odatagen: Failed to generate proxy classes. Please verify the metadata (iOS) - iphone

Question

Im working on Open Data Protocol (OData) which is a standardized protocol for creating and consuming data API's.
OData builds on core protocols like HTTP and commonly accepted methodologies like REST .
I have installed, configured and built OData successfully on iOS6
Currently I'm creating a Proxy class to connect to the OData Service using the following commands:
cd /Users/Shamsu/Applications/ODataObjC/ODataSDKV1-1.3/Framework/bin/ODatagenBinary/MacOSX10.7.sdk/Debug
./odatagen /uri=http://35.35.6.4/MyApp.MyApp3D.DataService/MyApp3DDataService.svc/ /out=/Users/Ramshad/Applications/ODataObjC/ODataSDKV1-1.3/Framework/bin/ODatagenBinary/MacOSX10.7.sdk/Debug /u=sa /p=123
However, I'm getting the error: "odatagen: Failed to generate proxy classes. Please verify the metadata"
I can see the "metadata.xml" file is updated as
<?xml version="1.0" encoding="utf-8"?>
<edmx:Edmx Version="1.0" xmlns:edmx="http://schemas.microsoft.com/ado/2007/06/edmx">
<edmx:DataServices m:DataServiceVersion="1.0" m:MaxDataServiceVersion="3.0" xmlns:m="http://schemas.microsoft.com/ado/2007/08/dataservices/metadata">
<Schema Namespace="MyAppDBModel" xmlns="http://schemas.microsoft.com/ado/2009/11/edm">
<EntityType Name="User">
<Key>
<PropertyRef Name="UserID" />
</Key>
<Property Name="UserID" Type="Edm.Guid" Nullable="false" />
<Property Name="UserName" Type="Edm.String" MaxLength="10" FixedLength="true" Unicode="true" />
<Property Name="UserDescription" Type="Edm.String" MaxLength="50" FixedLength="false" Unicode="true" />
<Property Name="Active" Type="Edm.Int64" />
</EntityType>
</Schema>
<Schema Namespace="MyApp.MyApp3D.DataService" xmlns="http://schemas.microsoft.com/ado/2009/11/edm">
<EntityContainer Name="MyAppDBEntities" m:IsDefaultEntityContainer="true" p6:LazyLoadingEnabled="true" xmlns:p6="http://schemas.microsoft.com/ado/2009/02/edm/annotation">
<EntitySet Name="User" EntityType="MyAppDBModel.User" />
</EntityContainer>
</Schema>
</edmx:DataServices>
</edmx:Edmx> "
Note: the metadata.xml file is located at out param location (/Users/Ramshad/Applications/ODataObjC/ODataSDKV11.3/Framework/bin/ODatagenBinary/MacOSX10.7.sdk/Debug /metadata.xml)
I'm unable to identify the issue. Any problem with my windows WCF service /ODataService configuration/database configuration ? Permission assigned as * (read,write).
Any help on this issue is appreciated.
Thanks.

Answer 1

I looked a bit closer at the XSLT document I linked to in my original comment, and it seems that the odatagen tool hasn't been updated to work with CSDL v3. The version of CSDL (i.e., the format used to serialize the metadata document) is indicated by the xml namespace of the Schema element. In your metadata, that namespace is http://schemas.microsoft.com/ado/2009/11/edm, which indicates CSDL v3. You can see in the XSLT document here that this namespace isn't recognized by the odatagen tool.
Since the odatagen tool is open source (see the source on github), you can try to tweak the code and XSLT files to make it work for your situation. You could try to just add the v3 namespace to the recognized schema namespaces, and if your metadata doesn't use any v3 features, I would imagine it would just work. Off the top of my head I'm not sure of the exact differences between v2 and v3, so I can't immediately say whether the metadata you've posted above would be valid in CSDL v2.
Alternatively, you could try to generate the $metadata document so that it's using CSDL v2 instead.
Sorry I don't have a better answer for you. Unfortunately, the odatagen tool has fallen a bit behind. But you're more than welcome to contribute to the project :)