EF Core修改Migration更新数据库表

原创已于 2023-09-13 19:11:46 修改 · 874 阅读

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#数据库 #c#

于 2023-09-13 19:10:42 首次发布

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场景

需要通过EF Migration修改数据库一张表的名称，字段，主键，索引

一般重命名表，生成的ef migration会删除旧表，创建一张新表，如果想不删除旧表，需要修改生成的migration

protected override void Up(MigrationBuilder migrationBuilder)
{
			migrationBuilder.RenameTable(
                name: "oldTableName",
                newName: "newTableName");

            migrationBuilder.DropPrimaryKey(
                name: "old_pk",
                table: "newTableName");

            migrationBuilder.AddPrimaryKey("new_pk", "newTableName", "columnName");

            migrationBuilder.RenameIndex(
                name: "old_indexName",
                newName: "new_indexName",
                table: "newTableName");
            
            migrationBuilder.RenameColumn("old_columnName", "newTableName", "new_columnName");

}

protected override void Down(MigrationBuilder migrationBuilder)
        {
            migrationBuilder.RenameTable(
                name: "newTableName",
                newName: "oldTableName");

            migrationBuilder.DropPrimaryKey(
                name: "new_pk",
                table: "oldTableName");

            migrationBuilder.AddPrimaryKey("old_pk", "oldTableName", "coumnName");
            
            migrationBuilder.RenameIndex(
                name: "new_indexName",
                newName: "old_indexName",
                table: "oldTableName");
                
			migrationBuilder.RenameColumn("new_columnName", "oldTableName", "old_columnName");

        }