How to update entity framework 7 migrations and database - Code first

Question

In ef 7, i created an initial migration using command 'dnx ef migrations add Initial'. When i run the application database was created for me, all good.

Then i updated my entity objects (CSharp files). Now how can i do:

Update the existing migrations ? (Or i have to add new one?)
Update the already created database

I am getting error: An object already exists in database.

Also, any resources where i can find good practical examples for entity framework code first, as i am struggling to get to speed.

Thanks, Javed

Jash · Accepted Answer · 2016-03-05 12:29:25Z

8

Looks like i figure it out:

Add initial migration (our your first one). Command 'dnx ef migrations add Initial'
Run the application which will create the database for you.
Update your entity models (csharp classes)
Add a new migration again. DO NOT DELETE existing migration. Command: 'dnx ef migrations add Migration2'
Update your database. Command 'dnx ef database update Migration2 -v'

Hope it helps anyone.

answered Mar 5, 2016 at 12:29

Jash

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Aries · Accepted Answer · 2016-05-13 00:40:29Z

1

Here's an in depth guide to using EF7 Migrations tools from Julie Lerman, a Microsoft MVP.

https://msdn.microsoft.com/en-us/magazine/mt614250.aspx

answered May 13, 2016 at 0:40

Aries

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