I'm having some issues building my database. I have this two hbm mappings:
<class name="br.unicamp.iel.model.Module" table="readinweb_modules">
<id name="id" type="java.lang.Long">
<generator class="increment" />
</id>
<many-to-one name="course" class="br.unicamp.iel.model.Course"
column="course_id" fetch="select" />
<property name="position" type="integer" />
<property name="module_grammar" type="text" />
</class>
<class name="br.unicamp.iel.model.Course" table="readinweb_courses">
<id name="id" type="java.lang.Long">
<generator class="increment" />
</id>
<property name="title" length="255" not-null="true" type="string" />
<property name="idiom" length="255" not-null="true" type="string" />
<property name="description" type="text" />
<set name="courseModules" table="readinweb_modules"
inverse="true" lazy="true" fetch="select">
<key column="id" not-null="true" />
<one-to-many class="br.unicamp.iel.model.Module" />
</set>
</class>
and when I try to access data on my logic bean as:
List modules = new ArrayList(dao.findById(Course.class,
course).getCourseModules());
it gives me a
org.hibernate.LazyInitializationException: failed to lazily initialize
a collection of role: br.unicamp.iel.model.Course.courseModules, no
session or session was closed
We need to see the complete code of the
List modules = new ArrayList(dao.findById(Course.class, course).getCourseModules())
Do you open and close a Session (or a EntityManager) inside the dao.findById method? The session must still be open to resolve lazy relationships
Related
I need some help as I'm stumped on an Hibernate 4/Struts 2 project. This is my first Hibernate 4 (4.3.11) project, as I worked for years with Hibernate 3. The database is MySQL 5.
All mapping classes were produced with Hibernate Tools provided by JBoss Tools 4.3.5, on Eclipse Mars 2. No problem was encountered, it worked fine.
But when testing, I faced this exception :
2017-02-16 17:23:45 ERROR Dispatcher:38 - Exception occurred during processing request: metier.Ville_$$_javassist_2 cannot be cast to javassist.util.proxy.Proxy
java.lang.ClassCastException: metier.Ville_$$_javassist_2 cannot be cast to javassist.util.proxy.Proxy
at org.hibernate.proxy.pojo.javassist.JavassistLazyInitializer.getProxy(JavassistLazyInitializer.java:147)
at org.hibernate.proxy.pojo.javassist.JavassistProxyFactory.getProxy(JavassistProxyFactory.java:75)
at org.hibernate.tuple.entity.AbstractEntityTuplizer.createProxy(AbstractEntityTuplizer.java:771)
I read that post but I don't understand what's happening.
Two classes are involved : Salle and Ville. Here's the Hibernate XML files : Salle.hbm.xml & Ville.hbm.xml
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">
<!-- Generated 2 f?vr. 2017 11:28:16 by Hibernate Tools 4.3.5.Final -->
<hibernate-mapping>
<class name="metier.Salle" table="salle" catalog="aevbadherents" optimistic-lock="version">
<id name="idSalle" type="int">
<column name="idSALLE" />
<generator class="assigned" />
</id>
<many-to-one name="ville" class="metier.Ville" fetch="select">
<column name="idVilleSalle" />
</many-to-one>
<property name="adresse1" type="string">
<column name="Adresse1" length="80" />
</property>
<property name="adresse2" type="string">
<column name="Adresse2" length="80" />
</property>
<property name="description" type="string">
<column name="Description" length="500" />
</property>
<set name="courses" table="cours" inverse="true" lazy="true" fetch="select">
<key>
<column name="IdSalle" not-null="true" />
</key>
<one-to-many class="metier.Cours" />
</set>
<set name="passagegrades" table="passagegrade" inverse="true" lazy="true" fetch="select">
<key>
<column name="IdSalle" />
</key>
<one-to-many class="metier.Passagegrade" />
</set>
</class>
</hibernate-mapping>
The second file :
<hibernate-mapping>
<class name="metier.Ville" table="ville" catalog="aevbadherents" optimistic-lock="version">
<id name="idVille" type="int">
<column name="idVILLE" />
<generator class="assigned" />
</id>
<many-to-one name="departement" class="metier.Departement" fetch="select">
<column name="idDepartement" not-null="true" />
</many-to-one>
<property name="nom" type="string">
<column name="Nom" length="60" not-null="true" />
</property>
