I have a pretty simple console project with an entity model (containing two simple entities), two handmade POCOs and a handmade Context class. The program fires a simple query against the DB and everything including LazyLoading works fine.
The problem: As soon as i add another Entity data model (even if i add an empty one), the calls to CreateObjectSet in Ef2PlaygroundModel_3Container throw the following exception:
Unhandled Exception: System.InvalidOperationException: Mapping and metadata information could not be found for EntityType 'EF2_Playground.Driver'.
at System.Data.Objects.ObjectContext.GetTypeUsage(Type entityCLRType)
at System.Data.Objects.ObjectContext.GetEntitySetFromContainer(EntityContainer container, Type entityCLRType, String exceptionParameterName)
at System.Data.Objects.ObjectContext.GetEntitySetForType(Type entityCLRType, String exceptionParameterName)
at System.Data.Objects.ObjectContext.CreateObjectSet[TEntity]()
at EF2_Playground.Ef2PlaygroundModel_3Container.get_Drivers() in C:\...\Ef2PlaygroundModel_3Pocos.cs:line 64
at EF2_Playground.Program.Main(String[] args) in C:\...\Program.cs:line 15
Does anyone have an idea about what is going wrong here?
That is the working project:
Ef2PlaygroundModel_3.edmx:
Code Generation Strategy is set to “None”
<?xml version="1.0" encoding="utf-8"?>
<edmx:Edmx Version="2.0" xmlns:edmx="http://schemas.microsoft.com/ado/2008/10/edmx">
<!-- EF Runtime content -->
<edmx:Runtime>
<!-- SSDL content -->
<edmx:StorageModels>
<Schema Namespace="Ef2PlaygroundModel_3.Store" Alias="Self" Provider="System.Data.SqlClient" ProviderManifestToken="2008" xmlns:store="http://schemas.microsoft.com/ado/2007/12/edm/EntityStoreSchemaGenerator" xmlns="http://schemas.microsoft.com/ado/2009/02/edm/ssdl">
<EntityContainer Name="Ef2PlaygroundModel_3StoreContainer">
<EntitySet Name="Cars" EntityType="Ef2PlaygroundModel_3.Store.Cars" store:Type="Tables" Schema="dbo"/>
<EntitySet Name="Drivers" EntityType="Ef2PlaygroundModel_3.Store.Drivers" store:Type="Tables" Schema="dbo"/>
<EntitySet Name="CarDriver" EntityType="Ef2PlaygroundModel_3.Store.CarDriver" store:Type="Tables" Schema="dbo"/>
<AssociationSet Name="FK_CarDriver_Car" Association="Ef2PlaygroundModel_3.Store.FK_CarDriver_Car">
<End Role="Car" EntitySet="Cars"/>
<End Role="CarDriver" EntitySet="CarDriver"/>
</AssociationSet>
<AssociationSet Name="FK_CarDriver_Driver" Association="Ef2PlaygroundModel_3.Store.FK_CarDriver_Driver">
<End Role="Driver" EntitySet="Drivers"/>
<End Role="CarDriver" EntitySet="CarDriver"/>
</AssociationSet>
</EntityContainer>
<EntityType Name="Cars">
<Key>
<PropertyRef Name="Id"/>
</Key>
<Property Name="Id" Type="int" StoreGeneratedPattern="Identity" Nullable="false"/>
<Property Name="Brand" Type="nvarchar(max)" Nullable="false"/>
<Property Name="Model" Type="nvarchar(max)" Nullable="false"/>
<Property Name="ReleaseDate" Type="datetime" Nullable="true"/>
</EntityType>
<EntityType Name="Drivers">
<Key>
<PropertyRef Name="Id"/>
</Key>
<Property Name="Id" Type="int" StoreGeneratedPattern="Identity" Nullable="false"/>
<Property Name="Name" Type="nvarchar(max)" Nullable="false"/>
</EntityType>
<EntityType Name="CarDriver">
<Key>
<PropertyRef Name="Cars_Id"/>
<PropertyRef Name="Drivers_Id"/>
</Key>
