Hi, all.<div>using PB i wanted to implement some access control check on my copyable objects.</div><div>so i placed that in getStateToCopyFor, all is ok except when i need to perfom some asynchronous call in that method.</div>
<div>ex: (i use twisted 10.1.0)<br><div>...</div><div>def getStateToCopyFor(self, user):</div><div>  state = self.getStateToCopy()</div><div>  d = user.has_perm()  # this do an asynchronous call</div><div>  def got_perm(allowed, state):</div>
<div>    if not allowed:</div><div>      state[&#39;secret&#39;] = &#39;&#39;</div><div>      return state </div><div>  d.addCallback(got_perm, state)</div><div>  return d</div><div>...  </div></div><div><br></div><div>here user.has_perm performe a database access so it returns a deferred, but when i return that deferred, i got an error saying that &#39;state&#39; is not a dict (which is quit normal cause it&#39;s a deferred).</div>
<div>it seems pb do not handle this case, i know i can put my control logic directly in the view method (where returning a deferred is handled) but this will lead to a lot of code duplication, and i really thought that getStateToCopyFor is made for that purpouse.</div>
<div>so i wanted to ask what&#39;s the best way to achieve that ?</div><div><br></div><div>Thankx !</div>