52 lines
2.0 KiB
C#
52 lines
2.0 KiB
C#
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using Microsoft.EntityFrameworkCore.Migrations;
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#nullable disable
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namespace VOL.Core.Migrations
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{
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public partial class init023 : Migration
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{
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protected override void Up(MigrationBuilder migrationBuilder)
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{
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// 使用原生 SQL 查询来检查表是否存在并创建表
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migrationBuilder.Sql(@"
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IF NOT EXISTS (SELECT * FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_NAME = 'Sys_District')
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BEGIN
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CREATE TABLE [Sys_District] (
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[DistrictId] int NOT NULL IDENTITY,
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[CityCode] nvarchar(50) NULL,
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[DistrictCode] nvarchar(50) NULL,
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[DistrictName] nvarchar(50) NULL,
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CONSTRAINT [PK_Sys_District] PRIMARY KEY ([DistrictId])
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);
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END
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");
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// 添加列注释
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migrationBuilder.Sql(@"
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IF EXISTS (SELECT * FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_NAME = 'Sys_District')
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BEGIN
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DECLARE @defaultSchema AS sysname;
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SET @defaultSchema = SCHEMA_NAME();
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DECLARE @description AS sql_variant;
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SET @description = N'城市Code';
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EXEC sp_addextendedproperty 'MS_Description', @description, 'SCHEMA', @defaultSchema, 'TABLE', N'Sys_District', 'COLUMN', N'CityCode';
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SET @description = N'区县Code';
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EXEC sp_addextendedproperty 'MS_Description', @description, 'SCHEMA', @defaultSchema, 'TABLE', N'Sys_District', 'COLUMN', N'DistrictCode';
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SET @description = N'区县名称';
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EXEC sp_addextendedproperty 'MS_Description', @description, 'SCHEMA', @defaultSchema, 'TABLE', N'Sys_District', 'COLUMN', N'DistrictName';
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END
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");
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}
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protected override void Down(MigrationBuilder migrationBuilder)
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{
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migrationBuilder.DropTable(
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name: "Sys_District");
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}
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}
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}
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