EF4. Add a object with relationship causes full table select

Posted by Fujiy on Stack Overflow See other posts from Stack Overflow or by Fujiy
Published on 2010-05-21T01:27:03Z Indexed on 2010/05/21 1:30 UTC
Read the original article Hit count: 312

Filed under:

entity-framework

|

LINQ

|

linq-to-entities

Ex 1:

"autor.ComentariosWorkItens.Add(comentarioWorkItem);"

autor.ComentariosWorkItens makes EF4 load all ComentariosWorkItens.

Ex 2:

comentarioWorkItem.Usuario = autor;

Fixup make EF load all ComentariosWorkItens too:

    private void FixupUsuario(Usuario previousValue)
    {
        if (previousValue != null && previousValue.ComentariosWorkItens.Contains(this))
        {
            previousValue.ComentariosWorkItens.Remove(this);
        }

        if (Usuario != null)
        {
            if (!Usuario.ComentariosWorkItens.Contains(this))
            {
                Usuario.ComentariosWorkItens.Add(this);
            }
        }
    }

How can I prevent this?

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