Similar Questions
The entity type <classname> is not part of the model for the current context -and- EF 4.1 Code First error - The entity type SomeType is not part of the model for the current context are similar questions but they are "code first" perspective only, with much simpler data models, and address connection string and mapping issues. Please look closely at this one.
Symptom
// HomeController.cs
public ActionResult Index()
{
var _db = new MealsContext();
var m = _db.Meals.ToList();
var d = _db.Drinks.ToList();
return View();
}
Exception is thrown retrieving the Drinks collection:
The entity type Drink is not part of the model for the current context.
Code
// Meal.cs
public class Meal
{
public int Id { get; set; }
public string Stuff { get; set; }
public virtual ICollection<Meat> Meats { get; set; }
public virtual ICollection<Vegetable> Vegetables { get; set; }
}
// Meat.cs
public class Meat
{
public int Id { get; set; }
public string Name { get; set; }
public int MealId { get; set; }
}
// Vegetable.cs
public class Vegetable
{
public int Id { get; set; }
public string Name { get; set; }
public int MealId { get; set; }
}
// Drink.cs
public class Drink
{
public int Id { get; set; }
public string Name { get; set; }
}
Yes, I know in the real world the relationship between Meat and Vegetable with Meals would likely be Many-to-Many but don't get hung up on it here.
// MealsContext.cs
public class MealsContext: DbContext
{
public MealsContext() : base("ConnectionString")
public DbSet<Meal> Meals{ get; set; }
public DbSet<Meat> Meats{ get; set; }
public DbSet<Vegetable> Vegetables { get; set; }
public DbSet<Drink> Drinks{ get; set; }
}
My experience was in using a Model First methodology. The EDMX file was built then the POCOs.
In the connection string is the metadata section that maps to the parsed EDMX resources (metadata=res://*/Models.MealsModels.csdl|res://*/Models.MealsModels.ssdl|res://*/Models.MealsModels.msl;).
I examined the underlying XML of the EDMX file shows all entities present in Conceptual and Store models, and all are fully mapped. WTF?
Troubleshooting
The first tried was to completely get rid of the store and mapping EDMX data (the SSDL and MSL sections). Fire away, and now there are two exceptions:
Retrieving Meals throws MSL, error 2062 No mapping specified for instance of the EntitySet and AssociationSet in the EntityContainer.
Retrieving Drinks continues to throw The entity type Drinkis not part of the model for the current context.
The error thrown by Meals is expected, I nuked the mappings and store model -- examining _db shows me that Meals -> InternalSet -> EntitySet property is correct, just not mapped.
The error thrown by Drinks is where I am stuck. Examining _db closer shows me that Drinks -> InternalSet -> EntitySet throws the SystemInvalidOperation exception that states the entity is not in the model context.
Here's what the EDMX's CSDL looks like in XML format:
<edmx:ConceptualModels>
<Schema ...>
<EntityContainer Name="MealsContext" annotation:LazyLoadingEnabled="true">
<EntitySet Name="Meals" EntityType="Models.Meal" />
<EntitySet Name="Meats" EntityType="Models.Meat" />
<EntitySet Name="Vegetables" EntityType="Models.Vegetable" />
<EntitySet Name="Drinks" EntityType="Models.Drink" />
<!-- AssociationSets here for the FKs -->
</EntityContainer>
<!-- All are present, but here's the culprit Drink -->
<EntityType Name="Drink">
<Key>
<PropertyRef Name="Id" />
</Key>
<Property Type="Int32" Name="Id" Nullable="false" annotation:StoreGeneratedPattern="Identity" />
<Property Type="String" Name="Name" Nullable="false" MaxLength="200" FixedLength="false" Unicode="true" />
</EntityType>
<!-- Associations here -->
</Schema>
</edmx:ConceptualModels>
Question
If the DbContext has all the DbSet properties and is consuming a connection string that includes metadata for a model who's CSDL correctly defines the entity type Drink, why in the hell is it not part of the context?
The only thing different about Drink that I can see is that it is not related to any other entities, and has no associations...
See Question&Answers more detail:
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