The entity cannot be constructed in a LINQ to Entities query

Question

There is an entity type called Product that is generated by entity framework. I have written this query

public IQueryable GetProdu         


        

Answer 1

You can solve this by using Data Transfer Objects (DTO's).

These are a bit like viewmodels where you put in the properties you need and you can map them manually in your controller or by using third-party solutions like AutoMapper.

With DTO's you can :

• Make data serialisable (Json)
• Get rid of circular references
• Reduce networktraffic by leaving properties you don't need (viewmodelwise)
• Use objectflattening

I've been learning this in school this year and it's a very useful tool.