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Model serializer caching.

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This commit is contained in:
Tom Christie 2014-12-19 16:02:27 +00:00
parent 62f78dfbf1
commit c06a82d053
1 changed files with 21 additions and 1 deletions
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22
rest_framework/serializers.py
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@ -682,6 +682,10 @@ def raise_errors_on_nested_writes(method_name, serializer, validated_data):
) )
MODEL_SERIALIZER_FIELDS_CACHE = {}
MODEL_SERIALIZER_VALIDATORS_CACHE = {}
class ModelSerializer(Serializer): class ModelSerializer(Serializer):
""" """
A `ModelSerializer` is just a regular `Serializer`, except that: A `ModelSerializer` is just a regular `Serializer`, except that:
@ -802,6 +806,11 @@ class ModelSerializer(Serializer):
Return the dict of field names -> field instances that should be Return the dict of field names -> field instances that should be
used for `self.fields` when instantiating the serializer. used for `self.fields` when instantiating the serializer.
""" """
cls = self.__class__
if cls in MODEL_SERIALIZER_FIELDS_CACHE:
return copy.deepcopy(MODEL_SERIALIZER_FIELDS_CACHE[cls])
declared_fields = copy.deepcopy(self._declared_fields) declared_fields = copy.deepcopy(self._declared_fields)
model = getattr(self.Meta, 'model') model = getattr(self.Meta, 'model')
depth = getattr(self.Meta, 'depth', 0) depth = getattr(self.Meta, 'depth', 0)
@ -837,6 +846,8 @@ class ModelSerializer(Serializer):
# Add in any hidden fields. # Add in any hidden fields.
ret.update(hidden_fields) ret.update(hidden_fields)
MODEL_SERIALIZER_FIELDS_CACHE[cls] = ret
return ret return ret
# Methods for determining the set of field names to include... # Methods for determining the set of field names to include...
@ -1217,12 +1228,21 @@ class ModelSerializer(Serializer):
if validators is not None: if validators is not None:
return validators[:] return validators[:]
cls = self.__class__
if cls in MODEL_SERIALIZER_VALIDATORS_CACHE:
return MODEL_SERIALIZER_VALIDATORS_CACHE[cls][:]
# Otherwise use the default set of validators. # Otherwise use the default set of validators.
return ( validators = (
self.get_unique_together_validators() + self.get_unique_together_validators() +
self.get_unique_for_date_validators() self.get_unique_for_date_validators()
) )
MODEL_SERIALIZER_VALIDATORS_CACHE[cls] = validators
return validators
def get_unique_together_validators(self): def get_unique_together_validators(self):
""" """
Determine a default set of validators for any unique_together contraints. Determine a default set of validators for any unique_together contraints.