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Fixed #9147 -- Added `FormPreview.process_preview` customization hook…

…. Thanks, bthomas and thalin.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@12486 bcc190cf-cafb-0310-a4f2-bffc1f526a37
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commit a9b2ac25d1760e1b8e01632544b7f503ccab8577 1 parent 9810178
@jbronn jbronn authored
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8 django/contrib/formtools/preview.py
@@ -60,6 +60,7 @@ def preview_post(self, request):
f = self.form(request.POST, auto_id=AUTO_ID)
context = {'form': f, 'stage_field': self.unused_name('stage'), 'state': self.state}
if f.is_valid():
+ self.process_preview(request, f, context)
context['hash_field'] = self.unused_name('hash')
context['hash_value'] = self.security_hash(request, f)
return render_to_response(self.preview_template, context, context_instance=RequestContext(request))
@@ -96,6 +97,13 @@ def parse_params(self, *args, **kwargs):
"""
pass
+ def process_preview(self, request, form, context):
+ """
+ Given a validated form, performs any extra processing before displaying
+ the preview page, and saves any extra data in context.
+ """
+ pass
+
def security_hash(self, request, form):
"""
Calculates the security hash for the given HttpRequest and Form instances.
View
13 docs/ref/contrib/formtools/form-preview.txt
@@ -108,3 +108,16 @@ These values can be overridden for a particular form preview by setting
:attr:`~django.contrib.formtools.FormPreview.form_template` attributes on the
FormPreview subclass. See :file:`django/contrib/formtools/templates` for the
default templates.
+
+Advanced ``FormPreview`` methods
+================================
+
+.. versionadded:: 1.2
+
+.. method:: FormPreview.process_preview
+
+ Given a validated form, performs any extra processing before displaying the
+ preview page, and saves any extra data in context.
+
+ By default, this method is empty. It is called after the form is validated,
+ but before the context is modified with hash information and rendered.
View
4 docs/ref/contrib/formtools/form-wizard.txt
@@ -199,8 +199,8 @@ wizard takes a list of your :class:`~django.forms.Form` objects as arguments::
(r'^contact/$', ContactWizard([ContactForm1, ContactForm2])),
)
-Advanced FormWizard methods
-===========================
+Advanced ``FormWizard`` methods
+===============================
.. class:: FormWizard
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