Ticket #18166: django-formset-form-kwargs.diff

django/forms/formsets.py

@@ -8 +8 @@
 from django.utils.encoding import StrAndUnicode
 from django.utils.safestring import mark_safe
 from django.utils.translation import ugettext as _
+from copy import copy
 
-
 __all__ = ('BaseFormSet', 'all_valid')
 
 # special field names
@@ -36 +36 @@
     A collection of instances of the same Form class.
     """
     def __init__(self, data=None, files=None, auto_id='id_%s', prefix=None,
-                 initial=None, error_class=ErrorList):
+                 initial=None, error_class=ErrorList, form_kwargs=None):
         self.is_bound = data is not None or files is not None
         self.prefix = prefix or self.get_default_prefix()
         self.auto_id = auto_id
@@ -46 +46 @@
         self.error_class = error_class
         self._errors = None
         self._non_form_errors = None
+        self.form_kwargs = form_kwargs or { }
         # construct the forms in the formset
         self._construct_forms()
 
@@ -112 +113 @@
         # instantiate all the forms and put them in self.forms
         self.forms = []
         for i in xrange(self.total_form_count()):
-            self.forms.append(self._construct_form(i))
+            per_form_kwargs = self._kwargs_for_form(i)
+            form_kwargs = { }
+            if self.form_kwargs:
+                form_kwargs = copy(self.form_kwargs)
+            if per_form_kwargs:
+                form_kwargs.update(per_form_kwargs)
+            self.forms.append(self._construct_form(i, **form_kwargs))
 
     def _construct_form(self, i, **kwargs):
         """
@@ -135 +142 @@
         self.add_fields(form, i)
         return form
 
+    def _kwargs_for_form(self, i):
+        """
+        Generate the kwargs to instantiate the i-th form instance in a formset.
+        """
+        return { }
+
     def _get_initial_forms(self):
         """Return a list of all the initial forms in this formset."""
         return self.forms[:self.initial_form_count()]