Relationship id return to server a String and not a Int!

Ember Data
4

I really liked your response, but I think it needs a small improvement - one needs to iterate over hasMany attribute to collect all values (following code is written in CoffeeScript):

serializeHasMany: (snapshot, json, relationship) ->
  @_super snapshot, json, relationship
  key = @keyForRelationship relationship.key, "hasMany" # with provided keyForRelationship() implementation
  for value, index in json[key]
    json[key][index] = parseInt value