<property name="codepostal" type="string">
<column name="codepostal" length="6" not-null="true" />
</property>
<property name="gpslat" type="string">
<column name="GPSLat" length="12" not-null="true" />
</property>
<property name="gpslon" type="string">
<column name="GPSLon" length="12" not-null="true" />
</property>
<set name="adherentsForIdVilleResid" table="adherent" inverse="true" lazy="true" fetch="select">
<key>
<column name="IdVilleResid" />
</key>
<one-to-many class="metier.Adherent" />
</set>
<set name="clubs" table="club" inverse="true" lazy="true" fetch="select">
<key>
<column name="idville" not-null="true" />
</key>
<one-to-many class="metier.Club" />
</set>
<set name="salles" table="salle" inverse="true" lazy="true" fetch="select">
<key>
<column name="idVilleSalle" />
</key>
<one-to-many class="metier.Salle" />
</set>
<set name="adherentsForIdVilleNais" table="adherent" inverse="true" lazy="true" fetch="select">
<key>
<column name="IdVilleNais" />
</key>
<one-to-many class="metier.Adherent" />
</set>
</class>
</hibernate-mapping>
I read that this exception may be caused by a JAR conflict, but I did not find anything.I don't use Maven (maybe I should ?), so let me show you the JARs included :
antlr-2.7.7.jar
commons-fileupload-1.3.jar
commons-io-2.0.1.jar
commons-lang3-3.1.jar
commons-logging-1.2-javadoc.jar
commons-logging-1.2.jar
dom4j-1.6.1.jar
freemarker-2.3.19.jar
hibernate-commons-annotations-4.0.5.Final.jar
hibernate-core-4.3.11.Final.jar
hibernate-jpa-2.1-api-1.0.0.Final.jar
jandex-1.1.0.Final.jar
javassist-3.18.1-GA.jar
jboss-logging-3.1.3.GA.jar
jboss-logging-annotations-1.2.0.Beta1.jar
jboss-transaction-api_1.2_spec-1.0.0.Final.jar
log4j-1.2.15.jar
mysql-connector-java-5.1.40-bin.jar
ognl-3.0.6.jar
struts2-core-2.3.15.3.jar
truc.txt
xwork-core-2.3.15.3.jar
Please help me, as I'm stumped...
One of the possible cause for this problem is that you have in your classpath several versions of the same class.
I have been looking in java2s.com and, none of the jar you listed, seems to contain the class javassist.util.proxy.Proxy, so I will try to find if any other jar contains that class using jarscan with the following command:
jarscan -d PATH_TO_YOUR_CLASSPATH_DIR -j javassist.util.proxy.Proxy
You can download jarscan from here https://java.net/projects/jarscan/downloads
If you found that several packages contains the same class, you are done.
Malaguna,
Thanks for your help. Here's the result of jarscan :
D:\temp\java\jarscan>jarscan -j javassist.util.proxy.Proxy
......................
+javassist-3.18.1-GA.jar
javassist-3.18.1-GA.jar\javassist/util/proxy/Proxy.class
javassist-3.18.1-GA.jar\javassist/util/proxy/ProxyFactory$1.class
javassist-3.18.1-GA.jar\javassist/util/proxy/ProxyFactory$2.class
javassist-3.18.1-GA.jar\javassist/util/proxy/ProxyFactory$3.class
javassist-3.18.1-GA.jar\javassist/util/proxy/ProxyFactory$ClassLoaderProvide
r.class
javassist-3.18.1-GA.jar\javassist/util/proxy/ProxyFactory$Find2MethodsArgs.c
lass
javassist-3.18.1-GA.jar\javassist/util/proxy/ProxyFactory$ProxyDetails.class
javassist-3.18.1-GA.jar\javassist/util/proxy/ProxyFactory$UniqueName.class
javassist-3.18.1-GA.jar\javassist/util/proxy/ProxyFactory.class
javassist-3.18.1-GA.jar\javassist/util/proxy/ProxyObject.class
javassist-3.18.1-GA.jar\javassist/util/proxy/ProxyObjectInputStream.class
javassist-3.18.1-GA.jar\javassist/util/proxy/ProxyObjectOutputStream.class
----------------------------------------------
Scanned archives: 22
Errors: 0
Archives with hits: 12
So, it means that no other jar contains that class.
I have a Entity Framework 5 Model First project, with the following tables:
Extension
Id : Int32, PK
Number: String
User
Id: Int32, PK
Name: String
UserExtensionMap
UserId : Int32 (FK -> User.Id), PK
ExtensionId : Int32 (FK -> Extension.Id), PK
When setting the above tables and associations to UserExtensionMap I get the error that UserId and ExtensionId are not mapped.
So I right click on UserExtensionMap table and select table mapping and get the following screen
I can set the maps for Users.Id to UserExtensionUser.Id and Extensions.Id to UserExtension.ExtensionId but there is nothing to map the Extensions.Number and User.Username to - I am confused!
