We are using the SDK's collection 'summary' fetch option. It works fine for all standard fields. Yet, when we include a custom field then we are getting a 500 error. Here is our code:
When above code runs with any standard fields (such as Priority in the above snippet) then all works. Yet, when we add this custom field (in above code snippet is: 'c_myCustomField') then we receive:
POST https://rally1.rallydev.com/slm/webservice/v2.0/HierarchicalRequirement 500
Indeed your experience is correct.
Custom Fields do not take part in the SDK's wsapi store Summary argument of the fetch function.