Get only one filed from a nested serializer

Her it is my django serializer:

class ShopSerializer(serializers.ModelSerializer):
    rest = RestSerializer(many=True)
    class Meta:
        model = RestaurantLike
        fields = ('id', 'created', 'updated', 'rest')

This will wrap whole RestSerializer inside ShopSerializer on response. How can I get only one or two fields from RestSerializer instead of having all the fields inside ShopSerializer?

Get only two field of RestSerializer instead of whole RestSerializer

If you want to have limited amount of fields from RestSerializer, then you can simply limit it in the fields:

class RestSerializer(serializers.ModelSerializer):
    class Meta:
        model = Restaurant
        fields = ('id', 'name', ...)

If you want just want field, lets say the primary key or Slug, then you can use PrimaryKeyRelatedField or SlugRelatedField for that. For example:

class ShopSerializer(serializers.ModelSerializer):
    rest = serializers.SlugRelatedField(
        many=True,
        read_only=True,
        slug_field='name'
    )
    class Meta:
        model = RestaurantLike
        fields = ('id', 'created', 'updated', 'rest')
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