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POEntity Framework - Entity Mapping problem
 

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    <p>I have two tables: Address and Contact which are joined on contactID (in Contact). Both of these tables have entities in my Entity data model (EF 4.0) and I do not wan't to modify them.</p> <p>I do want to create a new entity that contains information from both entities.</p> <p>What I did so far:</p> <p>In CSDL:</p> <pre><code>&lt;EntityContainer...&gt; &lt;EntitySet Name="AddressTest" EntityType="WebGearsModel.Test" /&gt; &lt;EntitySet Name="ContactTest" EntityType="WebGearsModel.Test" /&gt; &lt;/EntityContainer&gt; &lt;EntityType Name="Test"&gt; &lt;Key&gt; &lt;PropertyRef Name="addressID" /&gt; &lt;/Key&gt; &lt;Property Type="Int32" Name="addressID" Nullable="false" annotation:StoreGeneratedPattern="Identity" /&gt; &lt;Property Type="Int32" Name="contactID" Nullable="false" /&gt; &lt;Property Type="String" Name="firstName" Nullable="false" MaxLength="30" FixedLength="false" Unicode="false" /&gt; &lt;Property Type="String" Name="emailAddress" Nullable="false" MaxLength="150" FixedLength="false" Unicode="false" /&gt; &lt;/EntityType&gt; </code></pre> <p>In my C-S mapping:</p> <pre><code>&lt;EntitySetMapping Name="AddressTest"&gt; &lt;EntityTypeMapping TypeName="WebGearsModel.Test"&gt; &lt;MappingFragment StoreEntitySet="Address"&gt; &lt;ScalarProperty Name="addressID" ColumnName="addressID" /&gt; &lt;ScalarProperty Name="contactID" ColumnName="contactID" /&gt; &lt;ScalarProperty Name="firstName" ColumnName="firstName" /&gt; &lt;/MappingFragment&gt; &lt;/EntityTypeMapping&gt; &lt;/EntitySetMapping&gt; &lt;EntitySetMapping Name="ContactTest"&gt; &lt;EntityTypeMapping TypeName="WebGearsModel.Test"&gt; &lt;MappingFragment StoreEntitySet="Contact"&gt; &lt;ScalarProperty Name="contactID" ColumnName="contactID" /&gt; &lt;ScalarProperty Name="emailAddress" ColumnName="emailAddress" /&gt; &lt;/MappingFragment&gt; &lt;/EntityTypeMapping&gt; &lt;/EntitySetMapping&gt; </code></pre> <p>The error I'm receiving is:</p> <blockquote> <p>Problem in mapping fragments starting at line 150:Must specify mapping for all key properties (ContactTest.addressID) of the EntitySet ContactTest.</p> </blockquote> <p>How am I supposed to map an AddressID from the Contact entity when it doesn't exist in that entity? I guess I need some sort of association but I'm unsure how to go about it... Remember, I don't want to have to modify my existing Address and Contact entities.</p>
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