if both sides of relationship are new belongs_to side may not get reported back

class Foo 
  belongs_to :bar 
end

class Bar
  has_one :foo 
end

bar = Bar.new(foo: Foo.new)
bar.save

everything gets saved but in the return data the new instance of Foo will not be reported, and thus bar.foo will not have an id, and will look like its still "new". If you then bar.save again, another copy of Foo gets created.

testing fix for #173

There are two reasons the data may not get reported:

There is not policy for the Foo, so no attributes are returned.
Because of the order of saves on the server, what happens is the new instances of foo and bar are created, and linked, but then bar is saved first, causing an automatic save of foo. This makes the system think foo never changed, and thus no data is reported.

further work on #173

fixed regression and other issues raised by #173

continuing to work correct solution to #173

one more time to fix #173 and duplicate dispatches