Add OrmLiteConfig.SkipForeignKeys option to create tables without FK constraints

Author: mythz

src/ServiceStack.OrmLite.Firebird/FirebirdOrmLiteDialectProvider.cs

@@ -317,7 +317,7 @@ public override string ToCreateTableStatement(Type tableType)
 
                 sbColumns.Append(columnDefinition);
 
-                if (fieldDef.ForeignKey == null)
+                if (fieldDef.ForeignKey == null || OrmLiteConfig.SkipForeignKeys)
                     continue;
 
                 var refModelDef = GetModel(fieldDef.ForeignKey.ReferenceType);

src/ServiceStack.OrmLite.MySql/MySqlDialectProvider.cs

@@ -166,7 +166,8 @@ public override string ToCreateTableStatement(Type tableType)
 
                 sbColumns.Append(GetColumnDefinition(fieldDef));
 
-                if (fieldDef.ForeignKey == null) continue;
+                if (fieldDef.ForeignKey == null || OrmLiteConfig.SkipForeignKeys)
+                    continue;
 
                 var refModelDef = GetModel(fieldDef.ForeignKey.ReferenceType);
                 sbConstraints.AppendFormat(

src/ServiceStack.OrmLite.Oracle/OracleOrmLiteDialectProvider.cs

@@ -802,7 +802,8 @@ public override string ToCreateTableStatement(Type tableType)
 
                 sbColumns.Append(columnDefinition);
 
-                if (fieldDef.ForeignKey == null) continue;
+                if (fieldDef.ForeignKey == null || OrmLiteConfig.SkipForeignKeys)
+                    continue;
 
                 var refModelDef = GetModel(fieldDef.ForeignKey.ReferenceType);
                 sbConstraints.AppendFormat(

src/ServiceStack.OrmLite.SqlServer/SqlServer2014OrmLiteDialectProvider.cs

@@ -8,7 +8,7 @@ namespace ServiceStack.OrmLite.SqlServer
 {
     public class SqlServer2014OrmLiteDialectProvider : SqlServer2012OrmLiteDialectProvider
     {
-        public static new SqlServer2014OrmLiteDialectProvider Instance = new SqlServer2014OrmLiteDialectProvider();
+        public new static SqlServer2014OrmLiteDialectProvider Instance = new SqlServer2014OrmLiteDialectProvider();
 
         public override string ToCreateTableStatement(Type tableType)
         {
@@ -61,7 +61,8 @@ public override string ToCreateTableStatement(Type tableType)
 
                 sbColumns.Append(columnDefinition);
 
-                if (fieldDef.ForeignKey == null) continue;
+                if (fieldDef.ForeignKey == null || OrmLiteConfig.SkipForeignKeys)
+                    continue;
 
                 var refModelDef = OrmLiteUtils.GetModelDefinition(fieldDef.ForeignKey.ReferenceType);
                 sbConstraints.Append(

