代码优先迁移和存储过程

Question

我刚刚创建了一个数据库并完成了我的第一次迁移(只是一个简单的表添加).现在我想添加一些我刚刚添加的存储过程,通过编写sql并在Management Studio中执行它.但是我希望在迁移中包含这些存储过程,以便保存它们,并且我可以针对它们运行Up或Down方法.这是可能的,如果是这样,需要使用什么语法？或者我只需要使用Management Studio添加/编辑/删除它们？

Answer 1

我这样做了......

在当前的迁移类中 -

public partial class MyMigration : DbMigration
{
    public override void Up()
    {
        ... other table creation logic

        // This command executes the SQL you have written
        // to create the stored procedures
        Sql(InstallScript);

        // or, to alter stored procedures
        Sql(AlterScript);
    }

    public override void Down()
    {
        ... other table removal logic

        // This command executes the SQL you have written
        // to drop the stored procedures
        Sql(UninstallScript);

        // or, to rollback stored procedures
        Sql(RollbackScript);
    }

    private const string InstallScript = @"
        CREATE PROCEDURE [dbo].[MyProcedure]
        ... SP logic here ...
    ";

    private const string UninstallScript = @"
        DROP PROCEDURE [dbo].[MyProcedure];
    ";

    // or for alters
    private const string AlterScript = @"
        ALTER PROCEDURE [dbo].[AnotherProcedure]
        ... Newer SP logic here ...
    ";

    private const string RollbackScript = @"
        ALTER PROCEDURE [dbo].[AnotherProcedure]
        ... Previous / Old SP logic here ...
    ";
}

Answer 2

我正在使用EF6,DbMigration该类提供了创建/更改/删除存储过程的方法

• 创建一个新的存储过程

  public partial class MyFirstMigration : DbMigration
  {
      public override void Up()
      {
          // Create a new store procedure
          CreateStoredProcedure("dbo.DequeueMessages"
          // These are stored procedure parameters
          , c => new{                
              MessageCount = c.Int()
          },
          // Here is the stored procedure body
          @"
          SET NOCOUNT ON;
          SELECT TOP (@MessageCount)
              *
          FROM
              dbo.MyTable;
          ");
      }
  
      public override void Down()
      {
          // Delete the stored procedure
          DropStoredProcedure("dbo.DequeueMessages");                
      }
  }
  

• 修改存储过程

  public partial class MySecondMigration : DbMigration
  {
      public override void Up()
      {
          // Modify an existing stored procedure
          AlterStoredProcedure("dbo.DequeueMessages"
          // These are new stored procedure parameters
          , c => new{                
              MessageCount = c.Int(),
              StatusId = c.Int()
          },
          // Here is the new stored procedure body
          @"
          SET NOCOUNT ON;
          SELECT TOP (@MessageCount)
              *
          FROM
              dbo.MyTable
          WHERE
              StatusId = @StatusId;
          ");
      }
  
      public override void Down()
      {
          // Rollback to the previous stored procedure
          // Modify an existing stored procedure
          AlterStoredProcedure("dbo.DequeueMessages"
          // These are old stored procedure parameters
          , c => new{                
              MessageCount = c.Int()
          },
          // Here is the old stored procedure body
          @"
          SET NOCOUNT ON;
          SELECT TOP (@MessageCount)
              *
          FROM
              dbo.MyTable;
          ");              
      }
  }