I get with the error when trying to compile:
Error 3024: Problem in mapping fragments starting at line 119:Must specify mapping for all key properties (UserExtensionMaps.ExtensionId, UserExtensionMaps.UserId) of the EntitySet UserExtensionMaps.
When i delete these above maps for UserExtensionMap i get the error:
Error 3027: No mapping specified for the following EntitySet/AssociationSet - UserExtensionMaps.
My model XML file is below:
<?xml version="1.0" encoding="utf-8"?>
<edmx:Edmx Version="3.0" xmlns:edmx="http://schemas.microsoft.com/ado/2009/11/edmx">
<!-- EF Runtime content -->
<edmx:Runtime>
<!-- SSDL content -->
<edmx:StorageModels>
<Schema Namespace="Server.Store" Alias="Self" Provider="System.Data.SqlServerCe.4.0" ProviderManifestToken="4.0" xmlns:store="http://schemas.microsoft.com/ado/2007/12/edm/EntityStoreSchemaGenerator" xmlns="http://schemas.microsoft.com/ado/2009/11/edm/ssdl">
<EntityContainer Name="ServerStoreContainer">
<EntitySet Name="Users" EntityType="Server.Store.Users" store:Type="Tables" Schema="dbo" />
<EntitySet Name="Extensions" EntityType="Server.Store.Extensions" store:Type="Tables" Schema="dbo" />
</EntityContainer>
<EntityType Name="Users">
<Key>
<PropertyRef Name="Id" />
</Key>
<Property Name="Id" Type="int" StoreGeneratedPattern="Identity" Nullable="false" />
<Property Name="Username" Type="nvarchar" Nullable="false" />
</EntityType>
<EntityType Name="Extensions">
<Key>
<PropertyRef Name="Id" />
</Key>
<Property Name="Id" Type="int" StoreGeneratedPattern="Identity" Nullable="false" />
<Property Name="Number" Type="nvarchar" Nullable="false" />
</EntityType>
</Schema></edmx:StorageModels>
<!-- CSDL content -->
<edmx:ConceptualModels>
<Schema Namespace="Server" Alias="Self" p1:UseStrongSpatialTypes="false" xmlns:annotation="http://schemas.microsoft.com/ado/2009/02/edm/annotation" xmlns:p1="http://schemas.microsoft.com/ado/2009/02/edm/annotation" xmlns="http://schemas.microsoft.com/ado/2009/11/edm">
<EntityContainer Name="ServerEntities" p1:LazyLoadingEnabled="true" >
<EntitySet Name="Users" EntityType="Server.User" />
<EntitySet Name="Extensions" EntityType="Server.Extension" />
<EntitySet Name="UserExtensionMaps" EntityType="Server.UserExtensionMap" />
<AssociationSet Name="ExtensionUserExtensionMap" Association="Server.ExtensionUserExtensionMap">
<End Role="Extension" EntitySet="Extensions" />
<End Role="UserExtensionMap" EntitySet="UserExtensionMaps" />
</AssociationSet>
<AssociationSet Name="UserUserExtensionMap" Association="Server.UserUserExtensionMap">
<End Role="User" EntitySet="Users" />
<End Role="UserExtensionMap" EntitySet="UserExtensionMaps" />
</AssociationSet>
</EntityContainer>
<EntityType Name="User">
<Key>
<PropertyRef Name="Id" />
</Key>
<Property Type="Int32" Name="Id" Nullable="false" annotation:StoreGeneratedPattern="Identity" />
<Property Type="String" Name="Username" Nullable="false" />
<NavigationProperty Name="UserExtensionMaps" Relationship="Server.UserUserExtensionMap" FromRole="User" ToRole="UserExtensionMap" />
</EntityType>
<EntityType Name="Extension">
<Key>
<PropertyRef Name="Id" />
</Key>
<Property Type="Int32" Name="Id" Nullable="false" annotation:StoreGeneratedPattern="Identity" />
<Property Type="String" Name="Number" Nullable="false" />
<NavigationProperty Name="UserExtensionMaps" Relationship="Server.ExtensionUserExtensionMap" FromRole="Extension" ToRole="UserExtensionMap" />
</EntityType>
<EntityType Name="UserExtensionMap" >
<Key>
<PropertyRef Name="ExtensionId" />
<PropertyRef Name="UserId" />
