代碼優先遷移和存儲過程

Question

我剛剛創建了一個數據庫並完成了我的第一次遷移（只是一個簡單的表格添加）。現在我想添加一些存儲過程，這些存儲過程是通過編寫sql並在Management Studio中執行來添加的。但我希望在遷移時儘可能包含這些存儲過程，以便保存它們，並且可以針對它們運行向上或向下方法。這是可能的，如果是這樣，需要使用什麼語法？或者我只需要使用Management Studio添加/編輯/刪除它們？

Answer 1

我做這個是這樣的...

在目前的移民類 -

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類提供了創建/更改/刪除存儲過程

• 創建一個新的存儲過程

  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");     
      } 
  } 
  

• 修改存儲過程

  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; 
       ");    
      } 
  }