MigrationBuilder.AddForeignKey 方法

定义

命名空间:

Microsoft.EntityFrameworkCore.Migrations

程序集:

Microsoft.EntityFrameworkCore.Relational.dll

包:

Microsoft.EntityFrameworkCore.Relational v9.0.0

重载

AddForeignKey(String, String, String, String, String, String, String, ReferentialAction, ReferentialAction)	生成 以 AddForeignKeyOperation 向表添加新的外键。
AddForeignKey(String, String, String[], String, String, String, String[], ReferentialAction, ReferentialAction)	生成 以 AddForeignKeyOperation 向表添加新的复合 (多列) 外键。

AddForeignKey(String, String, String, String, String, String, String, ReferentialAction, ReferentialAction)

Source:

MigrationBuilder.cs

生成 以 AddForeignKeyOperation 向表添加新的外键。

public virtual Microsoft.EntityFrameworkCore.Migrations.Operations.Builders.OperationBuilder<Microsoft.EntityFrameworkCore.Migrations.Operations.AddForeignKeyOperation> AddForeignKey (string name, string table, string column, string principalTable, string? schema = default, string? principalSchema = default, string? principalColumn = default, Microsoft.EntityFrameworkCore.Migrations.ReferentialAction onUpdate = Microsoft.EntityFrameworkCore.Migrations.ReferentialAction.NoAction, Microsoft.EntityFrameworkCore.Migrations.ReferentialAction onDelete = Microsoft.EntityFrameworkCore.Migrations.ReferentialAction.NoAction);

abstract member AddForeignKey : string * string * string * string * string * string * string * Microsoft.EntityFrameworkCore.Migrations.ReferentialAction * Microsoft.EntityFrameworkCore.Migrations.ReferentialAction -> Microsoft.EntityFrameworkCore.Migrations.Operations.Builders.OperationBuilder<Microsoft.EntityFrameworkCore.Migrations.Operations.AddForeignKeyOperation>
override this.AddForeignKey : string * string * string * string * 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 AddForeignKey (name As String, table As String, column As String, principalTable As String, Optional schema As String = Nothing, Optional principalSchema As String = Nothing, Optional principalColumn 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。

table

String

包含外键的表。

column

String

受约束的列。

principalTable

String

外键受约束的表。

schema

String

包含表的架构，或者 null 是否应使用默认架构。

principalSchema

String

包含主体表的架构，或者 null 是否应使用默认架构。

principalColumn

String

外键列受约束的列，或 null 约束为主键列。

onUpdate

ReferentialAction

要对更新执行的操作。

onDelete

ReferentialAction

要对删除执行的操作。

返回

OperationBuilder<AddForeignKeyOperation>

一个生成器，允许将批注添加到操作中。

注解

有关详细信息和示例 ，请参阅数据库迁移 。

AddForeignKey(String, String, String[], String, String, String, String[], ReferentialAction, ReferentialAction)

Source:

MigrationBuilder.cs

生成 以 AddForeignKeyOperation 向表添加新的复合 (多列) 外键。

public virtual Microsoft.EntityFrameworkCore.Migrations.Operations.Builders.OperationBuilder<Microsoft.EntityFrameworkCore.Migrations.Operations.AddForeignKeyOperation> AddForeignKey (string name, string table, string[] columns, string principalTable, string? schema = default, string? principalSchema = default, string[]? principalColumns = default, Microsoft.EntityFrameworkCore.Migrations.ReferentialAction onUpdate = Microsoft.EntityFrameworkCore.Migrations.ReferentialAction.NoAction, Microsoft.EntityFrameworkCore.Migrations.ReferentialAction onDelete = Microsoft.EntityFrameworkCore.Migrations.ReferentialAction.NoAction);

abstract member AddForeignKey : string * string * string[] * string * string * string * string[] * Microsoft.EntityFrameworkCore.Migrations.ReferentialAction * Microsoft.EntityFrameworkCore.Migrations.ReferentialAction -> Microsoft.EntityFrameworkCore.Migrations.Operations.Builders.OperationBuilder<Microsoft.EntityFrameworkCore.Migrations.Operations.AddForeignKeyOperation>
override this.AddForeignKey : string * string * string[] * string * 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 AddForeignKey (name As String, table As String, columns As String(), principalTable As String, Optional schema As String = Nothing, Optional principalSchema As String = Nothing, Optional principalColumns 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。

table

String

包含外键的表。

columns

String[]

受约束的列的有序列表。

principalTable

String

外键受约束的表。

schema

String

包含表的架构，或者 null 是否应使用默认架构。

principalSchema

String

包含主体表的架构，或者 null 是否应使用默认架构。

principalColumns

String[]

外键列受约束的列，或 null 约束为主键列。

onUpdate

ReferentialAction

要对更新执行的操作。

onDelete

ReferentialAction

要对删除执行的操作。

返回

OperationBuilder<AddForeignKeyOperation>

一个生成器，允许将批注添加到操作中。

注解

有关详细信息和示例 ，请参阅数据库迁移 。