</Key>
<NavigationProperty Name="Extension" Relationship="Server.ExtensionUserExtensionMap" FromRole="UserExtensionMap" ToRole="Extension" />
<Property Type="Int32" Name="ExtensionId" Nullable="false" />
<NavigationProperty Name="User" Relationship="Server.UserUserExtensionMap" FromRole="UserExtensionMap" ToRole="User" />
<Property Type="Int32" Name="UserId" Nullable="false" />
</EntityType>
<Association Name="ExtensionUserExtensionMap">
<End Type="Server.Extension" Role="Extension" Multiplicity="1" />
<End Type="Server.UserExtensionMap" Role="UserExtensionMap" Multiplicity="*" />
<ReferentialConstraint>
<Principal Role="Extension">
<PropertyRef Name="Id" />
</Principal>
<Dependent Role="UserExtensionMap">
<PropertyRef Name="ExtensionId" />
</Dependent>
</ReferentialConstraint>
</Association>
<Association Name="UserUserExtensionMap">
<End Type="Server.User" Role="User" Multiplicity="1" />
<End Type="Server.UserExtensionMap" Role="UserExtensionMap" Multiplicity="*" />
<ReferentialConstraint>
<Principal Role="User">
<PropertyRef Name="Id" />
</Principal>
<Dependent Role="UserExtensionMap">
<PropertyRef Name="UserId" />
</Dependent>
</ReferentialConstraint>
</Association>
</Schema>
</edmx:ConceptualModels>
<!-- C-S mapping content -->
<edmx:Mappings>
<Mapping Space="C-S" xmlns="http://schemas.microsoft.com/ado/2009/11/mapping/cs">
<EntityContainerMapping StorageEntityContainer="ServerStoreContainer" CdmEntityContainer="ServerEntities">
<EntitySetMapping Name="Users">
<EntityTypeMapping TypeName="IsTypeOf(Server.User)">
<MappingFragment StoreEntitySet="Users">
<ScalarProperty Name="Id" ColumnName="Id" />
<ScalarProperty Name="Username" ColumnName="Username" />
</MappingFragment>
</EntityTypeMapping>
</EntitySetMapping>
<EntitySetMapping Name="Extensions">
<EntityTypeMapping TypeName="IsTypeOf(Server.Extension)">
<MappingFragment StoreEntitySet="Extensions">
<ScalarProperty Name="Id" ColumnName="Id" />
<ScalarProperty Name="Number" ColumnName="Number" />
</MappingFragment>
</EntityTypeMapping>
</EntitySetMapping>
</EntityContainerMapping>
</Mapping></edmx:Mappings>
</edmx:Runtime>
<!-- EF Designer content (DO NOT EDIT MANUALLY BELOW HERE) -->
<Designer xmlns="http://schemas.microsoft.com/ado/2009/11/edmx">
<Connection>
<DesignerInfoPropertySet>
<DesignerProperty Name="MetadataArtifactProcessing" Value="EmbedInOutputAssembly" />
</DesignerInfoPropertySet>
</Connection>
<Options>
<DesignerInfoPropertySet>
<DesignerProperty Name="ValidateOnBuild" Value="true" />
<DesignerProperty Name="EnablePluralization" Value="True" />
<DesignerProperty Name="IncludeForeignKeysInModel" Value="True" />
<DesignerProperty Name="CodeGenerationStrategy" Value="None" />
</DesignerInfoPropertySet>
</Options>
<!-- Diagram content (shape and connector positions) -->
<Diagrams></Diagrams>
</Designer>
</edmx:Edmx>
I could not see the table mapping fields until I generated the database code right click model -> Generate Database from model, after doing this the mappings were OK.
Not sure if this is a bug or not, but it is repeatable and does fix the issue.
I am developing MVC 3 Applicaiton.
I have Model first approch.
I have Company Entity(Abstract).
Lead and Customer is inherited from the company entity.
When I tried to validate the model, Its gives an errror.
Error 41 Error 3023: Problem in mapping fragments starting at line
70:Column Companies.Status in table Companies must be mapped: It has
no default value and is not nullable.
Here is the mapping of tables.
And Here is the EDMX code in HTML View.
