Question

以下是表格的SQL：

CREATE TABLE [dbo].[AspNetUserRoles] (
    [UserId] INT NOT NULL,
    [RoleId] INT NOT NULL,
    CONSTRAINT [PK_dbo.AspNetUserRoles] PRIMARY KEY CLUSTERED ([UserId] ASC, [RoleId] ASC),
    CONSTRAINT [FK_dbo.AspNetUserRoles_dbo.AspNetRoles_RoleId] FOREIGN KEY ([RoleId]) REFERENCES [dbo].[AspNetRoles] ([Id]) ON DELETE CASCADE,
    CONSTRAINT [FK_dbo.AspNetUserRoles_dbo.AspNetUsers_UserId] FOREIGN KEY ([UserId]) REFERENCES [dbo].[AspNetUsers] ([Id]) ON DELETE CASCADE
);

CREATE TABLE [dbo].[AspNetRoles] (
    [Id]   INT            IDENTITY (1, 1) NOT NULL,
    [Name] NVARCHAR (256) NOT NULL,
    CONSTRAINT [PK_dbo.AspNetRoles] PRIMARY KEY CLUSTERED ([Id] ASC)
);


CREATE TABLE [dbo].[AspNetUsers] (
    [Id]                   INT            IDENTITY (1, 1) NOT NULL,
    [FirstName]            NVARCHAR (MAX) NULL,
    [LastName]             NVARCHAR (MAX) NULL,
    CONSTRAINT [PK_dbo.AspNetUsers] PRIMARY KEY CLUSTERED ([Id] ASC)
);


GO
CREATE UNIQUE NONCLUSTERED INDEX [UserNameIndex]
    ON [dbo].[AspNetUsers]([UserName] ASC);

有人能帮助我吗？我想要的是当有一个用户被分配到一个角色然后我想尝试删除该角色失败。

Answer 1

您的问题来自ON DELETE CASCADE行。此行表示所有连接到要删除的记录的外键的记录本身都将被删除。

你可能想要ON DELETE NO ACTION。这将做你想要的。您应该能够查找是否有任何内容被查询调用的返回值删除（ - 它应该是一个包含更改行数的整数）。

如果存在具有该角色的UserId，如何阻止ASP.NET Identity删除角色？

1 个答案: