private static bool CanAcceptModelClassAsSource(ModelClass candidate)
{
// valid unidirectional associations:
// EF6 - entity to entity, entity to dependent
// EFCore - entity to entity, entity to dependent
// EFCore5Plus - entity to entity, entity to dependent, dependent to dependent, keyless to entity
ModelRoot modelRoot = candidate.ModelRoot;
EFVersion entityFrameworkVersion = modelRoot.EntityFrameworkVersion;
if (entityFrameworkVersion == EFVersion.EF6)
{
if (candidate.IsEntity())
{
return(true);
}
}
else if (entityFrameworkVersion == EFVersion.EFCore && !modelRoot.IsEFCore5Plus)
{
if (candidate.IsEntity())
{
return(true);
}
}
else if (entityFrameworkVersion == EFVersion.EFCore && modelRoot.IsEFCore5Plus)
{
if (candidate.IsEntity())
{
return(true);
}
if (candidate.IsDependent())
{
return(true);
}
if (candidate.IsKeyless())
{
return(true);
}
}
return(false);
}
private static bool CanAcceptModelClassAndModelClassAsSourceAndTarget(ModelClass sourceModelClass, ModelClass targetModelClass)
{
// keyless types may not have navigations to owned entities
if (sourceModelClass.IsKeyless() && targetModelClass.IsDependent())
{
return(false);
}
// navigation properties can't point to keyless entity types
if (targetModelClass.IsKeyless())
{
return(false);
}
// valid unidirectional associations:
// EF6 - entity to entity, entity to dependent
// EFCore - entity to entity, entity to dependent
// EFCore5Plus - entity to entity, entity to dependent, dependent to dependent, keyless to entity
ModelRoot modelRoot = sourceModelClass.ModelRoot;
if (modelRoot.EntityFrameworkVersion == EFVersion.EF6)
{
if (sourceModelClass.IsEntity() && targetModelClass.IsEntity())
{
return(true);
}
if (sourceModelClass.IsEntity() && targetModelClass.IsDependent())
{
return(true);
}
}
else if (modelRoot.EntityFrameworkVersion == EFVersion.EFCore && !modelRoot.IsEFCore5Plus)
{
if (sourceModelClass.IsEntity() && targetModelClass.IsEntity())
{
return(true);
}
if (sourceModelClass.IsEntity() && targetModelClass.IsDependent())
{
return(true);
}
}
else if (modelRoot.EntityFrameworkVersion == EFVersion.EFCore && modelRoot.IsEFCore5Plus)
{
if (sourceModelClass.IsEntity() && targetModelClass.IsEntity())
{
return(true);
}
if (sourceModelClass.IsEntity() && targetModelClass.IsDependent())
{
return(true);
}
if (sourceModelClass.IsDependent() && targetModelClass.IsDependent())
{
return(true);
}
if (sourceModelClass.IsKeyless() && targetModelClass.IsEntity())
{
return(true);
}
}
return(false);
}