<?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="Model1.Store" Alias="Self" Provider="System.Data.SqlClient" ProviderManifestToken="2008" xmlns="http://schemas.microsoft.com/ado/2009/02/edm/ssdl" xmlns:store="http://schemas.microsoft.com/ado/2007/12/edm/EntityStoreSchemaGenerator">
<EntityContainer Name="Model1StoreContainer">
<EntitySet Name="Companies" EntityType="Model1.Store.Companies" store:Type="Tables" Schema="dbo" />
</EntityContainer>
<EntityType Name="Companies">
<Key>
<PropertyRef Name="Id" />
</Key>
<Property Name="Id" Type="int" StoreGeneratedPattern="Identity" Nullable="false" />
<Property Name="Name" Type="nvarchar(max)" Nullable="false" />
<Property Name="Status" Type="nvarchar(max)" Nullable="false" />
<Property Name="__Disc__" Type="nvarchar" MaxLength="Max" Nullable="false" />
</EntityType>
</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">
<EntitySet Name="Companies" EntityType="Model1.Company" />
</EntityContainer>
<EntityType Name="Company" Abstract="true">
<Key>
<PropertyRef Name="Id" />
</Key>
<Property Type="Int32" Name="Id" Nullable="false" annotation:StoreGeneratedPattern="Identity" />
<Property Type="String" Name="Name" Nullable="false" />
</EntityType>
<EntityType Name="Lead" BaseType="Model1.Company" >
<Property Type="String" Name="Status" Nullable="false" />
</EntityType>
</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="Model1StoreContainer" CdmEntityContainer="Model1Container">
<EntitySetMapping Name="Companies">
<EntityTypeMapping TypeName="IsTypeOf(Model1.Company)">
<MappingFragment StoreEntitySet="Companies">
<ScalarProperty Name="Id" ColumnName="Id" />
<ScalarProperty Name="Name" ColumnName="Name" />
<Condition ColumnName="__Disc__" Value="Company" />
</MappingFragment>
</EntityTypeMapping>
<EntityTypeMapping TypeName="Model1.Lead">
<MappingFragment StoreEntitySet="Companies">
<ScalarProperty Name="Id" ColumnName="Id" />
<ScalarProperty Name="Name" ColumnName="Name" />
<ScalarProperty Name="Status" ColumnName="Status" />
<Condition ColumnName="__Disc__" Value="Lead" />
</MappingFragment>
</EntityTypeMapping>
</EntitySetMapping>
</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="True" />
<DesignerProperty Name="DatabaseGenerationWorkflow" Value="$(VSEFTools)\DBGen\Generate T-SQL Via T4 (TPH).xaml" />
</DesignerInfoPropertySet>
</edmx:Options>
<!-- Diagram content (shape and connector positions) -->
<edmx:Diagrams>
<Diagram Name="Model1" >
<EntityTypeShape EntityType="Model1.Company" Width="1.5" PointX="2.375" PointY="0.875" Height="1.2636116536458335" />
<EntityTypeShape EntityType="Model1.Lead" Width="1.5" PointX="3.375" PointY="2.625" Height="1.0992643229166665" />
<InheritanceConnector EntityType="Model1.Lead" >
<ConnectorPoint PointX="3.125" PointY="2.1386116536458335" />
<ConnectorPoint PointX="3.125" PointY="2.325" />
<ConnectorPoint PointX="4.125" PointY="2.325" />
<ConnectorPoint PointX="4.125" PointY="2.625" />
</InheritanceConnector>
</Diagram>
</edmx:Diagrams>
</edmx:Designer>
</edmx:Edmx>
Whats is the issue ?
Put the DefaultValue attribute on the SSDL Status property. It would look like this (I used the empty string):
<Property Name="Status" Type="nvarchar(max)" Nullable="false" DefaultValue=""/>
Since the base entity is abstract you won't be able to create entities of this type so this DefaultValue will not really be used but it should make EF stop complaining.
In your storage model, the Companies.Status column doesn't allow null values.
Since all entities that inherit from Company except the Lead entity will not have the Status property set, you need to either allow null in the Companies.Status column or set a default value to use for the other entities.
I have an insert method on my repository like so:
public T Insert(T entity)
{
_ctx.AddObject(EntityName, entity);
_ctx.SaveChanges();
return entity;
}
If I execute the below code, the values assigned to my entity do not propagate to the SQL that is executed.
Category c = new Category();
c.Name = CLEARANCE;
c = categoryManager.Insert(c);
The SQL should be something like
INSERT INTO Category(Name) VALUES('Clearance')
Instead, the following SQL is being executed
insert [dbo].[Category]([Name])
values (null)
select [Id]
from [dbo].[Category]
where ##ROWCOUNT > 0 and [Id] = scope_identity()
I debugged the code right down to the AddObject method and verified that the Name property was set on the entity, but it doesn't reflect that in the SQL.
Can you see anything wrong with what I'm doing?
