45 lines
1.3 KiB
Python
45 lines
1.3 KiB
Python
# Copyright 2014 Huawei Technologies Co. Ltd
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain 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,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""Common database query."""
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from compass.db.models import BASE
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def model_query(session, model, *args, **kwargs):
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if not issubclass(model, BASE):
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raise Exception("model should be sublass of BASE!")
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with session.begin(subtransactions=True):
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query = session.query(model)
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return query
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def model_filter(query, model, filters, legal_keys):
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for key in filters:
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if key not in legal_keys:
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continue
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value = filters[key]
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col_attr = getattr(model, key)
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if isinstance(value, list):
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query = query.filter(col_attr.in_(value))
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else:
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query = query.filter(col_attr == value)
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return query
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