Reputation: 382
I am trying to list some food items with a controller. I use Repository pattern with UnitOfWork for the data in another assembly and referenced it in a BaseApiController. The Data property is my UnitOfWork instance.
var result = Data.Food
.FindAll()
.Select(FoodItemViewModel.Create);
return result;
and here is my ViewModel:
public static Expression<Func<FoodItem, FoodItemViewModel>> Create
{
get
{
return fi => new FoodItemViewModel
{
Id = fi.Id,
Description = fi.Description,
DiaryEntries = fi.DiaryEntries
.Select(s => new DiaryEntityViewModel()
{
Id = s.Id,
Quantity = s.Quantity
}
};
}
}
But all I get is:
"The specified type member 'DiaryEntries' is not supported in LINQ to Entities. Only initializers, entity members, and entity navigation properties are supported."
My DiaryEntries member in the ViewModel is
IEnumerable<DiaryEntityViewModel>
and my DiaryEntries member in the Data instance is
IRepository<DiaryEntry>
and DiaryEntry is my model class
and here is my FoodItem model class:
public class FoodItem
{
private IEnumerable<Measure> measures;
private IEnumerable<DiaryEntry> diaryEntries;
public FoodItem()
{
this.measures = new HashSet<Measure>();
this.diaryEntries = new HashSet<DiaryEntry>();
}
public int Id { get; set; }
public string Description { get; set; }
public virtual IEnumerable<DiaryEntry> DiaryEntries
{
get
{
return this.diaryEntries;
}
set
{
this.diaryEntries = value;
}
}
public virtual IEnumerable<Measure> Measures
{
get
{
return this.measures;
}
set
{
this.measures = value;
}
}
}
Upvotes: 3
Views: 1054
Reputation: 2361
Change you FoodItem
class to the one below, IEnumerable<T>
is not supported as a type for a navigation collection :
public class FoodItem
{
public FoodItem()
{
this.Measures = new HashSet<Measure>();
this.DiaryEntries = new HashSet<DiaryEntry>();
}
public int Id { get; set; }
public string Description { get; set; }
public virtual ICollection<DiaryEntry> DiaryEntries
{
get;
set;
}
public virtual ICollection<Measure> Measures
{
get;
set;
}
}
Upvotes: 1