初始迁移后，EF6中的update-database命令不起作用

Question

I got stuck at command:

update-database

while going through this tutorial by Tom Dysktra

Here is the error I am getting:

    PM> update-database
Specify the '-Verbose' flag to view the SQL statements being applied to the target database.
No pending explicit migrations.
Running Seed method.
System.Data.Entity.Core.EntityCommandExecutionException: An error occurred while executing the command definition. See the inner exception for details. ---> System.Data.SqlClient.SqlException: Invalid column name 'EmailAddress'.
   at System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction)
   at System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction)

...

    at System.Data.Entity.Migrations.MigrationsDomainCommand.Execute(Action command)
An error occurred while executing the command definition. See the inner exception for details.

Answer 1

Did you try the verbose command? I usually do the following in the console

update-database -force -verbose

It also says no pending migrations. I am going to take shot in the dark and guess you have automatic migrations turned off. which means before you can update-database you need to create a migration

add-migration NameItSomethingMeaningful

Now you can update-database

Answer 2

这意味着在您的种子调用中，您发生了一些无效的SQL调用-特别是您有一个查询，该查询返回的值可能与您要强制转换的类型不匹配。