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Code Issues 32 Releases Wiki Activity

Removed the legacy form wizard.

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This commit is contained in:
Aymeric Augustin
2012-12-24 22:55:11 +01:00
parent 052271168b
commit d4ea02b992
5 changed files with 2 additions and 559 deletions
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253
django/contrib/formtools/tests/__init__.py
View File

@@ -10,7 +10,6 @@ import warnings
from django import http
from django.conf import settings
from django.contrib.formtools import preview, utils
from django.contrib.formtools.wizard import FormWizard
from django.test import TestCase
from django.test.html import parse_html
from django.test.utils import override_settings
@@ -187,255 +186,3 @@ class FormHmacTests(unittest.TestCase):
hash1 = utils.form_hmac(f1)
hash2 = utils.form_hmac(f2)
self.assertEqual(hash1, hash2)
#
# FormWizard tests
#
class TestWizardClass(FormWizard):
def get_template(self, step):
return 'forms/wizard.html'
def done(self, request, cleaned_data):
return http.HttpResponse(success_string)
class DummyRequest(http.HttpRequest):
def __init__(self, POST=None):
super(DummyRequest, self).__init__()
self.method = POST and "POST" or "GET"
if POST is not None:
self.POST.update(POST)
self._dont_enforce_csrf_checks = True
@override_settings(
SECRET_KEY="123",
TEMPLATE_DIRS=(
os.path.join(os.path.dirname(upath(__file__)), 'templates'),
),
)
class WizardTests(TestCase):
urls = 'django.contrib.formtools.tests.urls'
wizard_step_data = (
{
'0-name': 'Pony',
'0-thirsty': '2',
},
{
'1-address1': '123 Main St',
'1-address2': 'Djangoland',
},
{
'2-random_crap': 'blah blah',
}
)
def setUp(self):
super(WizardTests, self).setUp()
self.save_warnings_state()
warnings.filterwarnings('ignore', category=DeprecationWarning,
module='django.contrib.formtools.wizard')
def tearDown(self):
super(WizardTests, self).tearDown()
self.restore_warnings_state()
def test_step_starts_at_zero(self):
"""
step should be zero for the first form
"""
response = self.client.get('/wizard1/')
self.assertEqual(0, response.context['step0'])
def test_step_increments(self):
"""
step should be incremented when we go to the next page
"""
response = self.client.post('/wizard1/', {"0-field":"test", "wizard_step":"0"})
self.assertEqual(1, response.context['step0'])
def test_bad_hash(self):
"""
Form should not advance if the hash is missing or bad
"""
response = self.client.post('/wizard1/',
{"0-field":"test",
"1-field":"test2",
"wizard_step": "1"})
self.assertEqual(0, response.context['step0'])
def test_good_hash(self):
"""
Form should advance if the hash is present and good, as calculated using
current method.
"""
data = {"0-field": "test",
"1-field": "test2",
"hash_0": {
2: "cd13b1db3e8f55174bc5745a1b1a53408d4fd1ca",
3: "9355d5dff22d49dbad58e46189982cec649f9f5b",
}[pickle.HIGHEST_PROTOCOL],
"wizard_step": "1"}
response = self.client.post('/wizard1/', data)
self.assertEqual(2, response.context['step0'])
def test_11726(self):
"""
Regression test for ticket #11726.
Wizard should not raise Http404 when steps are added dynamically.
"""
reached = [False]
that = self
class WizardWithProcessStep(TestWizardClass):
def process_step(self, request, form, step):
if step == 0:
if self.num_steps() < 2:
self.form_list.append(WizardPageTwoForm)
if step == 1:
that.assertTrue(isinstance(form, WizardPageTwoForm))
reached[0] = True
wizard = WizardWithProcessStep([WizardPageOneForm])
data = {"0-field": "test",
"1-field": "test2",
"hash_0": {
2: "cd13b1db3e8f55174bc5745a1b1a53408d4fd1ca",
