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Diffstat (limited to 'django/forms/fields.py')
| -rw-r--r-- | django/forms/fields.py | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/django/forms/fields.py b/django/forms/fields.py index 6408be2f06..7f978aa03d 100644 --- a/django/forms/fields.py +++ b/django/forms/fields.py @@ -965,7 +965,8 @@ class MultipleChoiceField(ChoiceField): if self.required and not value: raise ValidationError(self.error_messages["required"], code="required") # Validate that each value in the value list is in self.choices. - for val in value: + # Use set() to avoid redundant validation. + for val in set(value): if not self.valid_value(val): raise ValidationError( self.error_messages["invalid_choice"], |