diff options
Diffstat (limited to 'rest_framework/serializers.py')
| -rw-r--r-- | rest_framework/serializers.py | 65 |
1 files changed, 40 insertions, 25 deletions
diff --git a/rest_framework/serializers.py b/rest_framework/serializers.py index 10256d47..9cb548a5 100644 --- a/rest_framework/serializers.py +++ b/rest_framework/serializers.py @@ -16,6 +16,7 @@ import datetime import inspect import types from decimal import Decimal +from django.contrib.contenttypes.generic import GenericForeignKey from django.core.paginator import Page from django.db import models from django.forms import widgets @@ -438,16 +439,6 @@ class BaseSerializer(WritableField): raise ValidationError(self.error_messages['required']) return - # Set the serializer object if it exists - obj = get_component(self.parent.object, self.source or field_name) if self.parent.object else None - - # If we have a model manager or similar object then we need - # to iterate through each instance. - if (self.many and - not hasattr(obj, '__iter__') and - is_simple_callable(getattr(obj, 'all', None))): - obj = obj.all() - if self.source == '*': if value: reverted_data = self.restore_fields(value, {}) @@ -457,6 +448,16 @@ class BaseSerializer(WritableField): if value in (None, ''): into[(self.source or field_name)] = None else: + # Set the serializer object if it exists + obj = get_component(self.parent.object, self.source or field_name) if self.parent.object else None + + # If we have a model manager or similar object then we need + # to iterate through each instance. + if (self.many and + not hasattr(obj, '__iter__') and + is_simple_callable(getattr(obj, 'all', None))): + obj = obj.all() + kwargs = { 'instance': obj, 'data': value, @@ -757,8 +758,11 @@ class ModelSerializer(Serializer): field.read_only = True ret[accessor_name] = field + + # Ensure that 'read_only_fields' is an iterable + assert isinstance(self.opts.read_only_fields, (list, tuple)), '`read_only_fields` must be a list or tuple' - # Add the `read_only` flag to any fields that have bee specified + # Add the `read_only` flag to any fields that have been specified # in the `read_only_fields` option for field_name in self.opts.read_only_fields: assert field_name not in self.base_fields.keys(), ( @@ -771,7 +775,10 @@ class ModelSerializer(Serializer): "on serializer '%s'." % (field_name, self.__class__.__name__)) ret[field_name].read_only = True - + + # Ensure that 'write_only_fields' is an iterable + assert isinstance(self.opts.write_only_fields, (list, tuple)), '`write_only_fields` must be a list or tuple' + for field_name in self.opts.write_only_fields: assert field_name not in self.base_fields.keys(), ( "field '%s' on serializer '%s' specified in " @@ -821,6 +828,10 @@ class ModelSerializer(Serializer): if model_field: kwargs['required'] = not(model_field.null or model_field.blank) + if model_field.help_text is not None: + kwargs['help_text'] = model_field.help_text + if model_field.verbose_name is not None: + kwargs['label'] = model_field.verbose_name return PrimaryKeyRelatedField(**kwargs) @@ -881,7 +892,7 @@ class ModelSerializer(Serializer): except KeyError: return ModelField(model_field=model_field, **kwargs) - def get_validation_exclusions(self): + def get_validation_exclusions(self, instance=None): """ Return a list of field names to exclude from model validation. """ @@ -893,7 +904,7 @@ class ModelSerializer(Serializer): field_name = field.source or field_name if field_name in exclusions \ and not field.read_only \ - and field.required \ + and (field.required or hasattr(instance, field_name)) \ and not isinstance(field, Serializer): exclusions.remove(field_name) return exclusions @@ -908,7 +919,7 @@ class ModelSerializer(Serializer): the full_clean validation checking. """ try: - instance.full_clean(exclude=self.get_validation_exclusions()) + instance.full_clean(exclude=self.get_validation_exclusions(instance)) except ValidationError as err: self._errors = err.message_dict return None @@ -937,6 +948,8 @@ class ModelSerializer(Serializer): # Forward m2m relations for field in meta.many_to_many + meta.virtual_fields: + if isinstance(field, GenericForeignKey): + continue if field.name in attrs: m2m_data[field.name] = attrs.pop(field.name) @@ -946,17 +959,15 @@ class ModelSerializer(Serializer): if isinstance(self.fields.get(field_name, None), Serializer): nested_forward_relations[field_name] = attrs[field_name] - # Update an existing instance... - if instance is not None: - for key, val in attrs.items(): - try: - setattr(instance, key, val) - except ValueError: - self._errors[key] = self.error_messages['required'] + # Create an empty instance of the model + if instance is None: + instance = self.opts.model() - # ...or create a new instance - else: - instance = self.opts.model(**attrs) + for key, val in attrs.items(): + try: + setattr(instance, key, val) + except ValueError: + self._errors[key] = self.error_messages['required'] # Any relations that cannot be set until we've # saved the model get hidden away on these @@ -1081,6 +1092,10 @@ class HyperlinkedModelSerializer(ModelSerializer): if model_field: kwargs['required'] = not(model_field.null or model_field.blank) + if model_field.help_text is not None: + kwargs['help_text'] = model_field.help_text + if model_field.verbose_name is not None: + kwargs['label'] = model_field.verbose_name if self.opts.lookup_field: kwargs['lookup_field'] = self.opts.lookup_field |