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1198462239 created
4 Answer(s)
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- The error message in your screenshot indicates two main issues when running
dotnet ef migrations add
for multiple DbContexts:
- Entity Framework Tools Version Mismatch
- The EF Core tools version (
8.0.8
) is older than the runtime version (9.0.8
). - Solution: Update your EF Core tools to match the runtime version. Run:
- The EF Core tools version (
dotnet tool update --global dotnet-ef
Or, if you use a local tool manifest:
dotnet tool update dotnet-ef
- Unable to Create a DbContext Instance
- The error says it cannot create a
DbContext
of typeWaveSecureVeltris.EntityFrameworkCore.ConfigDbContext
. - This is usually caused by a missing or misconfigured
IDesignTimeDbContextFactory<ConfigDbContext>
. - Solution: Ensure you have a correctly implemented
ConfigDbContextFactory
in yourEntityFrameworkCore
project. The factory should look like:
- The error says it cannot create a
public class ConfigDbContextFactory : IDesignTimeDbContextFactory<ConfigDbContext> { public ConfigDbContext CreateDbContext(string[] args) { var optionsBuilder = new DbContextOptionsBuilder<ConfigDbContext>(); optionsBuilder.UseSqlServer("Your_Connection_String_Here"); return new ConfigDbContext(optionsBuilder.Options); } }
- Make sure the connection string is valid and the factory is in the same assembly as your
DbContext
.
Summary of Steps:
- Update EF Core tools to match your runtime.
- Double-check your
IDesignTimeDbContextFactory
implementation and connection string.
References:
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- The error message in your screenshot indicates two main issues when running
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hi
Can you share a project to reproduce?
liming.ma@volosoft.com
Thanks