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（只是一个简单的表格添加）。现在我想添加一些存储过程，这些存储过程是通过编写sql并在Management Studio中执行来添加的。但我希望在迁移时尽可能包含这些存储过程，以便保存它们，并且可以针对它们运行向上或向下方法。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

我做这个是这样的...

在目前的移民类 -

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

我使用EF6和DbMigration类提供了创建/更改/删除存储过程

• 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; 
       ");    
      } 
  }