How to Use MySQL with Entity Framework 4 and Code-First Development CTP?

Using MySql with Entity Framework 4 and the Code-First Development CTP

Issue:

An attempt to use MySql with Entity Framework 4 and the Code-First Development CTP results in a ProviderIncompatibleException, both when trying to generate the database automatically and when the database already exists.

Solution:

• Verify that the database exists before using the Code-First approach. Entity Framework cannot create the database for you with MySql.
• Create a connection string for each DB context used, using the DBContext name as the connection string name.
• Note that Entity Framework will use the name of the DBSet property as the table name.
• Add a DataFactory to the web.config when deploying your MVC site using MySQL, as different MySql connectors and versions may require it. Ensure the version number matches the MySQL.Data.dll deployed with the site.

Additional Notes:

• Copy the necessary MySQL DLLs to the deployment directory, ensuring version compatibility.
• For example, a connection string for a DB context named "NerdDinners" would be:

<add name="NerdDinners"
         connectionString="Server=localhost; Database=NerdDinners; Uid=root; Pwd=;"
         providerName="MySql.Data.MySqlClient"/>

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