Updated with mapping xml
<?xml version="1.0" encoding="utf-8"?>
<edmx:Edmx Version="1.0" xmlns:edmx="http://schemas.microsoft.com/ado/2007/06/edmx">
<!-- EF Runtime content -->
<edmx:Runtime>
<!-- SSDL content -->
<edmx:StorageModels>
<Schema Namespace="ProductCatalogModel.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/2006/04/edm/ssdl">
<EntityContainer Name="ProductCatalogModelStoreContainer">
<EntitySet Name="Category" EntityType="ProductCatalogModel.Store.Category" store:Type="Tables" Schema="dbo" />
<EntitySet Name="Product" EntityType="ProductCatalogModel.Store.Product" store:Type="Tables" Schema="dbo" />
<AssociationSet Name="FK_Product_Category" Association="ProductCatalogModel.Store.FK_Product_Category">
<End Role="Category" EntitySet="Category" />
<End Role="Product" EntitySet="Product" />
</AssociationSet>
</EntityContainer>
<EntityType Name="Category">
<Key>
<PropertyRef Name="Id" />
</Key>
<Property Name="Id" Type="int" Nullable="false" StoreGeneratedPattern="Identity" />
<Property Name="Name" Type="varchar" Nullable="false" MaxLength="50" />
</EntityType>
<EntityType Name="Product">
<Key>
<PropertyRef Name="Id" />
</Key>
<Property Name="Id" Type="int" Nullable="false" StoreGeneratedPattern="Identity" />
<Property Name="Name" Type="varchar" Nullable="false" MaxLength="50" />
<Property Name="CategoryId" Type="int" Nullable="false" />
</EntityType>
<Association Name="FK_Product_Category">
<End Role="Category" Type="ProductCatalogModel.Store.Category" Multiplicity="1" />
<End Role="Product" Type="ProductCatalogModel.Store.Product" Multiplicity="*" />
<ReferentialConstraint>
<Principal Role="Category">
<PropertyRef Name="Id" />
</Principal>
<Dependent Role="Product">
<PropertyRef Name="CategoryId" />
</Dependent>
</ReferentialConstraint>
</Association>
</Schema>
</edmx:StorageModels>
<!-- CSDL content -->
<edmx:ConceptualModels>
<Schema Namespace="ProductCatalogModel" Alias="Self" xmlns="http://schemas.microsoft.com/ado/2006/04/edm">
<EntityContainer Name="ProductCatalogEntities">
<EntitySet Name="Category" EntityType="ProductCatalogModel.Category" />
<EntitySet Name="Product" EntityType="ProductCatalogModel.Product" />
<AssociationSet Name="FK_Product_Category" Association="ProductCatalogModel.FK_Product_Category">
<End Role="Category" EntitySet="Category" />
<End Role="Product" EntitySet="Product" />
</AssociationSet>
</EntityContainer>
<EntityType Name="Category">
<Key>
<PropertyRef Name="Id" />
</Key>
<Property Name="Id" Type="Int32" Nullable="false" />
<Property Name="Name" Type="String" Nullable="false" MaxLength="50" Unicode="false" FixedLength="false" />
<NavigationProperty Name="Product" Relationship="ProductCatalogModel.FK_Product_Category" FromRole="Category" ToRole="Product" />
</EntityType>
<EntityType Name="Product" Abstract="false">
<Key>
<PropertyRef Name="Id" />
</Key>
<Property Name="Id" Type="Int32" Nullable="false" />
<Property Name="Name" Type="String" Nullable="false" MaxLength="50" Unicode="false" FixedLength="false" />
<NavigationProperty Name="Category" Relationship="ProductCatalogModel.FK_Product_Category" FromRole="Product" ToRole="Category" />
</EntityType>
<Association Name="FK_Product_Category">
<End Role="Category" Type="ProductCatalogModel.Category" Multiplicity="1" />
<End Role="Product" Type="ProductCatalogModel.Product" Multiplicity="*" />
</Association>
</Schema>
</edmx:ConceptualModels>
<!-- C-S mapping content -->
<edmx:Mappings>
<Mapping Space="C-S" xmlns="urn:schemas-microsoft-com:windows:storage:mapping:CS">
<EntityContainerMapping StorageEntityContainer="ProductCatalogModelStoreContainer" CdmEntityContainer="ProductCatalogEntities">
<EntitySetMapping Name="Category">
<EntityTypeMapping TypeName="IsTypeOf(ProductCatalogModel.Category)">
<MappingFragment StoreEntitySet="Category">
<ScalarProperty Name="Id" ColumnName="Id" />
