Unable to update database to match the current model because there are pending changes and automatic migration is disabled

This short article shows you one of the ways to resolve the error “Unable to update database to match the current model because there are pending changes and automatic migration is disabled.”

When you have an existing Code First project sometime you will bump into the error “Unable to update database to match the current model because there are pending changes and automatic migration is disabled”.

Go to Tools -> NuGet Package Manager -> Package Manager Console (based on Visual Studio 2015).

Type:

PM> Add-migration

cmdlet Add-Migration at command pipeline position 1

Supply values for the following parameters:

Name: TourismContext

Scaffolding migration ‘TourismContext’.

The Designer Code for this migration file includes a snapshot of your current Code First model. This snapshot is used to calculate the changes to your model when you scaffold the next migration. If you make additional changes to your model that you want to include in this migration, then you can re-scaffold it by running ‘Add-Migration TourismContext’ again.

PM>

The TourismContext is just a name of the context, you might not use the same name.

After this type:

PM> Update-database

Advertisements

About chanmingman

Since March 2011 Microsoft Live Spaces migrated to Wordpress (http://www.pcworld.com/article/206455/Microsoft_Live_Spaces_Moves_to_WordPress_An_FAQ.html) till now, I have is over 1 million viewers. This blog is about more than 50% telling you how to resolve error messages, especial for Microsoft products. The blog also has a lot of guidance teaching you how to get stated certain Microsoft technologies. The blog also uses as a help to keep my memory. The blog is never meant to give people consulting services or silver bullet solutions. It is a contribution to the community. Thanks for your support over the years. Ming Man is Microsoft MVP since year 2006. He is a software development manager for a multinational company. With 25 years of experience in the IT field, he has developed system using Clipper, COBOL, VB5, VB6, VB.NET, Java and C #. He has been using Visual Studio (.NET) since the Beta back in year 2000. He and the team have developed many projects using .NET platform such as SCM, and HR based applications. He is familiar with the N-Tier design of business application and is also an expert with database experience in MS SQL, Oracle and AS 400.
This entry was posted in .Net, Community and tagged . Bookmark the permalink.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s