3: "9355d5dff22d49dbad58e46189982cec649f9f5b",
}[pickle.HIGHEST_PROTOCOL],
"wizard_step": "1"}
wizard(DummyRequest(POST=data))
self.assertTrue(reached[0])
data = {"0-field": "test",
"1-field": "test2",
"hash_0": {
2: "cd13b1db3e8f55174bc5745a1b1a53408d4fd1ca",
3: "9355d5dff22d49dbad58e46189982cec649f9f5b",
}[pickle.HIGHEST_PROTOCOL],
"hash_1": {
2: "1e6f6315da42e62f33a30640ec7e007ad3fbf1a1",
3: "c33142ef9d01b1beae238adf22c3c6c57328f51a",
}[pickle.HIGHEST_PROTOCOL],
"wizard_step": "2"}
self.assertRaises(http.Http404, wizard, DummyRequest(POST=data))
def test_14498(self):
"""
Regression test for ticket #14498. All previous steps' forms should be
validated.
"""
reached = [False]
that = self
class WizardWithProcessStep(TestWizardClass):
def process_step(self, request, form, step):
that.assertTrue(form.is_valid())
reached[0] = True
wizard = WizardWithProcessStep([WizardPageOneForm,
WizardPageTwoForm,
WizardPageThreeForm])
data = {"0-field": "test",
"1-field": "test2",
"hash_0": {
2: "cd13b1db3e8f55174bc5745a1b1a53408d4fd1ca",
3: "9355d5dff22d49dbad58e46189982cec649f9f5b",
}[pickle.HIGHEST_PROTOCOL],
"wizard_step": "1"}
wizard(DummyRequest(POST=data))
self.assertTrue(reached[0])
def test_14576(self):
"""
Regression test for ticket #14576.
The form of the last step is not passed to the done method.
"""
reached = [False]
that = self
class Wizard(TestWizardClass):
def done(self, request, form_list):
reached[0] = True
that.assertTrue(len(form_list) == 2)
wizard = Wizard([WizardPageOneForm,
WizardPageTwoForm])
data = {"0-field": "test",
"1-field": "test2",
"hash_0": {
2: "cd13b1db3e8f55174bc5745a1b1a53408d4fd1ca",
3: "9355d5dff22d49dbad58e46189982cec649f9f5b",
}[pickle.HIGHEST_PROTOCOL],
"wizard_step": "1"}
wizard(DummyRequest(POST=data))
self.assertTrue(reached[0])
def test_15075(self):
"""
Regression test for ticket #15075. Allow modifying wizard's form_list
in process_step.
"""
reached = [False]
that = self
class WizardWithProcessStep(TestWizardClass):
def process_step(self, request, form, step):
if step == 0:
self.form_list[1] = WizardPageTwoAlternativeForm
if step == 1:
that.assertTrue(isinstance(form, WizardPageTwoAlternativeForm))
reached[0] = True
wizard = WizardWithProcessStep([WizardPageOneForm,
WizardPageTwoForm,
WizardPageThreeForm])
data = {"0-field": "test",
"1-field": "test2",
"hash_0": {
2: "cd13b1db3e8f55174bc5745a1b1a53408d4fd1ca",
3: "9355d5dff22d49dbad58e46189982cec649f9f5b",
}[pickle.HIGHEST_PROTOCOL],
"wizard_step": "1"}
wizard(DummyRequest(POST=data))
self.assertTrue(reached[0])
def grab_field_data(self, response):
"""
Pull the appropriate field data from the context to pass to the next wizard step
"""
previous_fields = parse_html(response.context['previous_fields'])
fields = {'wizard_step': response.context['step0']}
for input_field in previous_fields:
input_attrs = dict(input_field.attributes)
fields[input_attrs["name"]] = input_attrs["value"]
return fields
def check_wizard_step(self, response, step_no):
"""
Helper function to test each step of the wizard
- Make sure the call succeeded
- Make sure response is the proper step number
- return the result from the post for the next step
"""
step_count = len(self.wizard_step_data)
self.assertContains(response, 'Step %d of %d' % (step_no, step_count))
data = self.grab_field_data(response)
data.update(self.wizard_step_data[step_no - 1])
return self.client.post('/wizard2/', data)
def test_9473(self):
response = self.client.get('/wizard2/')
for step_no in range(1, len(self.wizard_step_data) + 1):
response = self.check_wizard_step(response, step_no)

