Fixed #32923 -- Refactored out Field._clean_bound_field().

django/forms/fields.py

@@ -261,6 +261,10 @@ class Field:
         result.validators = self.validators[:]
         return result
 
+    def _clean_bound_field(self, bf):
+        value = bf.initial if self.disabled else bf.data
+        return self.clean(value)
+
 
 class CharField(Field):
     def __init__(
@@ -694,6 +698,10 @@ class FileField(Field):
     def has_changed(self, initial, data):
         return not self.disabled and data is not None
 
+    def _clean_bound_field(self, bf):
+        value = bf.initial if self.disabled else bf.data
+        return self.clean(value, bf.initial)
+
 
 class ImageField(FileField):
     default_validators = [validators.validate_image_file_extension]

django/forms/forms.py

@@ -6,7 +6,7 @@ import copy
 import datetime
 
 from django.core.exceptions import NON_FIELD_ERRORS, ValidationError
-from django.forms.fields import Field, FileField
+from django.forms.fields import Field
 from django.forms.utils import ErrorDict, ErrorList, RenderableFormMixin
 from django.forms.widgets import Media, MediaDefiningClass
 from django.utils.datastructures import MultiValueDict
@@ -329,13 +329,8 @@ class BaseForm(RenderableFormMixin):
     def _clean_fields(self):
         for name, bf in self._bound_items():
             field = bf.field
-            value = bf.initial if field.disabled else bf.data
             try:
-                if isinstance(field, FileField):
-                    value = field.clean(value, bf.initial)
-                else:
-                    value = field.clean(value)
-                self.cleaned_data[name] = value
+                self.cleaned_data[name] = field._clean_bound_field(bf)
                 if hasattr(self, "clean_%s" % name):
                     value = getattr(self, "clean_%s" % name)()
                     self.cleaned_data[name] = value