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from rest_framework import serializers
from dynamic_preferences.signals import preference_updated
class PreferenceValueField(serializers.Field):
def get_attribute(self, o):
return o
def to_representation(self, o):
return o.preference.api_repr(o.value)
def to_internal_value(self, data):
return data
class PreferenceSerializer(serializers.Serializer):
section = serializers.CharField(read_only=True)
name = serializers.CharField(read_only=True)
identifier = serializers.SerializerMethodField()
default = serializers.SerializerMethodField()
value = PreferenceValueField()
verbose_name = serializers.SerializerMethodField()
help_text = serializers.SerializerMethodField()
additional_data = serializers.SerializerMethodField()
field = serializers.SerializerMethodField()
class Meta:
fields = [
"default",
"value",
"verbose_name",
"help_text",
]
def get_default(self, o):
return o.preference.api_repr(o.preference.get("default"))
def get_verbose_name(self, o):
return o.preference.get("verbose_name")
def get_identifier(self, o):
return o.preference.identifier()
def get_help_text(self, o):
return o.preference.get("help_text")
def get_additional_data(self, o):
return o.preference.get_api_additional_data()
def get_field(self, o):
return o.preference.get_api_field_data()
def validate_value(self, value):
"""
We call validation from the underlying form field
"""
field = self.instance.preference.setup_field()
value = field.to_python(value)
field.validate(value)
field.run_validators(value)
return value
def update(self, instance, validated_data):
old_value = instance.value
instance.value = validated_data["value"]
instance.save()
preference_updated.send(
sender=self.__class__,
section=instance.section,
name=instance.name,
old_value=old_value,
new_value=validated_data["value"],
instance=instance
)
return instance
class GlobalPreferenceSerializer(PreferenceSerializer):
pass
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