Python rest_framework.fields.DecimalField() Examples

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Example #1
Source File: serializers.py    From django-rest-framework-mongoengine with MIT License 4 votes vote down vote up 
def build_standard_field(self, field_name, model_field):
        field_mapping = ClassLookupDict(self.serializer_field_mapping)

        field_class = field_mapping[model_field]
        field_kwargs = get_field_kwargs(field_name, model_field)

        if 'choices' in field_kwargs:
            # Fields with choices get coerced into `ChoiceField`
            # instead of using their regular typed field.
            field_class = self.serializer_choice_field
            # Some model fields may introduce kwargs that would not be valid
            # for the choice field. We need to strip these out.
            # Eg. models.DecimalField(max_digits=3, decimal_places=1, choices=DECIMAL_CHOICES)
            valid_kwargs = set((
                'read_only', 'write_only',
                'required', 'default', 'initial', 'source',
                'label', 'help_text', 'style',
                'error_messages', 'validators', 'allow_null', 'allow_blank',
                'choices'
            ))
            for key in list(field_kwargs.keys()):
                if key not in valid_kwargs:
                    field_kwargs.pop(key)

        if 'regex' in field_kwargs:
            field_class = drf_fields.RegexField

        if not issubclass(field_class, drfm_fields.DocumentField):
            # `model_field` is only valid for the fallback case of
            # `ModelField`, which is used when no other typed field
            # matched to the model field.
            field_kwargs.pop('model_field', None)

        if not issubclass(field_class, drf_fields.CharField) and not issubclass(field_class, drf_fields.ChoiceField):
            # `allow_blank` is only valid for textual fields.
            field_kwargs.pop('allow_blank', None)

        if field_class is drf_fields.BooleanField and field_kwargs.get('allow_null', False):
            field_kwargs.pop('allow_null', None)
            field_kwargs.pop('default', None)
            field_class = drf_fields.NullBooleanField

        return field_class, field_kwargs