<ScalarProperty Name="Name" ColumnName="Name" />
</MappingFragment>
</EntityTypeMapping>
</EntitySetMapping>
<EntitySetMapping Name="Product">
<EntityTypeMapping TypeName="IsTypeOf(ProductCatalogModel.Product)">
<MappingFragment StoreEntitySet="Product">
<ScalarProperty Name="Id" ColumnName="Id" />
<ScalarProperty Name="Name" ColumnName="Name" />
</MappingFragment>
</EntityTypeMapping>
</EntitySetMapping>
<AssociationSetMapping Name="FK_Product_Category" TypeName="ProductCatalogModel.FK_Product_Category" StoreEntitySet="Product">
<EndProperty Name="Category">
<ScalarProperty Name="Id" ColumnName="CategoryId" />
</EndProperty>
<EndProperty Name="Product">
<ScalarProperty Name="Id" ColumnName="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/2007/06/edmx">
<edmx:Connection>
<DesignerInfoPropertySet>
<DesignerProperty Name="MetadataArtifactProcessing" Value="EmbedInOutputAssembly" />
</DesignerInfoPropertySet>
</edmx:Connection>
<edmx:Options>
<DesignerInfoPropertySet>
<DesignerProperty Name="ValidateOnBuild" Value="true" />
</DesignerInfoPropertySet>
</edmx:Options>
<!-- Diagram content (shape and connector positions) -->
<edmx:Diagrams>
<Diagram Name="Model">
<EntityTypeShape EntityType="ProductCatalogModel.Category" Width="1.5" PointX="0.75" PointY="0.875" Height="1.427958984375" IsExpanded="true" />
<EntityTypeShape EntityType="ProductCatalogModel.Product" Width="1.5" PointX="3" PointY="0.875" Height="1.427958984375" IsExpanded="true" />
<AssociationConnector Association="ProductCatalogModel.FK_Product_Category" ManuallyRouted="false">
<ConnectorPoint PointX="2.25" PointY="1.5889794921875" />
<ConnectorPoint PointX="3" PointY="1.5889794921875" /></AssociationConnector>
</Diagram></edmx:Diagrams>
</edmx:Designer>
</edmx:Edmx>
I hate to say this, but all I did was mess with it for about an hour and now it works. I did not change a freaking thing. Thanks Microsoft for such a production ready technology.
Probably not related to this issue but a couple of things to think about with EntityFramework
The compilation is database specific. Problems can arise if you don't compile it against the database version you plan on using (eg. SQL Server 2005 vs 2000) - this can cause issues if your local DB is 2005 vs a test or production enviroment is 2000.
Making a small change to the edmx file, even something as small as moving an entity in the designer view will cause the database mapping files to recompile and can possibly fix issues related to mapping / etc.
I've got a project in written in the EDM. Does anyone know how to get the value of the discriminator column from an entity in a TPH inheritance tree? I can't add the property to the entity. Is there any other way to get the value?
Thanks,
Roy
There is a simple way to solve the problem for the DBMS that suports updatable views.
You can simply create a view or a Defining Query having an additional discriminator column.
The original column should be mapped to the class property. In case when DBMS does not support the updatable views you can use Defining Query and then map stored procedures for Insert/Update/Delete operations.
Here is an example for Oracle database:
SQL:
CREATE TABLE TEST.TPH_TABLE (
ID NUMBER(9),
COLUMN_A VARCHAR2(20),
COLUMN_B VARCHAR2(20),
BASE_COLUMN VARCHAR2(20),
CONSTRAINT PK_TPH_TABLE PRIMARY KEY (ID)
);
EDMX:
<edmx:Edmx Version="1.0" xmlns:edmx="http://schemas.microsoft.com/ado/2007/06/edmx">
<!-- EF Runtime content -->
<edmx:Runtime>
<!-- SSDL content -->
<edmx:StorageModels>
<Schema Namespace="Model1.Store" Alias="Self" Provider="Devart.Data.Oracle" ProviderManifestToken="ORA" xmlns:store="http://schemas.microsoft.com/ado/2007/12/edm/EntityStoreSchemaGenerator" xmlns="http://schemas.microsoft.com/ado/2006/04/edm/ssdl">
<EntityContainer Name="Model1StoreContainer">
<EntitySet Name="TPH_TABLE" EntityType="Model1.Store.TPH_TABLE" >
