mirror of
https://github.com/Hopiu/django-modeltranslation.git
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49 lines
1.5 KiB
Python
49 lines
1.5 KiB
Python
# -*- coding: utf-8 -*-
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from django import forms
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from django.core import validators
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from modeltranslation.fields import TranslationField
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class TranslationModelForm(forms.ModelForm):
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def __init__(self, *args, **kwargs):
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super(TranslationModelForm, self).__init__(*args, **kwargs)
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for f in self._meta.model._meta.fields:
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if f.name in self.fields and isinstance(f, TranslationField):
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del self.fields[f.name]
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class NullCharField(forms.CharField):
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"""
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CharField subclass that returns ``None`` when ``CharField`` would return empty string.
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"""
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def to_python(self, value):
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if value in validators.EMPTY_VALUES:
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return None
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return super(NullCharField, self).to_python(value)
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class NullableField(forms.Field):
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"""
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Form field mixin that ensures that ``None`` is not cast to anything (like
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the empty string with ``CharField`` and its derivatives).
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"""
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def to_python(self, value):
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if value is None:
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return value
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return super(NullableField, self).to_python(value)
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# Django 1.6
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def _has_changed(self, initial, data):
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return self.has_changed(initial, data)
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def has_changed(self, initial, data):
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if (initial is None and data is not None) or (initial is not None and data is None):
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return True
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obj = super(NullableField, self)
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if hasattr(obj, 'has_changed'):
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return obj.has_changed(initial, data)
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else: # Django < 1.9 compat
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return obj._has_changed(initial, data)
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