<Property Name="Cars_Id" Type="int" Nullable="false"/>
<Property Name="Drivers_Id" Type="int" Nullable="false"/>
</EntityType>
<Association Name="FK_CarDriver_Car">
<End Role="Car" Type="Ef2PlaygroundModel_3.Store.Cars" Multiplicity="1"/>
<End Role="CarDriver" Type="Ef2PlaygroundModel_3.Store.CarDriver" Multiplicity="*"/>
<ReferentialConstraint>
<Principal Role="Car">
<PropertyRef Name="Id"/>
</Principal>
<Dependent Role="CarDriver">
<PropertyRef Name="Cars_Id"/>
</Dependent>
</ReferentialConstraint>
</Association>
<Association Name="FK_CarDriver_Driver">
<End Role="CarDriver" Type="Ef2PlaygroundModel_3.Store.CarDriver" Multiplicity="*"/>
<End Role="Driver" Type="Ef2PlaygroundModel_3.Store.Drivers" Multiplicity="1"/>
<ReferentialConstraint>
<Principal Role="Driver">
<PropertyRef Name="Id"/>
</Principal>
<Dependent Role="CarDriver">
<PropertyRef Name="Drivers_Id"/>
</Dependent>
</ReferentialConstraint>
</Association>
</Schema>
</edmx:StorageModels>
<!-- CSDL content -->
<edmx:ConceptualModels>
<Schema xmlns="http://schemas.microsoft.com/ado/2008/09/edm" xmlns:cg="http://schemas.microsoft.com/ado/2006/04/codegeneration" xmlns:store="http://schemas.microsoft.com/ado/2007/12/edm/EntityStoreSchemaGenerator" Namespace="Ef2PlaygroundModel_3" Alias="Self" xmlns:annotation="http://schemas.microsoft.com/ado/2009/02/edm/annotation">
<EntityContainer Name="Ef2PlaygroundModel_3Container" annotation:LazyLoadingEnabled="true">
<EntitySet Name="Cars" EntityType="Ef2PlaygroundModel_3.Car"/>
<EntitySet Name="Drivers" EntityType="Ef2PlaygroundModel_3.Driver"/>
<AssociationSet Name="CarDriver" Association="Ef2PlaygroundModel_3.CarDriver">
<End Role="Car" EntitySet="Cars"/>
<End Role="Driver" EntitySet="Drivers"/>
</AssociationSet>
</EntityContainer>
<EntityType Name="Car">
<Key>
<PropertyRef Name="Id"/>
</Key>
<Property Type="Int32" Name="Id" Nullable="false" annotation:StoreGeneratedPattern="Identity"/>
<Property Type="String" Name="Brand" Nullable="false"/>
<Property Type="String" Name="Model" Nullable="false"/>
<Property Type="DateTime" Name="ReleaseDate" Nullable="true"/>
<NavigationProperty Name="Drivers" Relationship="Ef2PlaygroundModel_3.CarDriver" FromRole="Car" ToRole="Driver"/>
</EntityType>
<EntityType Name="Driver">
<Key>
<PropertyRef Name="Id"/>
</Key>
<Property Type="Int32" Name="Id" Nullable="false" annotation:StoreGeneratedPattern="Identity"/>
<Property Type="String" Name="Name" Nullable="false"/>
<NavigationProperty Name="Cars" Relationship="Ef2PlaygroundModel_3.CarDriver" FromRole="Driver" ToRole="Car"/>
</EntityType>
<Association Name="CarDriver">
<End Type="Ef2PlaygroundModel_3.Car" Role="Car" Multiplicity="*"/>
<End Type="Ef2PlaygroundModel_3.Driver" Role="Driver" Multiplicity="*"/>
</Association>
</Schema>
</edmx:ConceptualModels>
<!-- C-S mapping content -->
<edmx:Mappings>
<Mapping Space="C-S" xmlns="http://schemas.microsoft.com/ado/2008/09/mapping/cs">
<EntityContainerMapping StorageEntityContainer="Ef2PlaygroundModel_3StoreContainer" CdmEntityContainer="Ef2PlaygroundModel_3Container">
<EntitySetMapping Name="Cars">
<EntityTypeMapping TypeName="IsTypeOf(Ef2PlaygroundModel_3.Car)">
<MappingFragment StoreEntitySet="Cars">
<ScalarProperty Name="Id" ColumnName="Id"/>
<ScalarProperty Name="Brand" ColumnName="Brand"/>