<DefiningQuery>
SELECT ID, BASE_COLUMN, COLUMN_A, COLUMN_B,
CASE WHEN COLUMN_A IS NOT NULL THEN '1' ELSE NULL END AS "IS_TABLE_A"
FROM TPH_TABLE
</DefiningQuery>
</EntitySet>
</EntityContainer>
<EntityType Name="TPH_TABLE">
<Key>
<PropertyRef Name="ID" />
</Key>
<Property Name="ID" Type="int" Nullable="false" />
<Property Name="BASE_COLUMN" Type="VARCHAR2" MaxLength="20" />
<Property Name="COLUMN_A" Type="VARCHAR2" MaxLength="20" />
<Property Name="COLUMN_B" Type="VARCHAR2" MaxLength="20" />
<Property Name="IS_TABLE_A" Type="VARCHAR2" MaxLength="1" />
</EntityType>
</Schema>
</edmx:StorageModels>
<!-- CSDL content -->
<edmx:ConceptualModels>
<Schema Namespace="Model1" Alias="Self" xmlns="http://schemas.microsoft.com/ado/2006/04/edm">
<EntityContainer Name="Entities">
<EntitySet Name="TPH_TABLE" EntityType="Model1.TPH_TABLE" />
</EntityContainer>
<EntityType Name="TPH_TABLE" Abstract="true">
<Key>
<PropertyRef Name="ID" />
</Key>
<Property Name="ID" Type="Int32" Nullable="false" />
<Property Name="BASE_COLUMN" Type="String" MaxLength="20" Unicode="true" FixedLength="false" />
</EntityType>
<EntityType Name="TABLE_A" BaseType="Model1.TPH_TABLE" >
<Property Name="COLUMN_A" Type="String" Nullable="true" />
</EntityType>
<EntityType Name="TABLE_B" BaseType="Model1.TPH_TABLE" >
<Property Name="COLUMN_B" Type="String" Nullable="true" />
</EntityType>
</Schema>
</edmx:ConceptualModels>
<!-- C-S mapping content -->
<edmx:Mappings>
<Mapping Space="C-S" xmlns="urn:schemas-microsoft-com:windows:storage:mapping:CS">
<EntityContainerMapping StorageEntityContainer="Model1StoreContainer" CdmEntityContainer="Entities">
<EntitySetMapping Name="TPH_TABLE">
<EntityTypeMapping TypeName="Model1.TABLE_A">
<MappingFragment StoreEntitySet="TPH_TABLE">
<ScalarProperty Name="ID" ColumnName="ID" />
<ScalarProperty Name="BASE_COLUMN" ColumnName="BASE_COLUMN" />
<ScalarProperty Name="COLUMN_A" ColumnName="COLUMN_A" />
<Condition ColumnName="IS_TABLE_A" Value="1" />
</MappingFragment>
</EntityTypeMapping>
<EntityTypeMapping TypeName="Model1.TABLE_B">
<MappingFragment StoreEntitySet="TPH_TABLE">
<ScalarProperty Name="ID" ColumnName="ID" />
<ScalarProperty Name="BASE_COLUMN" ColumnName="BASE_COLUMN" />
<ScalarProperty Name="COLUMN_B" ColumnName="COLUMN_B" />
<Condition ColumnName="IS_TABLE_A" IsNull="true" />
</MappingFragment>
</EntityTypeMapping>
</EntitySetMapping>
</EntityContainerMapping>
</Mapping>
</edmx:Mappings>
</edmx:Runtime>
<!-- EF Designer content (DO NOT EDIT MANUALLY BELOW HERE) -->
<edmx:Designer xmlns="http://schemas.microsoft.com/ado/2007/06/edmx">
<edmx:Connection>
<DesignerInfoPropertySet>
<DesignerProperty Name="MetadataArtifactProcessing" Value="EmbedInOutputAssembly" />
</DesignerInfoPropertySet>
</edmx:Connection>
<edmx:Options>
<DesignerInfoPropertySet>
<DesignerProperty Name="ValidateOnBuild" Value="true" />
</DesignerInfoPropertySet>
</edmx:Options>
<!-- Diagram content (shape and connector positions) -->
<edmx:Diagrams>
<Diagram Name="Model4">
<EntityTypeShape EntityType="Model1.TPH_TABLE" Width="1.5" PointX="3" PointY="0.5" Height="1.2636116536458335" IsExpanded="true" />
<EntityTypeShape EntityType="Model1.TABLE_A" Width="1.5" PointX="1.75" PointY="2.75" Height="1.099264322916667" />
<EntityTypeShape EntityType="Model1.TABLE_B" Width="1.5" PointX="4.25" PointY="2.75" Height="1.099264322916667" />
<InheritanceConnector EntityType="Model1.TABLE_B" ManuallyRouted="false">
<ConnectorPoint PointX="4.375" PointY="1.7636116536458335" />
<ConnectorPoint PointX="4.375" PointY="2.75" />
</InheritanceConnector>
<InheritanceConnector EntityType="Model1.TABLE_A" ManuallyRouted="false">
<ConnectorPoint PointX="3.125" PointY="1.7636116536458335" />
<ConnectorPoint PointX="3.125" PointY="2.75" />
</InheritanceConnector></Diagram></edmx:Diagrams>
</edmx:Designer>
</edmx:Edmx>