CreateTableBuilder<TColumns>.ForeignKey 方法

定义

命名空间:

Microsoft.EntityFrameworkCore.Migrations.Operations.Builders

程序集:

Microsoft.EntityFrameworkCore.Relational.dll

包:

Microsoft.EntityFrameworkCore.Relational v9.0.0

重载

ForeignKey(String, Expression<Func<TColumns,Object>>, String, String, String, ReferentialAction, ReferentialAction)	在表上配置单列外键。
ForeignKey(String, Expression<Func<TColumns,Object>>, String, String[], String, ReferentialAction, ReferentialAction)	在表上配置多列 (复合) 外键。

ForeignKey(String, Expression<Func<TColumns,Object>>, String, String, String, ReferentialAction, ReferentialAction)

Source:

CreateTableBuilder.cs

在表上配置单列外键。

public virtual Microsoft.EntityFrameworkCore.Migrations.Operations.Builders.OperationBuilder<Microsoft.EntityFrameworkCore.Migrations.Operations.AddForeignKeyOperation> ForeignKey (string name, System.Linq.Expressions.Expression<Func<TColumns,object>> column, string principalTable, string? principalColumn = default, string? principalSchema = default, Microsoft.EntityFrameworkCore.Migrations.ReferentialAction onUpdate = Microsoft.EntityFrameworkCore.Migrations.ReferentialAction.NoAction, Microsoft.EntityFrameworkCore.Migrations.ReferentialAction onDelete = Microsoft.EntityFrameworkCore.Migrations.ReferentialAction.NoAction);

abstract member ForeignKey : string * System.Linq.Expressions.Expression<Func<'Columns, obj>> * string * string * string * Microsoft.EntityFrameworkCore.Migrations.ReferentialAction * Microsoft.EntityFrameworkCore.Migrations.ReferentialAction -> Microsoft.EntityFrameworkCore.Migrations.Operations.Builders.OperationBuilder<Microsoft.EntityFrameworkCore.Migrations.Operations.AddForeignKeyOperation>
override this.ForeignKey : string * System.Linq.Expressions.Expression<Func<'Columns, obj>> * string * string * string * Microsoft.EntityFrameworkCore.Migrations.ReferentialAction * Microsoft.EntityFrameworkCore.Migrations.ReferentialAction -> Microsoft.EntityFrameworkCore.Migrations.Operations.Builders.OperationBuilder<Microsoft.EntityFrameworkCore.Migrations.Operations.AddForeignKeyOperation>

Public Overridable Function ForeignKey (name As String, column As Expression(Of Func(Of TColumns, Object)), principalTable As String, Optional principalColumn As String = Nothing, Optional principalSchema As String = Nothing, Optional onUpdate As ReferentialAction = Microsoft.EntityFrameworkCore.Migrations.ReferentialAction.NoAction, Optional onDelete As ReferentialAction = Microsoft.EntityFrameworkCore.Migrations.ReferentialAction.NoAction) As OperationBuilder(Of AddForeignKeyOperation)

参数

name

String

外键约束名称。

column

Expression<Func<TColumns,Object>>

用于外键的列。

principalTable

String

外键被约束到的表。

principalColumn

String

外键列所约束的列。

principalSchema

String

包含外键所约束的表的架构。

onUpdate

ReferentialAction

要 ReferentialAction 用于更新的 。

onDelete

ReferentialAction

要 ReferentialAction 用于删除的 。

返回

OperationBuilder<AddForeignKeyOperation>

同一生成器，以便可以链接多个调用。

ForeignKey(String, Expression<Func<TColumns,Object>>, String, String[], String, ReferentialAction, ReferentialAction)

Source:

CreateTableBuilder.cs

在表上配置多列 (复合) 外键。

public virtual Microsoft.EntityFrameworkCore.Migrations.Operations.Builders.OperationBuilder<Microsoft.EntityFrameworkCore.Migrations.Operations.AddForeignKeyOperation> ForeignKey (string name, System.Linq.Expressions.Expression<Func<TColumns,object>> columns, string principalTable, string[]? principalColumns, string? principalSchema = default, Microsoft.EntityFrameworkCore.Migrations.ReferentialAction onUpdate = Microsoft.EntityFrameworkCore.Migrations.ReferentialAction.NoAction, Microsoft.EntityFrameworkCore.Migrations.ReferentialAction onDelete = Microsoft.EntityFrameworkCore.Migrations.ReferentialAction.NoAction);

abstract member ForeignKey : string * System.Linq.Expressions.Expression<Func<'Columns, obj>> * string * string[] * string * Microsoft.EntityFrameworkCore.Migrations.ReferentialAction * Microsoft.EntityFrameworkCore.Migrations.ReferentialAction -> Microsoft.EntityFrameworkCore.Migrations.Operations.Builders.OperationBuilder<Microsoft.EntityFrameworkCore.Migrations.Operations.AddForeignKeyOperation>
override this.ForeignKey : string * System.Linq.Expressions.Expression<Func<'Columns, obj>> * string * string[] * string * Microsoft.EntityFrameworkCore.Migrations.ReferentialAction * Microsoft.EntityFrameworkCore.Migrations.ReferentialAction -> Microsoft.EntityFrameworkCore.Migrations.Operations.Builders.OperationBuilder<Microsoft.EntityFrameworkCore.Migrations.Operations.AddForeignKeyOperation>

Public Overridable Function ForeignKey (name As String, columns As Expression(Of Func(Of TColumns, Object)), principalTable As String, principalColumns As String(), Optional principalSchema As String = Nothing, Optional onUpdate As ReferentialAction = Microsoft.EntityFrameworkCore.Migrations.ReferentialAction.NoAction, Optional onDelete As ReferentialAction = Microsoft.EntityFrameworkCore.Migrations.ReferentialAction.NoAction) As OperationBuilder(Of AddForeignKeyOperation)

参数

name

String

外键约束名称。

columns

Expression<Func<TColumns,Object>>

用于外键的列。

principalTable

String

外键被约束到的表。

principalColumns

String[]

外键列受约束的列。

principalSchema

String

包含外键所约束的表的架构。

onUpdate

ReferentialAction

要 ReferentialAction 用于更新的 。

onDelete

ReferentialAction

要 ReferentialAction 用于删除的 。

返回

OperationBuilder<AddForeignKeyOperation>

同一生成器，以便可以链接多个调用。