Fixed #14498 - Forms passed to FormWizard.process_step are not guaranteed to have cleaned_data

Thanks to stas for the report.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@14290 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/contrib/formtools/tests/__init__.py

@@ -340,3 +340,23 @@ class WizardTests(TestCase):
                 "wizard_step": "1"}
         response = self.client.post('/wizard/', data)
         self.assertEquals(2, response.context['step0'])
+
+    def test_14498(self):
+        """
+        Regression test for ticket #14498.
+        """
+        that = self
+
+        class WizardWithProcessStep(WizardClass):
+            def process_step(self, request, form, step):
+                that.assertTrue(hasattr(form, 'cleaned_data'))
+
+        wizard = WizardWithProcessStep([WizardPageOneForm,
+                                        WizardPageTwoForm,
+                                        WizardPageThreeForm])
+        data = {"0-field": "test",
+                "1-field": "test2",
+                "hash_0": "7e9cea465f6a10a6fb47fcea65cb9a76350c9a5c",
+                "wizard_step": "1"}
+        wizard(DummyRequest(POST=data))
+

django/contrib/formtools/wizard.py

@@ -90,30 +90,14 @@ class FormWizard(object):
         if current_step >= self.num_steps():
             raise Http404('Step %s does not exist' % current_step)
 
-        # For each previous step, verify the hash and process.
-        # TODO: Move "hash_%d" to a method to make it configurable.
-        for i in range(current_step):
-            form = self.get_form(i, request.POST)
-            if not self._check_security_hash(request.POST.get("hash_%d" % i, ''), request, form):
-                return self.render_hash_failure(request, i)
-            self.process_step(request, form, i)
-
         # Process the current step. If it's valid, go to the next step or call
         # done(), depending on whether any steps remain.
         if request.method == 'POST':
             form = self.get_form(current_step, request.POST)
         else:
             form = self.get_form(current_step)
+
         if form.is_valid():
-            self.process_step(request, form, current_step)
-            next_step = current_step + 1
-
-            # If this was the last step, validate all of the forms one more
-            # time, as a sanity check, and call done().
-            num = self.num_steps()
-            if next_step == num:
-                final_form_list = [self.get_form(i, request.POST) for i in range(num)]
-
             # Validate all the forms. If any of them fail validation, that
             # must mean the validator relied on some other input, such as
             # an external Web site.
@@ -132,12 +116,23 @@ class FormWizard(object):
             # Since the hashes only take into account values, and not other
             # other validation the form might do, we must re-do validation
             # now for security reasons.
-                for i, f in enumerate(final_form_list):
+            current_form_list = [self.get_form(i, request.POST) for i in range(current_step)]
+
+            for i, f in enumerate(current_form_list):
+                if not self._check_security_hash(request.POST.get("hash_%d" % i, ''), request, f):
+                    return self.render_hash_failure(request, i)
+
                 if not f.is_valid():
                     return self.render_revalidation_failure(request, i, f)
-                return self.done(request, final_form_list)
+                else:
+                    self.process_step(request, f, i)
 
-            # Otherwise, move along to the next step.
+            # Now progress to processing this step:
+            self.process_step(request, form, current_step)
+            next_step = current_step + 1
+
+            if current_step == self.num_steps():
+                return self.done(request, final_form_list)
             else:
                 form = self.get_form(next_step)
                 self.step = current_step = next_step