Add catch around navigation property containment error

Author: Caitlin Bales (MSFT)

Templates/Android/generated/BaseEntityCollectionReferenceRequest.java.tt

@@ -22,7 +22,9 @@
 
     public void post(final <#=TypeName(c)#> new<#=TypeName(c)#>, final ICallback<<#=TypeName(c)#>> callback) {
 <#
-        String prop = c.AsOdcmProperty().GetServiceCollectionNavigationPropertyForPropertyType().Name;
+		var navigationProperty = c.AsOdcmProperty().GetServiceCollectionNavigationPropertyForPropertyType();
+		if (navigationProperty != null) {
+            String prop = c.AsOdcmProperty().GetServiceCollectionNavigationPropertyForPropertyType().Name;
 #>
         final String requestUrl = getBaseRequest().getRequestUrl().toString();
         final ReferenceRequestBody body = new ReferenceRequestBody(getBaseRequest().getClient().getServiceRoot() + "/<#=prop#>/" + new<#=TypeName(c)#>.id);
@@ -38,7 +40,8 @@
                 .buildRequest(getBaseRequest().getOptions())
                 .post(new<#=TypeName(c)#>, body);
     }
-
+<#     } 
+#>
 <# if (c.GetFeatures().CanExpand) { #>
     /**
      * Sets the expand clause for the request

Templates/CSharp/Base/CollectionRequest.Base.template.tt

@@ -135,6 +135,8 @@ public string GetPostAsyncMethodForReferencesRequest(OdcmProperty odcmProperty)
     var templateWriter = (CodeWriterCSharp)templateWriterHost.CodeWriter;
 
     var serviceNavigationProperty = odcmProperty.GetServiceCollectionNavigationPropertyForPropertyType();
+	if (serviceNavigationProperty == null)
+		return string.Empty;
 
     var stringBuilder = new StringBuilder();
 

Templates/ObjC/Requests/EntityCollectionRequest.m.tt

@@ -89,7 +89,7 @@ if (innerEntityType.Equals(propName))
 - (NSMutableURLRequest *)add<#=innerEntity.Name.ToUpperFirstChar()#>:(<#=innerEntityType#>*)<#=innerEntity.Name.ToLowerFirstChar()#>
 {
 <#
-    if(collectionReference)
+    if(collectionReference && prop.GetServiceCollectionNavigationPropertyForPropertyType() != null)
     {
 #>
 

src/GraphODataTemplateWriter/Extensions/OdcmModelExtensions.cs

@@ -140,14 +140,22 @@ public static OdcmProperty GetServiceCollectionNavigationPropertyForPropertyType
             // class object. Use First() instead of FirstOrDefault() so template generation would fail if not found
             // instead of silently continuing. If an entity is used in a reference property a navigation collection
             // on the client for that type is required.
-            return odcmProperty
-                .Class
-                .Namespace
-                .Classes
-                .Where(odcmClass => odcmClass.Kind == OdcmClassKind.Service)
-                .SelectMany(service => (service as OdcmServiceClass).NavigationProperties())
-                .Where(property => property.IsCollection && property.Projection.Type.FullName.Equals(odcmProperty.Projection.Type.FullName))
-                .First();
+            try
+            {
+                return odcmProperty
+                    .Class
+                    .Namespace
+                    .Classes
+                    .Where(odcmClass => odcmClass.Kind == OdcmClassKind.Service)
+                    .SelectMany(service => (service as OdcmServiceClass).NavigationProperties())
+                    .Where(property => property.IsCollection && property.Projection.Type.FullName.Equals(odcmProperty.Projection.Type.FullName))
+                    .First();
+            } catch (Exception e)
+            {
+                //TODO: Pass the exception to the logger
+                Console.WriteLine("Error: The navigation property \"{0}\" on class \"{1}\" does not specify it is self-contained nor is it defined in an EntitySet", odcmProperty.Name.ToString(), odcmProperty.Class.FullName.ToString());
+                return null;
+            }
         }
 
         public static IEnumerable<OdcmProperty> NavigationProperties(this OdcmClass odcmClass)