src/ServiceStack.OrmLite.VistaDB/VistaDbDialectProvider.cs

@@ -146,18 +146,19 @@ public override string ToCreateTableStatement(Type tableType)
                         this.GetQuotedName("PK_" + modelDefinition.ModelName),
                         this.GetQuotedColumnName(fieldDef.FieldName));
                 }
-                else if (fieldDef.ForeignKey != null)
-                {
-                    var foreignModelDefinition = OrmLiteUtils.GetModelDefinition(fieldDef.ForeignKey.ReferenceType);
-                    constraints.AppendFormat("ALTER TABLE {0} ADD CONSTRAINT {1} FOREIGN KEY ({2}) REFERENCES {3} ({4}){5}{6};\n",
-                        quotedTableName,
-                        this.GetQuotedName(fieldDef.ForeignKey.GetForeignKeyName(modelDefinition, foreignModelDefinition, this.NamingStrategy, fieldDef)),
-                        this.GetQuotedColumnName(fieldDef.FieldName),
-                        this.GetQuotedTableName(foreignModelDefinition),
-                        this.GetQuotedColumnName(foreignModelDefinition.PrimaryKey.FieldName),
-                        this.GetForeignKeyOnDeleteClause(fieldDef.ForeignKey),
-                        this.GetForeignKeyOnUpdateClause(fieldDef.ForeignKey));
-                }
+
+                if (fieldDef.ForeignKey == null || OrmLiteConfig.SkipForeignKeys)
+                    continue;
+
+                var foreignModelDefinition = OrmLiteUtils.GetModelDefinition(fieldDef.ForeignKey.ReferenceType);
+                constraints.AppendFormat("ALTER TABLE {0} ADD CONSTRAINT {1} FOREIGN KEY ({2}) REFERENCES {3} ({4}){5}{6};\n",
+                    quotedTableName,
+                    this.GetQuotedName(fieldDef.ForeignKey.GetForeignKeyName(modelDefinition, foreignModelDefinition, this.NamingStrategy, fieldDef)),
+                    this.GetQuotedColumnName(fieldDef.FieldName),
+                    this.GetQuotedTableName(foreignModelDefinition),
+                    this.GetQuotedColumnName(foreignModelDefinition.PrimaryKey.FieldName),
+                    this.GetForeignKeyOnDeleteClause(fieldDef.ForeignKey),
+                    this.GetForeignKeyOnUpdateClause(fieldDef.ForeignKey));
             }
 
             return string.Format("CREATE TABLE {0} \n(\n  {1} \n); \n {2}\n",

src/ServiceStack.OrmLite/OrmLiteConfig.cs

@@ -194,6 +194,8 @@ public static IOrmLiteExecFilter ExecFilter
 
         public static bool DeoptimizeReader { get; set; }
 
+        public static bool SkipForeignKeys { get; set; }
+
         public static Func<string, string> ParamNameFilter { get; set; }
     }
 }

src/ServiceStack.OrmLite/OrmLiteDialectProviderBase.cs

@@ -1200,7 +1200,8 @@ public virtual string ToCreateTableStatement(Type tableType)
 
                 sbColumns.Append(columnDefinition);
 
-                if (fieldDef.ForeignKey == null) continue;
+                if (fieldDef.ForeignKey == null || OrmLiteConfig.SkipForeignKeys)
+                    continue;
 
                 var refModelDef = fieldDef.ForeignKey.ReferenceType.GetModelDefinition();
                 sbConstraints.Append(

tests/ServiceStack.OrmLite.Tests/ForeignKeyAttributeTests.cs

@@ -1,5 +1,7 @@
 using NUnit.Framework;
 using ServiceStack.DataAnnotations;
+using ServiceStack.Logging;
+using ServiceStack.Text;
 
 namespace ServiceStack.OrmLite.Tests
 {
@@ -119,6 +121,30 @@ public void CanCreateForeignWithOnDeleteSetNull()
                 dbConn.DropAndCreateTable<TypeWithOnDeleteSetNull>();
             }
         }
+
+        [Test]
+        public void Can_Skip_creating_ForeignKeys()
+        {
+            OrmLiteConfig.SkipForeignKeys = true;
+
+            using (var db = OpenDbConnection())
+            {
+                db.DropTable<TypeWithOnDeleteCascade>();
+                db.DropTable<ReferencedType>();
+                db.CreateTable<ReferencedType>();
+                db.CreateTable<TypeWithOnDeleteCascade>();
+
+                db.Save(new ReferencedType { Id = 1 });
+                db.Save(new TypeWithOnDeleteCascade { RefId = 1 });
+
+                db.Delete<ReferencedType>(r => r.Id == 1);
+
+                Assert.That(db.Select<ReferencedType>().Count, Is.EqualTo(0));
+                Assert.That(db.Select<TypeWithOnDeleteCascade>().Count, Is.EqualTo(1));
+            }
+
+            OrmLiteConfig.SkipForeignKeys = false;
+        }
     }
 
     public class ReferencedType