I am having difficulties to scaffold an existing MySQL database using EF core.
I have added the required dependencies as mentioned in the oracle doc:
<PackageReference Include="Microsoft.EntityFrameworkCore" Version="6.0.0" /> <PackageReference Include="Microsoft.EntityFrameworkcore.Tools" Version="6.0.0">
and then, I ran this code in the package manager console:
Scaffold-Dbcontext "server=the.server.ip.address;user=user_name;database=db_name;password=db_password;port=3306" MySql.EntityFrameworkCore -o Data -v
It shows this error:
Unable to resolve service for type
while attempting to activate
Here are the relevant logs in the output window:
Finding design-time services referenced by assembly 'Test2'... Finding design-time services referenced by assembly 'Test2'... No referenced design-time services were found. Finding design-time services for provider 'MySql.EntityFrameworkCore'... Using design-time services from provider 'MySql.EntityFrameworkCore'. Finding IDesignTimeServices implementations in assembly 'Test2'... No design-time services were found.
I don’t know how shall I implement the design time classes and nor did I find any useful links in the web.
Note that I can access and run query on the database using MySQL Workbench.
I came across the same issue trying to scaffold an existing MySQL database. It looks like the latest version of MySql.EntityFrameworkCore (6.0.0-preview3.1) still uses the EFCore 5.0 libraries and has not been updated to EFCore 6.0.
It also seems Microsoft.EntityFrameworkCore.Diagnostics was last implemented in EFCore 5 and removed in 6.
When I downgraded all the packages to the 5 version level, I was able to run the scaffold command without that error.
Answered By – James Ruth
Answer Checked By – Dawn Plyler (BugsFixing Volunteer)