2.1.0-preview1 No suitable constructor found for entity type 'PostgisPoint', works with 2.0.1 .

[summershrimp]

 Add-Migration AddEntities
System.InvalidOperationException: No suitable constructor found for entity type 'PostgisPoint'. The following parameters could not be bound to properties of the entity: 'x', 'y'.
   at Microsoft.EntityFrameworkCore.Metadata.Conventions.Internal.ConstructorBindingConvention.Apply(InternalModelBuilder modelBuilder)
   at Microsoft.EntityFrameworkCore.Metadata.Conventions.Internal.ConventionDispatcher.ImmediateConventionScope.OnModelBuilt(InternalModelBuilder modelBuilder)
   at Microsoft.EntityFrameworkCore.Infrastructure.ModelSource.CreateModel(DbContext context, IConventionSetBuilder conventionSetBuilder, IModelValidator validator)
   at System.Collections.Concurrent.ConcurrentDictionary`2.GetOrAdd(TKey key, Func`2 valueFactory)
   at Microsoft.EntityFrameworkCore.Internal.DbContextServices.CreateModel()
   at Microsoft.EntityFrameworkCore.Internal.DbContextServices.get_Model()
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitScoped(ScopedCallSite scopedCallSite, ServiceProviderEngineScope scope)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitConstructor(ConstructorCallSite constructorCallSite, ServiceProviderEngineScope scope)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitScoped(ScopedCallSite scopedCallSite, ServiceProviderEngineScope scope)
   at Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetRequiredService(IServiceProvider provider, Type serviceType)
   at Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetRequiredService[T](IServiceProvider provider)
   at Microsoft.EntityFrameworkCore.DbContext.get_DbContextDependencies()
   at Microsoft.EntityFrameworkCore.DbContext.get_InternalServiceProvider()
   at Microsoft.EntityFrameworkCore.Internal.InternalAccessorExtensions.GetService[TService](IInfrastructure`1 accessor)
   at Microsoft.EntityFrameworkCore.Design.Internal.DbContextOperations.CreateContext(Func`1 factory)
   at Microsoft.EntityFrameworkCore.Design.Internal.DbContextOperations.CreateContext(String contextType)
   at Microsoft.EntityFrameworkCore.Design.Internal.MigrationsOperations.AddMigration(String name, String outputDir, String contextType)
   at Microsoft.EntityFrameworkCore.Design.OperationExecutor.AddMigrationImpl(String name, String outputDir, String contextType)
   at Microsoft.EntityFrameworkCore.Design.OperationExecutor.OperationBase.<>c__DisplayClass3_0`1.<Execute>b__0()
   at Microsoft.EntityFrameworkCore.Design.OperationExecutor.OperationBase.Execute(Action action)
No suitable constructor found for entity type 'PostgisPoint'. The following parameters could not be bound to properties of the entity: 'x', 'y'.

[roji]

Can you please post some details on what triggered this? A minimal dbcontext + code would be great.

[lust4life]

maybe use postgisgeometry as the point type, or use a implicit constructor ?

https://docs.microsoft.com/en-us/ef/core/modeling/constructors
dotnet/efcore#10789

[PMExtra]

https://github.com/PMExtra/NpgsqlConstructorBugDemo
There is a demo.

[PMExtra]

The class PostgisPoint doesn't have parameterless constructor.
But previous versions works fine with it.

[roji]

Version 2.1.0 introduced support for NetTopologySuite as a way to access PostGIS types - it's a full-blown spatial library with more powerful types, and which also has spatial operations which Npgsql translates to PostGIS functions.

Unfortunately support for the legacy PostGIS types (e.g. PostgisPoint) was dropped from the EF Core provider, at least for now (note that at the ADO level support is still there).

Am going to close this issue for now (especially as no code sample was provided), but will consider reopening if there's a good reason to bring the legacy types to EF Core (and if more detail is added about this specific issue).

[summershrimp]

@roji sample below: https://github.com/PMExtra/NpgsqlConstructorBugDemo

[danieldiazastudillo]

Just by adding a default (empty) constructor for some entities the error stops showing. Very weird. Any explanation for this?