EFコード最初に開発時に新しい列を追加する

Question

私はまだ開発環境と開発サーバーでデータベースを開発中です。

私はSQL Azureのデータベース上のデータベースを削除する権限を持っていないので、私はエラーを取得するので、私は、ef database dropコマンドを使用してデータベースを削除して再作成することはできません。

Are you sure you want to drop the database 'xxx-Dev' on server 'tcp:xxx1dev.database.windows.net,1433'? (y/N) y Dropping database 'xxx-Dev'. System.Data.SqlClient.SqlException: The server principal "xxxDebug" is not able to access the database "master" under the current security context. Cannot open database "master" requested by the login. The login failed.

私はマイグレーションを使用して、私は新しい列を追加する場合私はすでにダミーのデータを内部に持っています、新しい列はnullableですか？

どのようにすれば、データがすでに存在する場合に新しい列がNULL可能ではないのですか？

すべてのデータを削除してテーブルを0にしてから、updateコマンドを実行して新しい列でテーブルを更新する必要がありますか？

Answer 1

私はへのアクセスを持っていたむしろテーブルをドロップし、ゼロから新しい列を更新するために、EF、データベースの更新を使用して終了：

/* Azure friendly */ 
/* Drop all Foreign Key constraints */ 
DECLARE @name VARCHAR(128) 
DECLARE @constraint VARCHAR(254) 
DECLARE @SQL VARCHAR(254) 

SELECT @name = (SELECT TOP 1 TABLE_NAME FROM INFORMATION_SCHEMA.TABLE_CONSTRAINTS WHERE constraint_catalog=DB_NAME() AND CONSTRAINT_TYPE = 'FOREIGN KEY' ORDER BY TABLE_NAME) 

WHILE @name is not null 
BEGIN 
    SELECT @constraint = (SELECT TOP 1 CONSTRAINT_NAME FROM INFORMATION_SCHEMA.TABLE_CONSTRAINTS WHERE constraint_catalog=DB_NAME() AND CONSTRAINT_TYPE = 'FOREIGN KEY' AND TABLE_NAME = @name ORDER BY CONSTRAINT_NAME) 
    WHILE @constraint IS NOT NULL 
    BEGIN 
     SELECT @SQL = 'ALTER TABLE [dbo].[' + RTRIM(@name) +'] DROP CONSTRAINT [' + RTRIM(@constraint) +']' 
     EXEC (@SQL) 
     PRINT 'Dropped FK Constraint: ' + @constraint + ' on ' + @name 
     SELECT @constraint = (SELECT TOP 1 CONSTRAINT_NAME FROM INFORMATION_SCHEMA.TABLE_CONSTRAINTS WHERE constraint_catalog=DB_NAME() AND CONSTRAINT_TYPE = 'FOREIGN KEY' AND CONSTRAINT_NAME <> @constraint AND TABLE_NAME = @name ORDER BY CONSTRAINT_NAME) 
    END 
SELECT @name = (SELECT TOP 1 TABLE_NAME FROM INFORMATION_SCHEMA.TABLE_CONSTRAINTS WHERE constraint_catalog=DB_NAME() AND CONSTRAINT_TYPE = 'FOREIGN KEY' ORDER BY TABLE_NAME) 
END 
GO 

/* Drop all Primary Key constraints */ 
DECLARE @name VARCHAR(128) 
DECLARE @constraint VARCHAR(254) 
DECLARE @SQL VARCHAR(254) 

SELECT @name = (SELECT TOP 1 TABLE_NAME FROM INFORMATION_SCHEMA.TABLE_CONSTRAINTS WHERE constraint_catalog=DB_NAME() AND CONSTRAINT_TYPE = 'PRIMARY KEY' ORDER BY TABLE_NAME) 

WHILE @name IS NOT NULL 
BEGIN 
    SELECT @constraint = (SELECT TOP 1 CONSTRAINT_NAME FROM INFORMATION_SCHEMA.TABLE_CONSTRAINTS WHERE constraint_catalog=DB_NAME() AND CONSTRAINT_TYPE = 'PRIMARY KEY' AND TABLE_NAME = @name ORDER BY CONSTRAINT_NAME) 
    WHILE @constraint is not null 
    BEGIN 
     SELECT @SQL = 'ALTER TABLE [dbo].[' + RTRIM(@name) +'] DROP CONSTRAINT [' + RTRIM(@constraint)+']' 
     EXEC (@SQL) 
     PRINT 'Dropped PK Constraint: ' + @constraint + ' on ' + @name 
     SELECT @constraint = (SELECT TOP 1 CONSTRAINT_NAME FROM INFORMATION_SCHEMA.TABLE_CONSTRAINTS WHERE constraint_catalog=DB_NAME() AND CONSTRAINT_TYPE = 'PRIMARY KEY' AND CONSTRAINT_NAME <> @constraint AND TABLE_NAME = @name ORDER BY CONSTRAINT_NAME) 
    END 
SELECT @name = (SELECT TOP 1 TABLE_NAME FROM INFORMATION_SCHEMA.TABLE_CONSTRAINTS WHERE constraint_catalog=DB_NAME() AND CONSTRAINT_TYPE = 'PRIMARY KEY' ORDER BY TABLE_NAME) 
END 
GO 

/* Drop all tables */ 
DECLARE @name VARCHAR(128) 
DECLARE @SQL VARCHAR(254) 

SELECT @name = (SELECT TOP 1 [name] FROM sysobjects WHERE [type] = 'U' AND category = 0 ORDER BY [name]) 

WHILE @name IS NOT NULL 
BEGIN 
    SELECT @SQL = 'DROP TABLE [dbo].[' + RTRIM(@name) +']' 
    EXEC (@SQL) 
    PRINT 'Dropped Table: ' + @name 
    SELECT @name = (SELECT TOP 1 [name] FROM sysobjects WHERE [type] = 'U' AND category = 0 AND [name] > @name ORDER BY [name]) 
END 
GO