<ScalarProperty Name="Model" ColumnName="Model"/>
<ScalarProperty Name="ReleaseDate" ColumnName="ReleaseDate"/>
</MappingFragment>
</EntityTypeMapping>
</EntitySetMapping>
<EntitySetMapping Name="Drivers">
<EntityTypeMapping TypeName="IsTypeOf(Ef2PlaygroundModel_3.Driver)">
<MappingFragment StoreEntitySet="Drivers">
<ScalarProperty Name="Id" ColumnName="Id"/>
<ScalarProperty Name="Name" ColumnName="Name"/>
</MappingFragment>
</EntityTypeMapping>
</EntitySetMapping>
<AssociationSetMapping Name="CarDriver" TypeName="Ef2PlaygroundModel_3.CarDriver" StoreEntitySet="CarDriver">
<EndProperty Name="Car">
<ScalarProperty Name="Id" ColumnName="Cars_Id"/>
</EndProperty>
<EndProperty Name="Driver">
<ScalarProperty Name="Id" ColumnName="Drivers_Id"/>
</EndProperty>
</AssociationSetMapping>
</EntityContainerMapping>
</Mapping>
</edmx:Mappings>
</edmx:Runtime>
<!-- EF Designer content (DO NOT EDIT MANUALLY BELOW HERE) -->
<edmx:Designer xmlns="http://schemas.microsoft.com/ado/2008/10/edmx">
<edmx:Connection>
<DesignerInfoPropertySet>
<DesignerProperty Name="MetadataArtifactProcessing" Value="EmbedInOutputAssembly"/>
</DesignerInfoPropertySet>
</edmx:Connection>
<edmx:Options>
<DesignerInfoPropertySet>
<DesignerProperty Name="ValidateOnBuild" Value="true"/>
<DesignerProperty Name="EnablePluralization" Value="False"/>
<DesignerProperty Name="CodeGenerationStrategy" Value="None"/>
</DesignerInfoPropertySet>
</edmx:Options>
<!-- Diagram content (shape and connector positions) -->
<edmx:Diagrams>
<Diagram Name="Ef2PlaygroundModel_3">
<EntityTypeShape EntityType="Ef2PlaygroundModel_3.Car" Width="1.5" PointX="3.25" PointY="1.625" Height="1.787985026041667"/>
<EntityTypeShape EntityType="Ef2PlaygroundModel_3.Driver" Width="1.5" PointX="5.375" PointY="1.625" Height="1.59568359375"/>
<AssociationConnector Association="Ef2PlaygroundModel_3.CarDriver">
<ConnectorPoint PointX="4.75" PointY="2.422841796875"/>
<ConnectorPoint PointX="5.375" PointY="2.422841796875"/>
</AssociationConnector>
</Diagram>
</edmx:Diagrams>
</edmx:Designer>
</edmx:Edmx>
app.config:
<configuration>
<connectionStrings>
<add
name="Ef2PlaygroundModel_3Container"
connectionString="metadata=res://*/Ef2PlaygroundModel_3.csdl|res://*/Ef2PlaygroundModel_3.ssdl|res://*/Ef2PlaygroundModel_3.msl;provider=System.Data.SqlClient;provider connection string="Data Source=.\SqlExpress;Initial Catalog=Ef2PlaygroundModel_3;Integrated Security=True;MultipleActiveResultSets=True""
providerName="System.Data.EntityClient"
/>
</connectionStrings>
</configuration>
Ef2PlaygroundModel_3Pocos.cs:
using System;
using System.Collections.Generic;
using System.Data.Objects;
namespace EF2_Playground
{
public class Car
{
public Car()
{
Drivers = new List<Driver>();
}
public int Id { get; set; }
public string Brand { get; set; }
public string Model { get; set; }
public DateTime? ReleaseDate { get; set; }
public virtual List<Driver> Drivers { get; private set; }
}
public class Driver
{
public Driver()
{
Cars = new List<Car>();
}
public int Id { get; set; }
public string Name { get; set; }
public virtual List<Car> Cars { get; private set; }
}
public class Ef2PlaygroundModel_3Container : ObjectContext
{
public Ef2PlaygroundModel_3Container()
: base("name=Ef2PlaygroundModel_3Container")
{
