57 lines
1.6 KiB
Python
57 lines
1.6 KiB
Python
# zoo - versatile objects management
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# Copyright (C) 2016 Entr'ouvert
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#
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# This program is free software: you can redistribute it and/or modify it
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# under the terms of the GNU Affero General Public License as published
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# by the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Affero General Public License for more details.
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#
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# You should have received a copy of the GNU Affero General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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from django.db.models import Func, Value, CharField
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class Unaccent(Func):
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function = 'immutable_unaccent'
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arity = 1
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class Normalize(Func):
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function = 'immutable_normalize'
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arity = 1
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class JSONRef(Func):
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function = ''
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arg_joiner = '->'
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def __init__(self, *expressions, **extra):
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jsonb = expressions[0]
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refs = map(Value, expressions[1:])
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super(JSONRef, self).__init__(jsonb, *refs, **extra)
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class JSONTextRef(Func):
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function = ''
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arg_joiner = '->>'
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arity = 2
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output_field = CharField()
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def __init__(self, *expressions, **extra):
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jsonb = expressions[0]
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if len(expressions) > 2:
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jsonb = JSONRef(jsonb, *expressions[1:-1])
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ref = Value(expressions[-1])
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super(JSONTextRef, self).__init__(jsonb, ref, **extra)
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class TextCat(Func):
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function = ''
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arg_joiner = ' || '
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