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Merge pull request #439 from irrelative/master

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Cache all fields per serializer instance
This commit is contained in:
Tom Christie 2012-11-22 16:17:47 -08:00
commit 7ade5add21
1 changed files with 9 additions and 13 deletions
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22
rest_framework/serializers.py
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@ -60,7 +60,7 @@ def _get_declared_fields(bases, attrs):
# If this class is subclassing another Serializer, add that Serializer's
# fields. Note that we loop over the bases in *reverse*. This is necessary
# in order to the correct order of fields.
# in order to maintain the correct order of fields.
for base in bases[::-1]:
if hasattr(base, 'base_fields'):
fields = base.base_fields.items() + fields
@ -94,7 +94,6 @@ class BaseSerializer(Field):
def __init__(self, instance=None, data=None, files=None, context=None, partial=False, **kwargs):
super(BaseSerializer, self).__init__(**kwargs)
self.opts = self._options_class(self.Meta)
self.fields = copy.deepcopy(self.base_fields)
self.parent = None
self.root = None
self.partial = partial
@ -104,7 +103,7 @@ class BaseSerializer(Field):
self.init_data = data
self.init_files = files
self.object = instance
self.default_fields = self.get_default_fields()
self.fields = self.get_fields()
self._data = None
self._files = None
@ -129,13 +128,15 @@ class BaseSerializer(Field):
ret = SortedDict()
# Get the explicitly declared fields
for key, field in self.fields.items():
base_fields = copy.deepcopy(self.base_fields)
for key, field in base_fields.items():
ret[key] = field
# Set up the field
field.initialize(parent=self, field_name=key)
# Add in the default fields
for key, val in self.default_fields.items():
default_fields = self.get_default_fields()
for key, val in default_fields.items():
if key not in ret:
ret[key] = val
@ -182,8 +183,7 @@ class BaseSerializer(Field):
ret = self._dict_class()
ret.fields = {}
fields = self.get_fields()
for field_name, field in fields.items():
for field_name, field in self.fields.items():
key = self.get_field_key(field_name)
value = field.field_to_native(obj, field_name)
ret[key] = value
@ -195,9 +195,8 @@ class BaseSerializer(Field):
Core of deserialization, together with `restore_object`.
Converts a dictionary of data into a dictionary of deserialized fields.
"""
fields = self.get_fields()
reverted_data = {}
for field_name, field in fields.items():
for field_name, field in self.fields.items():
try:
field.field_from_native(data, files, field_name, reverted_data)
except ValidationError as err:
@ -209,10 +208,7 @@ class BaseSerializer(Field):
"""
Run `validate_<fieldname>()` and `validate()` methods on the serializer
"""
# TODO: refactor this so we're not determining the fields again
fields = self.get_fields()
for field_name, field in fields.items():
for field_name, field in self.fields.items():
try:
validate_method = getattr(self, 'validate_%s' % field_name, None)
if validate_method: