template.py 文件源码

def dispatchResult(self, request, node, result):
        """
        Check a given result from handling a node and hand it to a process*
        method which will convert the result into a node and insert it
        into the DOM tree. Return the new node.
        """
        if not isinstance(result, defer.Deferred):
            adapter = INodeMutator(result, None)
            if adapter is None:
                raise NotImplementedError(
                    "Your factory method returned %s, but there is no "
                    "INodeMutator adapter registerred for %s." %
                    (result, getattr(result, "__class__",
                                     None) or type(result)))
            result = adapter.generate(request, node)
        if isinstance(result, defer.Deferred):
            self.outstandingCallbacks += 1
            result.addCallback(self.dispatchResultCallback, request, node)
            result.addErrback(self.renderFailure, request)
            # Got to wait until the callback comes in
        return result