// - Parameter primaryKey: A primary key identifying a table row.
   /// - Returns: An update statement filtered by the given key.
-  public func find(_ primaryKey: From.TableColumns.PrimaryKey) -> Self {
-    self.where { $0.primaryKey.eq(primaryKey) }
+  public func find(_ primaryKey: From.TableColumns.PrimaryKey.QueryOutput) -> Self {
+    self.where { $0.primaryKey.eq(From.TableColumns.PrimaryKey(queryOutput: primaryKey)) }
   }
 }
 
@@ -79,8 +79,8 @@ extension Delete where From: PrimaryKeyedTable {
   ///
   /// - Parameter primaryKey: A primary key identifying a table row.
   /// - Returns: A delete statement filtered by the given key.
-  public func find(_ primaryKey: From.TableColumns.PrimaryKey) -> Self {
-    self.where { $0.primaryKey.eq(primaryKey) }
+  public func find(_ primaryKey: From.TableColumns.PrimaryKey.QueryOutput) -> Self {
+    self.where { $0.primaryKey.eq(From.TableColumns.PrimaryKey(queryOutput: primaryKey)) }
   }
 }
 
@@ -89,7 +89,7 @@ extension Select where From: PrimaryKeyedTable {
   ///
   /// - Parameter primaryKey: A primary key identifying a table row.
   /// - Returns: A select statement filtered by the given key.
-  public func find(_ primaryKey: From.TableColumns.PrimaryKey) -> Self {
+  public func find(_ primaryKey: From.TableColumns.PrimaryKey.QueryOutput) -> Self {
     self.and(From.find(primaryKey))
   }
 }

Tests/StructuredQueriesTests/PrimaryKeyedTableTests.swift

@@ -1,10 +1,14 @@
+import Dependencies
 import Foundation
 import InlineSnapshotTesting
 import StructuredQueries
+import StructuredQueriesSQLite
 import Testing
 
 extension SnapshotTests {
   struct PrimaryKeyedTableTests {
+    @Dependency(\.defaultDatabase) var database
+
     @Test func count() {
       assertQuery(Reminder.select { $0.count() }) {
         """
@@ -150,9 +154,41 @@ extension SnapshotTests {
       }
     }
 
+    @Test func uuid() throws {
+      try database.execute(
+        #sql(
+          """
+          CREATE TABLE "rows" (id TEXT PRIMARY KEY NOT NULL)
+          """
+        )
+      )
+      try database.execute(Row.insert(Row(id: UUID(1))))
+      assertQuery(
+        Row.find(UUID(1))
+      ) {
+        """
+        SELECT "rows"."id"
+        FROM "rows"
+        WHERE ("rows"."id" = '00000000-0000-0000-0000-000000000001')
+        """
+      } results: {
+        """
+        ┌─────────────────────────────────────────────────────┐
+        │ Row(id: UUID(00000000-0000-0000-0000-000000000001)) │
+        └─────────────────────────────────────────────────────┘
+        """
+      }
+    }
+
     @Test func joinWith() {
-      //RemindersList.join(Reminder.all, with: \.remindersListID)
-      //Reminder.join(RemindersList.all, with: \.remindersListID)
+      // RemindersList.join(Reminder.all, with: \.remindersListID)
+      // Reminder.join(RemindersList.all, with: \.remindersListID)
     }
   }
 }
+
+@Table
+private struct Row {
+  @Column(as: UUID.LowercasedRepresentation.self)
+  let id: UUID
+}