ContextOptions.LazyLoadingEnabled = true;
}
public IObjectSet<Car> Cars
{
get { return CreateObjectSet<Car>(); }
}
public IObjectSet<Driver> Drivers
{
get { return CreateObjectSet<Driver>(); }
}
}
}
Program.cs:
using System;
namespace EF2_Playground
{
class Program
{
static void Main(string[] args)
{
using (var ctx = new Ef2PlaygroundModel_3Container())
{
foreach (var driver in ctx.Drivers)
{
Console.WriteLine(driver.Name);
foreach (var car in driver.Cars)
{
Console.WriteLine(" drives a {0} - {1} (released on {2})", car.Brand, car.Model, car.ReleaseDate);
}
}
}
}
}
}
And finally Model1.edmx that breaks the whole thing as soon as i add it to the project:
<?xml version="1.0" encoding="utf-8"?>
<edmx:Edmx Version="2.0" xmlns:edmx="http://schemas.microsoft.com/ado/2008/10/edmx">
<!-- EF Runtime content -->
<edmx:Runtime>
<!-- SSDL content -->
<edmx:StorageModels>
<Schema xmlns="http://schemas.microsoft.com/ado/2009/02/edm/ssdl" Namespace="Model1.Store" Alias="Self" Provider="System.Data.SqlClient" ProviderManifestToken="2005">
<EntityContainer Name="Model1TargetContainer">
</EntityContainer>
</Schema>
</edmx:StorageModels>
<!-- CSDL content -->
<edmx:ConceptualModels>
<Schema xmlns="http://schemas.microsoft.com/ado/2008/09/edm" xmlns:cg="http://schemas.microsoft.com/ado/2006/04/codegeneration" xmlns:store="http://schemas.microsoft.com/ado/2007/12/edm/EntityStoreSchemaGenerator" Namespace="Model1" Alias="Self" xmlns:annotation="http://schemas.microsoft.com/ado/2009/02/edm/annotation">
<EntityContainer Name="Model1Container" annotation:LazyLoadingEnabled="true">
</EntityContainer>
</Schema>
</edmx:ConceptualModels>
<!-- C-S mapping content -->
<edmx:Mappings>
<Mapping xmlns="http://schemas.microsoft.com/ado/2008/09/mapping/cs" Space="C-S">
<Alias Key="Model" Value="Model1"/>
<Alias Key="Target" Value="Model1.Store"/>
<EntityContainerMapping CdmEntityContainer="Model1Container" StorageEntityContainer="Model1TargetContainer">
</EntityContainerMapping>
</Mapping>
</edmx:Mappings>
</edmx:Runtime>
<!-- EF Designer content (DO NOT EDIT MANUALLY BELOW HERE) -->
<edmx:Designer xmlns="http://schemas.microsoft.com/ado/2008/10/edmx">
<edmx:Connection>
<DesignerInfoPropertySet>
<DesignerProperty Name="MetadataArtifactProcessing" Value="EmbedInOutputAssembly"/>
</DesignerInfoPropertySet>
</edmx:Connection>
<edmx:Options>
<DesignerInfoPropertySet>
<DesignerProperty Name="ValidateOnBuild" Value="true"/>
<DesignerProperty Name="EnablePluralization" Value="False"/>
</DesignerInfoPropertySet>
</edmx:Options>
<!-- Diagram content (shape and connector positions) -->
<edmx:Diagrams>
<Diagram Name="Model1"/>
</edmx:Diagrams>
</edmx:Designer>
</edmx:Edmx>
Ok, i guess i’ve got it. I reduced the second model (the one that brakes the project) to the following:
Class1.cs
Bang! The well known exception appears.
As in so many cases, reading the documentation helps:
Sure, i do not literally add mapping attributes to CUSTOM data classes but that doesn’t matter for the EdmSchemaAttribute since that one lives on the assembly level.
Adding the second non-POCO model causes code generation resulting in a class that contains (at least) the EdmSchemaAttribute and that is not supported.
What i’ve learned: Don’t mix POCO and non-POCO models in one assembly.