52 lines
1.9 KiB
C#
52 lines
1.9 KiB
C#
using Microsoft.EntityFrameworkCore.Migrations;
|
|
|
|
#nullable disable
|
|
|
|
namespace VOL.Core.Migrations
|
|
{
|
|
public partial class init022 : Migration
|
|
{
|
|
protected override void Up(MigrationBuilder migrationBuilder)
|
|
{
|
|
// 使用原生 SQL 查询来检查表是否存在并创建表
|
|
migrationBuilder.Sql(@"
|
|
IF NOT EXISTS (SELECT * FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_NAME = 'Sys_City')
|
|
BEGIN
|
|
CREATE TABLE [Sys_City] (
|
|
[CityId] int NOT NULL IDENTITY,
|
|
[ProvinceCode] nvarchar(50) NULL,
|
|
[CityName] nvarchar(50) NULL,
|
|
[CityCode] nvarchar(50) NULL,
|
|
CONSTRAINT [PK_Sys_City] PRIMARY KEY ([CityId])
|
|
);
|
|
END
|
|
");
|
|
|
|
// 添加列注释
|
|
migrationBuilder.Sql(@"
|
|
IF EXISTS (SELECT * FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_NAME = 'Sys_City')
|
|
BEGIN
|
|
DECLARE @defaultSchema AS sysname;
|
|
SET @defaultSchema = SCHEMA_NAME();
|
|
|
|
DECLARE @description AS sql_variant;
|
|
|
|
SET @description = N'省份Code';
|
|
EXEC sp_addextendedproperty 'MS_Description', @description, 'SCHEMA', @defaultSchema, 'TABLE', N'Sys_City', 'COLUMN', N'ProvinceCode';
|
|
|
|
SET @description = N'城市名称';
|
|
EXEC sp_addextendedproperty 'MS_Description', @description, 'SCHEMA', @defaultSchema, 'TABLE', N'Sys_City', 'COLUMN', N'CityName';
|
|
|
|
SET @description = N'城市Code';
|
|
EXEC sp_addextendedproperty 'MS_Description', @description, 'SCHEMA', @defaultSchema, 'TABLE', N'Sys_City', 'COLUMN', N'CityCode';
|
|
END
|
|
");
|
|
}
|
|
|
|
protected override void Down(MigrationBuilder migrationBuilder)
|
|
{
|
|
migrationBuilder.DropTable(
|
|
name: "Sys_City");
|
|
}
|
|
}
|
|
} |