How to make ImageField returns relative path?

Question

I don't know why, but my ImageFields return full URL pathes.

This is MEDIA_URL setting:

MEDIA_URL = '/cc/cc/media/'

I use this custom FileStorage:

class ASCIIFileSystemStorage(FileSystemStorage):
    def get_valid_name(self, name):
        return str(uuid.uuid4()) + '.' + name.split('.')[-1]

And simple ModelSerializers (from django rest framework) without overwriting smth like that for model Module1Item:

class Module1Item(models.Model):
    ...
    background = models.ImageField(blank=True)


class Module1ItemSerializer(serializers.ModelSerializer):
    class Meta:
        model = Module1Item
        fields = '__all__'

What can be the reason of those behaviour? I need relative URLs.

Can you add your serializer and `MEDIA_URL` setting value? – neverwalkaloner Jul 18 '18 at 12:11 — neverwalkaloner, Jul 18 '18 at 12:11
@neverwalkaloner, ok, I have added them. – Alexander Shpindler Jul 18 '18 at 12:19 — Alexander Shpindler, Jul 18 '18 at 12:19

neverwalkaloner · Accepted Answer · 2018-07-18T12:41:42.367

7

serializer's ImageField using absulute url by default. You can override to_representation method to change it:

class Module1ItemSerializer(serializers.ModelSerializer):
    class Meta:
        model = Module1Item
        fields = '__all__'

    def to_representation(self, instance):
        response = super(Module1ItemSerializer, self).to_representation(instance)
        if instance.background:
            response['background'] = instance.background.url
        return response

edited Jul 18 '18 at 12:41

answered Jul 18 '18 at 12:21

neverwalkaloner

46,181
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1

why not `source`? – Brown Bear Jul 18 '18 at 12:35
1

@BearBrown oops, totally forgot about it:( – neverwalkaloner Jul 18 '18 at 12:37
1

@BearBrown Just wonder will `source='background.url'` raise has no file associated with it if background is empty? – neverwalkaloner Jul 18 '18 at 12:43
@BearBrown By the way, I tried background = serializers.ImageField(source='background.url') and it returns null although it returns value with relative path when I overrided to_representation. Where am I wrong? – Alexander Shpindler Jul 18 '18 at 12:54
@AlexanderShpindler you need change `serializers.ImageField` to `serializers.CharField` if you want use `source` – Brown Bear Jul 18 '18 at 14:10

score 0 · Answer 2 · answered Jul 15 '22 at 05:25

0

Another solution with example from the comments above.

class Module1ItemSerializer(serializers.ModelSerializer):
    background = serializers.CharField(source="background.url")
    class Meta:
        model = Module1Item
        fields = '__all__'

answered Jul 15 '22 at 05:25

BaiJiFeiLong

3,716
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How to make ImageField returns relative path?

2 Answers2