Python rest_framework.serializers 模块，ChoiceField() 实例源码

def typemap(self, p):
        mapping = {
            ParameterType.String : serializers.CharField,
            ParameterType.Number : serializers.FloatField,
            ParameterType.Integer : serializers.IntegerField,
            ParameterType.Boolean : serializers.BooleanField,
            ParameterType.Array : serializers.ListField,
            ParameterType.Enum : serializers.ChoiceField,
            ParameterType.File : serializers.FileField
        }

        return mapping.get(p, None)

    # TODO: properly handle array and enums

def test_should_choice_convert_string():
    assert_conversion(serializers.ChoiceField, graphene.String, choices=[])

def field_to_schema(field):
    title = force_text(field.label) if field.label else ''
    description = force_text(field.help_text) if field.help_text else ''

    if isinstance(field, serializers.ListSerializer):
        child_schema = field_to_schema(field.child)
        return coreschema.Array(
            items=child_schema,
            title=title,
            description=description
        )
    elif isinstance(field, serializers.Serializer):
        return coreschema.Object(
            properties=OrderedDict([
                (key, field_to_schema(value))
                for key, value
                in field.fields.items()
            ]),
            title=title,
            description=description
        )
    elif isinstance(field, serializers.ManyRelatedField):
        return coreschema.Array(
            items=coreschema.String(),
            title=title,
            description=description
        )
    elif isinstance(field, serializers.RelatedField):
        return coreschema.String(title=title, description=description)
    elif isinstance(field, serializers.MultipleChoiceField):
        return coreschema.Array(
            items=coreschema.Enum(enum=list(field.choices.keys())),
            title=title,
            description=description
        )
    elif isinstance(field, serializers.ChoiceField):
        return coreschema.Enum(
            enum=list(field.choices.keys()),
            title=title,
            description=description
        )
    elif isinstance(field, serializers.BooleanField):
        return coreschema.Boolean(title=title, description=description)
    elif isinstance(field, (serializers.DecimalField, serializers.FloatField)):
        return coreschema.Number(title=title, description=description)
    elif isinstance(field, serializers.IntegerField):
        return coreschema.Integer(title=title, description=description)

    if field.style.get('base_template') == 'textarea.html':
        return coreschema.String(
            title=title,
            description=description,
            format='textarea'
        )
    return coreschema.String(title=title, description=description)

def get_raw_data_form(self, data, view, method, request):
        """
        Returns a form that allows for arbitrary content types to be tunneled
        via standard HTML forms.
        (Which are typically application/x-www-form-urlencoded)
        """
        # See issue #2089 for refactoring this.
        serializer = getattr(data, 'serializer', None)
        if serializer and not getattr(serializer, 'many', False):
            instance = getattr(serializer, 'instance', None)
            if isinstance(instance, Page):
                instance = None
        else:
            instance = None

        with override_method(view, request, method) as request:
            # Check permissions
            if not self.show_form_for_method(view, method, request, instance):
                return

            # If possible, serialize the initial content for the generic form
            default_parser = view.parser_classes[0]
            renderer_class = getattr(default_parser, 'renderer_class', None)
            if hasattr(view, 'get_serializer') and renderer_class:
                # View has a serializer defined and parser class has a
                # corresponding renderer that can be used to render the data.

                if method in ('PUT', 'PATCH'):
                    serializer = view.get_serializer(instance=instance)
                else:
                    serializer = view.get_serializer()

                # Render the raw data content
                renderer = renderer_class()
                accepted = self.accepted_media_type
                context = self.renderer_context.copy()
                context['indent'] = 4
                content = renderer.render(serializer.data, accepted, context)
            else:
                content = None

            # Generate a generic form that includes a content type field,
            # and a content field.
            media_types = [parser.media_type for parser in view.parser_classes]
            choices = [(media_type, media_type) for media_type in media_types]
            initial = media_types[0]

            class GenericContentForm(forms.Form):
                _content_type = forms.ChoiceField(
                    label='Media type',
                    choices=choices,
                    initial=initial,
                    widget=forms.Select(attrs={'data-override': 'content-type'})
                )
                _content = forms.CharField(
                    label='Content',
                    widget=forms.Textarea(attrs={'data-override': 'content'}),
                    initial=content
                )

            return GenericContentForm()

def get_raw_data_form(self, data, view, method, request):
        """
        Returns a form that allows for arbitrary content types to be tunneled
        via standard HTML forms.
        (Which are typically application/x-www-form-urlencoded)
        """
        # See issue #2089 for refactoring this.
        serializer = getattr(data, 'serializer', None)
        if serializer and not getattr(serializer, 'many', False):
            instance = getattr(serializer, 'instance', None)
            if isinstance(instance, Page):
                instance = None
        else:
            instance = None

        with override_method(view, request, method) as request:
            # Check permissions
            if not self.show_form_for_method(view, method, request, instance):
                return

            # If possible, serialize the initial content for the generic form
            default_parser = view.parser_classes[0]
            renderer_class = getattr(default_parser, 'renderer_class', None)
            if (hasattr(view, 'get_serializer') and renderer_class):
                # View has a serializer defined and parser class has a
                # corresponding renderer that can be used to render the data.

                if method in ('PUT', 'PATCH'):
                    serializer = view.get_serializer(instance=instance)
                else:
                    serializer = view.get_serializer()

                # Render the raw data content
                renderer = renderer_class()
                accepted = self.accepted_media_type
                context = self.renderer_context.copy()
                context['indent'] = 4
                content = renderer.render(serializer.data, accepted, context)
            else:
                content = None

            # Generate a generic form that includes a content type field,
            # and a content field.
            media_types = [parser.media_type for parser in view.parser_classes]
            choices = [(media_type, media_type) for media_type in media_types]
            initial = media_types[0]

            class GenericContentForm(forms.Form):
                _content_type = forms.ChoiceField(
                    label='Media type',
                    choices=choices,
                    initial=initial,
                    widget=forms.Select(attrs={'data-override': 'content-type'})
                )
                _content = forms.CharField(
                    label='Content',
                    widget=forms.Textarea(attrs={'data-override': 'content'}),
                    initial=content
                )

            return GenericContentForm()