29
django/contrib/formtools/tests/forms.py
View File

@@ -1,21 +1,4 @@
from django import forms
from django.contrib.formtools.wizard import FormWizard
from django.http import HttpResponse
class Page1(forms.Form):
name = forms.CharField(max_length=100)
thirsty = forms.NullBooleanField()
class Page2(forms.Form):
address1 = forms.CharField(max_length=100)
address2 = forms.CharField(max_length=100)
class Page3(forms.Form):
random_crap = forms.CharField(max_length=100)
class ContactWizard(FormWizard):
def done(self, request, form_list):
return HttpResponse("")
class TestForm(forms.Form):
field1 = forms.CharField()
@@ -30,15 +13,3 @@ class HashTestForm(forms.Form):
class HashTestBlankForm(forms.Form):
name = forms.CharField(required=False)
bio = forms.CharField(required=False)
class WizardPageOneForm(forms.Form):
field = forms.CharField()
class WizardPageTwoForm(forms.Form):
field = forms.CharField()
class WizardPageTwoAlternativeForm(forms.Form):
field = forms.CharField()
class WizardPageThreeForm(forms.Form):
field = forms.CharField()

8
django/contrib/formtools/tests/urls.py
View File

@@ -5,15 +5,11 @@ This is a URLconf to be loaded by tests.py. Add any URLs needed for tests only.
from __future__ import absolute_import
from django.conf.urls import patterns, url
from django.contrib.formtools.tests import TestFormPreview, TestWizardClass
from django.contrib.formtools.tests import TestFormPreview
from django.contrib.formtools.tests.forms import (ContactWizard, Page1, Page2,
Page3, TestForm, WizardPageOneForm, WizardPageTwoForm, WizardPageThreeForm)
from django.contrib.formtools.tests.forms import TestForm
urlpatterns = patterns('',
url(r'^preview/', TestFormPreview(TestForm)),
url(r'^wizard1/$', TestWizardClass(
[WizardPageOneForm, WizardPageTwoForm, WizardPageThreeForm])),
url(r'^wizard2/$', ContactWizard([Page1, Page2, Page3])),
)

