Created
December 6, 2022 16:10
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from collections import OrderedDict | |
from typing import Dict, Any, Mapping | |
from django.core.exceptions import ValidationError as DjangoValidationError | |
from rest_framework import serializers | |
from rest_framework.fields import set_value, get_error_detail, SkipField | |
from rest_framework.exceptions import ValidationError | |
from rest_framework.settings import api_settings | |
class SetValueOverrideSerializerMixin(serializers.Serializer): | |
""" | |
Copies serializers.Serializer.to_internal_value, making set_value overridable. | |
No functional changes introduced when compared to serializers.Serializer. | |
""" | |
def set_value(self, aggregator: Dict[str, Any], field: serializers.Field, validated_value: Any): | |
set_value(aggregator, field.source_attrs, validated_value) | |
def to_internal_value(self, data): | |
"""Original implementation, except for the comment-wrapped part below.""" | |
if not isinstance(data, Mapping): | |
message = self.error_messages['invalid'].format(datatype=type(data).__name__) | |
raise ValidationError({api_settings.NON_FIELD_ERRORS_KEY: [message]}, code='invalid') | |
ret = OrderedDict() | |
errors = OrderedDict() | |
fields = self._writable_fields | |
for field in fields: | |
validate_method = getattr(self, 'validate_' + field.field_name, None) | |
primitive_value = field.get_value(data) | |
try: | |
validated_value = field.run_validation(primitive_value) | |
if validate_method is not None: | |
validated_value = validate_method(validated_value) | |
except ValidationError as exc: | |
errors[field.field_name] = exc.detail | |
except DjangoValidationError as exc: | |
errors[field.field_name] = get_error_detail(exc) | |
except SkipField: | |
pass | |
else: | |
########################################### | |
# NB: Beginning of the added functionality | |
self.set_value(ret, field, validated_value) | |
# NB: End of the added functionality | |
########################################### | |
if errors: | |
raise ValidationError(errors) | |
return ret | |
class RegroupSerializerMixin(SetValueOverrideSerializerMixin): | |
def set_value(self, aggregator: Dict[str, Any], field: serializers.Field, validated_value: Any): | |
""" | |
Uses deep_update to update aggregator with the validated_value, in case it is a mapping. | |
""" | |
if isinstance(validated_value, Mapping): | |
materialized_dict = {} | |
set_value(materialized_dict, field.source_attrs, validated_value) | |
#https://stackoverflow.com/questions/3232943/update-value-of-a-nested-dictionary-of-varying-depth | |
aggregator.update(deep_update(aggregator, materialized_dict)) | |
else: | |
super().set_value(aggregator, field, validated_value) |
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it will actually take some time. see what I commented there.