dafbd30ef8
In sqlalchemy, there are some advanced filter criterion but such filter criterion is not supported in OVO. An example is the "not in" criterion which is achieved by "query.filter(~db_model.column.in_(values))". Another example is the "not equal" criterion which is achieved by "query.filter(db_model.column != value)" This commit adds support for custom filtering. We introduce a base class called "FilterObj" from which the custom filter class should inherit. This commit also implements two filter class: one for implementing the "not in" criterion and the other for the "not equal" criterion. In addition, it makes StringMatchingFilterObj inherit from the FilterObj class. Needed-By: https://review.openstack.org/#/c/609848/ Change-Id: I9ac7fb000d2bed445efbc226c30abdcd981b90cb Partial-Implements: blueprint adopt-oslo-versioned-objects-for-db
101 lines
2.4 KiB
Python
101 lines
2.4 KiB
Python
# 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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import abc
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import copy
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import six
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from neutron_lib import exceptions
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def convert_filters(**kwargs):
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result = copy.deepcopy(kwargs)
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if 'tenant_id' in result:
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if 'project_id' in result:
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raise exceptions.TenantIdProjectIdFilterConflict()
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result['project_id'] = result.pop('tenant_id')
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return result
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@six.add_metaclass(abc.ABCMeta)
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class FilterObj(object):
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@abc.abstractmethod
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def filter(self, column):
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pass
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class StringMatchingFilterObj(FilterObj):
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@property
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def is_contains(self):
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return bool(getattr(self, "contains", False))
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@property
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def is_starts(self):
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return bool(getattr(self, "starts", False))
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@property
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def is_ends(self):
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return bool(getattr(self, "ends", False))
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class StringContains(StringMatchingFilterObj):
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def __init__(self, matching_string):
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super(StringContains, self).__init__()
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self.contains = matching_string
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def filter(self, column):
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return column.contains(self.contains)
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class StringStarts(StringMatchingFilterObj):
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def __init__(self, matching_string):
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super(StringStarts, self).__init__()
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self.starts = matching_string
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def filter(self, column):
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return column.startswith(self.starts)
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class StringEnds(StringMatchingFilterObj):
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def __init__(self, matching_string):
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super(StringEnds, self).__init__()
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self.ends = matching_string
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def filter(self, column):
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return column.endswith(self.ends)
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class NotIn(FilterObj):
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def __init__(self, value):
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super(NotIn, self).__init__()
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self.value = value
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def filter(self, column):
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return ~column.in_(self.value)
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class NotEqual(FilterObj):
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def __init__(self, value):
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super(NotEqual, self).__init__()
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self.value = value
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def filter(self, column):
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return column != self.value
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