Question

Inside of my model I have an attribute called attributes that its value is taken from the cutomized_attributes in my Database the property attributes does Not exist in the Database its just calculated value, while I’m trying to do the following I’m facing this error:

Error: System.Data.Entity.Edm.EdmEntityType: : EntityType ‘JToken’ has no key defined. Define the key for this EntityType

Model:

public class Restaurant
{
    public int id{ get; set; }
    public string  name{ get; set; }
    public string cutomized_attributes { get; set; }
    private JObject _attributes { get; set; }
    public JObject attributes
    {
        get
        {
            if (this._attributes == null)
                return this._attributes = RestaurantAttributes.parseAttrString(this.cutomized_attributes);
            return this._attributes;
        }
        set
        {
            this._attributes = value;
        }
    }

}

Answer 1

assuming you are using code first… within the dbcontext subclass

protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
     modelBuilder.Entity<Restaurant>().Ignore(x => x.attributes);
}