63 lines
2.0 KiB
Python
63 lines
2.0 KiB
Python
# Copyright (C) 2015 Catalyst IT Ltd
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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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import json
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from decorator import decorator
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from django.core.exceptions import FieldError
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from rest_framework.response import Response
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# "{'filters': {'fieldname': { 'operation': 'value'}}
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@decorator
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def parse_filters(func, *args, **kwargs):
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"""
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Parses incoming filters paramters and converts them to
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Django usable operations if valid.
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BE AWARE! WILL NOT WORK UNLESS POSITIONAL ARGUMENT 3 IS FILTERS!
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"""
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request = args[1]
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filters = request.query_params.get("filters", None)
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if not filters:
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return func(*args, **kwargs)
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cleaned_filters = {}
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try:
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filters = json.loads(filters)
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for field, operations in filters.items():
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for operation, value in operations.items():
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cleaned_filters["%s__%s" % (field, operation)] = value
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except (ValueError, AttributeError):
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return Response(
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{
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"errors": [
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"Filters incorrectly formatted. Required format: "
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"{'filters': {'fieldname': { 'operation': 'value'}}"
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]
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},
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status=400,
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)
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try:
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# NOTE(adriant): This feels dirty and unclear, but it works.
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# Positional argument 3 is filters, so we just replace it.
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args = list(args)
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args[2] = cleaned_filters
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return func(*args, **kwargs)
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except FieldError as e:
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return Response({"errors": [str(e)]}, status=400)
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