f54aca70cc
In this changeset, I added the "goal" ObjectField which can either be loaded by setting the new "eager" parameter as True or not loaded (as before) by setting it to False. The advantage of introducing this eager parameter is that this way, we can reduce to a minimum the overhead of DB queries whenever the related goal is not actually needed. Partially-Implements: blueprint watcher-versioned-objects Change-Id: I103c9ed161d2cedf7b43c55f9e095ef66bf44dea
91 lines
2.6 KiB
Python
91 lines
2.6 KiB
Python
# Copyright 2013 IBM Corp.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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"""Utility methods for objects"""
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import ast
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import six
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from oslo_log import log
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from oslo_versionedobjects import fields
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LOG = log.getLogger(__name__)
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BooleanField = fields.BooleanField
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DateTimeField = fields.DateTimeField
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IntegerField = fields.IntegerField
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ListOfStringsField = fields.ListOfStringsField
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ObjectField = fields.ObjectField
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StringField = fields.StringField
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UUIDField = fields.UUIDField
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class Numeric(fields.FieldType):
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@staticmethod
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def coerce(obj, attr, value):
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if value is None:
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return value
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f_value = float(value)
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return f_value if not f_value.is_integer() else value
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class NumericField(fields.AutoTypedField):
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AUTO_TYPE = Numeric()
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class DictField(fields.AutoTypedField):
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AUTO_TYPE = fields.Dict(fields.FieldType())
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class FlexibleDict(fields.FieldType):
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@staticmethod
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def coerce(obj, attr, value):
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if isinstance(value, six.string_types):
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value = ast.literal_eval(value)
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return dict(value)
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class FlexibleDictField(fields.AutoTypedField):
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AUTO_TYPE = FlexibleDict()
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# TODO(lucasagomes): In our code we've always translated None to {},
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# this method makes this field to work like this. But probably won't
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# be accepted as-is in the oslo_versionedobjects library
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def _null(self, obj, attr):
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if self.nullable:
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return {}
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super(FlexibleDictField, self)._null(obj, attr)
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class FlexibleListOfDict(fields.FieldType):
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@staticmethod
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def coerce(obj, attr, value):
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if isinstance(value, six.string_types):
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value = ast.literal_eval(value)
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return list(value)
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class FlexibleListOfDictField(fields.AutoTypedField):
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AUTO_TYPE = FlexibleListOfDict()
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# TODO(lucasagomes): In our code we've always translated None to {},
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# this method makes this field to work like this. But probably won't
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# be accepted as-is in the oslo_versionedobjects library
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def _null(self, obj, attr):
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if self.nullable:
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return []
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super(FlexibleListOfDictField, self)._null(obj, attr)
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