1
django/contrib/formtools/wizard/__init__.py
View File

@@ -1 +0,0 @@
from django.contrib.formtools.wizard.legacy import FormWizard

270
django/contrib/formtools/wizard/legacy.py
View File

@@ -1,270 +0,0 @@
"""
FormWizard class -- implements a multi-page form, validating between each
step and storing the form's state as HTML hidden fields so that no state is
stored on the server side.
"""
from django.forms import HiddenInput
from django.http import Http404
from django.shortcuts import render_to_response
from django.template.context import RequestContext
from django.utils.crypto import constant_time_compare
from django.utils.translation import ugettext_lazy as _
from django.utils.decorators import method_decorator
from django.views.decorators.csrf import csrf_protect
from django.contrib.formtools.utils import form_hmac
class FormWizard(object):
# The HTML (and POST data) field name for the "step" variable.
step_field_name="wizard_step"
# METHODS SUBCLASSES SHOULDN'T OVERRIDE ###################################
def __init__(self, form_list, initial=None):
"""
Start a new wizard with a list of forms.
form_list should be a list of Form classes (not instances).
"""
self.form_list = form_list[:]
self.initial = initial or {}
# Dictionary of extra template context variables.
self.extra_context = {}
# A zero-based counter keeping track of which step we're in.
self.step = 0
import warnings
warnings.warn(
'Old-style form wizards have been deprecated; use the class-based '
'views in django.contrib.formtools.wizard.views instead.',
DeprecationWarning)
def __repr__(self):
return "step: %d\nform_list: %s\ninitial_data: %s" % (self.step, self.form_list, self.initial)
def get_form(self, step, data=None):
"Helper method that returns the Form instance for the given step."
# Sanity check.
if step >= self.num_steps():
raise Http404('Step %s does not exist' % step)
return self.form_list[step](data, prefix=self.prefix_for_step(step), initial=self.initial.get(step, None))
def num_steps(self):
"Helper method that returns the number of steps."
# You might think we should just set "self.num_steps = len(form_list)"
# in __init__(), but this calculation needs to be dynamic, because some
# hook methods might alter self.form_list.
return len(self.form_list)
def _check_security_hash(self, token, request, form):
expected = self.security_hash(request, form)
return constant_time_compare(token, expected)
@method_decorator(csrf_protect)
def __call__(self, request, *args, **kwargs):
"""
Main method that does all the hard work, conforming to the Django view
interface.
"""
if 'extra_context' in kwargs:
self.extra_context.update(kwargs['extra_context'])
current_step = self.get_current_or_first_step(request, *args, **kwargs)
self.parse_params(request, *args, **kwargs)
# Validate and process all the previous forms before instantiating the
# current step's form in case self.process_step makes changes to
# self.form_list.
# If any of them fails validation, that must mean the validator relied
# on some other input, such as an external Web site.
# It is also possible that alidation might fail under certain attack
# situations: an attacker might be able to bypass previous stages, and
# generate correct security hashes for all the skipped stages by virtue
# of:
# 1) having filled out an identical form which doesn't have the
# validation (and does something different at the end),
# 2) or having filled out a previous version of the same form which
# had some validation missing,
# 3) or previously having filled out the form when they had more
# privileges than they do now.
#
# 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.
previous_form_list = []
for i in range(current_step):
f = self.get_form(i, request.POST)
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)
else:
self.process_step(request, f, i)
previous_form_list.append(f)
# 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 next_step == self.num_steps():
return self.done(request, previous_form_list + [form])
else:
form = self.get_form(next_step)
self.step = current_step = next_step
return self.render(form, request, current_step)
def render(self, form, request, step, context=None):
"Renders the given Form object, returning an HttpResponse."
old_data = request.POST
prev_fields = []
if old_data:
hidden = HiddenInput()
# Collect all data from previous steps and render it as HTML hidden fields.
for i in range(step):
old_form = self.get_form(i, old_data)
hash_name = 'hash_%s' % i
prev_fields.extend([bf.as_hidden() for bf in old_form])
prev_fields.append(hidden.render(hash_name, old_data.get(hash_name, self.security_hash(request, old_form))))
return self.render_template(request, form, ''.join(prev_fields), step, context)
# METHODS SUBCLASSES MIGHT OVERRIDE IF APPROPRIATE ########################
def prefix_for_step(self, step):
"Given the step, returns a Form prefix to use."
return str(step)
def render_hash_failure(self, request, step):
"""
Hook for rendering a template if a hash check failed.
step is the step that failed. Any previous step is guaranteed to be
valid.
This default implementation simply renders the form for the given step,
but subclasses may want to display an error message, etc.
"""
return self.render(self.get_form(step), request, step, context={'wizard_error': _('We apologize, but your form has expired. Please continue filling out the form from this page.')})
def render_revalidation_failure(self, request, step, form):
"""
Hook for rendering a template if final revalidation failed.
It is highly unlikely that this point would ever be reached, but See
the comment in __call__() for an explanation.
"""
return self.render(form, request, step)
def security_hash(self, request, form):
"""
Calculates the security hash for the given HttpRequest and Form instances.
Subclasses may want to take into account request-specific information,
such as the IP address.
"""
return form_hmac(form)
def get_current_or_first_step(self, request, *args, **kwargs):
"""
Given the request object and whatever *args and **kwargs were passed to
__call__(), returns the current step (which is zero-based).
Note that the result should not be trusted. It may even be a completely
invalid number. It's not the job of this method to validate it.
"""
if not request.POST:
return 0
try:
step = int(request.POST.get(self.step_field_name, 0))
except ValueError:
return 0
return step
def parse_params(self, request, *args, **kwargs):
"""
Hook for setting some state, given the request object and whatever
*args and **kwargs were passed to __call__(), sets some state.
This is called at the beginning of __call__().
"""
pass
def get_template(self, step):
"""
Hook for specifying the name of the template to use for a given step.
Note that this can return a tuple of template names if you'd like to
use the template system's select_template() hook.
"""
return 'forms/wizard.html'
def render_template(self, request, form, previous_fields, step, context=None):
"""
Renders the template for the given step, returning an HttpResponse object.
Override this method if you want to add a custom context, return a
different MIME type, etc. If you only need to override the template
name, use get_template() instead.
The template will be rendered with the following context:
step_field -- The name of the hidden field containing the step.
step0 -- The current step (zero-based).
step -- The current step (one-based).
step_count -- The total number of steps.
form -- The Form instance for the current step (either empty
or with errors).
previous_fields -- A string representing every previous data field,
plus hashes for completed forms, all in the form of
hidden fields. Note that you'll need to run this
through the "safe" template filter, to prevent
auto-escaping, because it's raw HTML.
"""
context = context or {}
context.update(self.extra_context)
return render_to_response(self.get_template(step), dict(context,
step_field=self.step_field_name,
step0=step,
step=step + 1,
step_count=self.num_steps(),
form=form,
previous_fields=previous_fields
), context_instance=RequestContext(request))
def process_step(self, request, form, step):
"""
Hook for modifying the FormWizard's internal state, given a fully
validated Form object. The Form is guaranteed to have clean, valid
data.
This method should *not* modify any of that data. Rather, it might want
to set self.extra_context or dynamically alter self.form_list, based on
previously submitted forms.
Note that this method is called every time a page is rendered for *all*
submitted steps.
"""
pass
# METHODS SUBCLASSES MUST OVERRIDE ########################################
def done(self, request, form_list):
"""
Hook for doing something with the validated data. This is responsible
for the final processing.
form_list is a list of Form instances, each containing clean, valid
data.
"""
raise NotImplementedError("Your %s class has not defined a done() method, which is required." % self.__class__.__name__)