4 files changed, 24 insertions, 7 deletions
diff --git a/django/newforms/fields.py b/django/newforms/fields.py
index d83cb6cde2..8fb1d4f392 100644
--- a/django/newforms/fields.py
+++ b/django/newforms/fields.py
@@ -144,7 +144,7 @@ class IntegerField(Field):
         if value in EMPTY_VALUES:
             return None
         try:
-            value = int(value)
+            value = int(str(value))
         except (ValueError, TypeError):
             raise ValidationError(ugettext(u'Enter a whole number.'))
         if self.max_value is not None and value > self.max_value:
@@ -192,7 +192,7 @@ class DecimalField(Field):
         super(DecimalField, self).clean(value)
         if not self.required and value in EMPTY_VALUES:
             return None
-        value = value.strip()
+        value = str(value).strip()
         try:
             value = Decimal(value)
         except DecimalException:
@@ -452,6 +452,10 @@ class BooleanField(Field):
     def clean(self, value):
         "Returns a Python boolean object."
         super(BooleanField, self).clean(value)
+        # Explicitly check for the string '0', which is what as hidden field
+        # will submit for False.
+        if value == '0':
+            return False
         return bool(value)
 
 class NullBooleanField(BooleanField):
diff --git a/django/newforms/forms.py b/django/newforms/forms.py
index ab8729be65..2b1caddeda 100644
--- a/django/newforms/forms.py
+++ b/django/newforms/forms.py
@@ -212,6 +212,16 @@ class BaseForm(StrAndUnicode):
         """
         return self.cleaned_data
 
+    def is_multipart(self):
+        """
+        Returns True if the form needs to be multipart-encrypted, i.e. it has
+        FileInput. Otherwise, False.
+        """
+        for field in self.fields.values():
+            if field.widget.needs_multipart_form:
+                return True
+        return False
+
 class Form(BaseForm):
     "A collection of Fields, plus their associated data."
     # This is a separate class from BaseForm in order to abstract the way
diff --git a/django/newforms/util.py b/django/newforms/util.py
index 57995bebd0..e19d894397 100644
--- a/django/newforms/util.py
+++ b/django/newforms/util.py
@@ -1,5 +1,5 @@
 from django.utils.html import escape
-from django.utils.encoding import smart_unicode, StrAndUnicode
+from django.utils.encoding import smart_unicode, StrAndUnicode, force_unicode
 from django.utils.functional import Promise
 
 def flatatt(attrs):
@@ -22,10 +22,10 @@ class ErrorDict(dict, StrAndUnicode):
 
     def as_ul(self):
         if not self: return u''
-        return u'<ul class="errorlist">%s</ul>' % ''.join([u'<li>%s%s</li>' % (k, smart_unicode(v)) for k, v in self.items()])
+        return u'<ul class="errorlist">%s</ul>' % ''.join([u'<li>%s%s</li>' % (k, force_unicode(v)) for k, v in self.items()])
 
     def as_text(self):
-        return u'\n'.join([u'* %s\n%s' % (k, u'\n'.join([u'  * %s' % smart_unicode(i) for i in v])) for k, v in self.items()])
+        return u'\n'.join([u'* %s\n%s' % (k, u'\n'.join([u'  * %s' % force_unicode(i) for i in v])) for k, v in self.items()])
 
 class ErrorList(list, StrAndUnicode):
     """
@@ -36,11 +36,11 @@ class ErrorList(list, StrAndUnicode):
 
     def as_ul(self):
         if not self: return u''
-        return u'<ul class="errorlist">%s</ul>' % ''.join([u'<li>%s</li>' % smart_unicode(e) for e in self])
+        return u'<ul class="errorlist">%s</ul>' % ''.join([u'<li>%s</li>' % force_unicode(e) for e in self])
 
     def as_text(self):
         if not self: return u''
-        return u'\n'.join([u'* %s' % smart_unicode(e) for e in self])
+        return u'\n'.join([u'* %s' % force_unicode(e) for e in self])
 
 class ValidationError(Exception):
     def __init__(self, message):
@@ -58,3 +58,4 @@ class ValidationError(Exception):
         # AttributeError: ValidationError instance has no attribute 'args'
         # See http://www.python.org/doc/current/tut/node10.html#handling
         return repr(self.messages)
+
diff --git a/django/newforms/widgets.py b/django/newforms/widgets.py
index f985124389..0e7752499e 100644
--- a/django/newforms/widgets.py
+++ b/django/newforms/widgets.py
@@ -24,6 +24,7 @@ __all__ = (
 
 class Widget(object):
     is_hidden = False          # Determines whether this corresponds to an <input type="hidden">.
+    needs_multipart_form = False # Determines does this widget need multipart-encrypted form
 
     def __init__(self, attrs=None):
         if attrs is not None:
@@ -120,6 +121,7 @@ class MultipleHiddenInput(HiddenInput):
 
 class FileInput(Input):
     input_type = 'file'
+    needs_multipart_form = True
 
     def render(self, name, value, attrs=None):
         return super(FileInput, self).render(name, None, attrs=attrs)