125 lines
2.8 KiB
Python
125 lines
2.8 KiB
Python
# -*- coding: utf-8 -*-
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from django.db.models import Q, Manager
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import ox
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from oxdjango.query import QuerySet
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from oxdjango.managers import get_operator
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keymap = {
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'user': 'user__username',
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'name': 'name_find'
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}
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case_insensitive_keys = ('user__username',)
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default_key = 'name'
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def namePredicate(op, value):
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pat = {
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'==': '|%s|',
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'^': '|%s',
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'$': '%s|',
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}.get(op, '%s')
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return ('name_find__contains', pat % value.lower())
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def parseCondition(condition, user, item=None):
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'''
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'''
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k = condition.get('key', default_key)
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k = keymap.get(k, k)
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v = condition['value']
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op = condition.get('operator')
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if not op:
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op = '='
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if op.startswith('!'):
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return ~buildCondition(k, op[1:], v)
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else:
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return buildCondition(k, op, v)
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def buildCondition(k, op, v):
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find_key = None
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if k == 'id':
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v = ox.fromAZ(v)
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return Q(**{k: v})
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if isinstance(v, bool):
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key = k
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elif k == 'name_find':
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key, v = namePredicate(op, v)
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else:
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if k == '*':
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k = 'find__value'
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elif k not in ('id', 'user__username', 'type'):
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find_key = k
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k = 'find__value'
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key = k + get_operator(op, 'istr' if k in case_insensitive_keys else 'str')
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key = str(key)
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if find_key:
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return Q(**{'find__key': find_key, key: v})
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else:
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return Q(**{key: v})
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def parseConditions(conditions, operator, user, item=None):
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'''
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conditions: [
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{
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value: "war"
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}
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{
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key: "year",
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value: "1970-1980,
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operator: "!="
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},
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{
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key: "country",
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value: "f",
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operator: "^"
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}
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],
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operator: "&"
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'''
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conn = []
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for condition in conditions:
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if 'conditions' in condition:
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q = parseConditions(condition['conditions'],
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condition.get('operator', '&'), user, item)
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if q:
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conn.append(q)
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pass
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else:
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conn.append(parseCondition(condition, user, item))
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if conn:
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q = conn[0]
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for c in conn[1:]:
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if operator == '|':
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q = q | c
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else:
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q = q & c
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return q
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return None
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class EntityManager(Manager):
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def get_query_set(self):
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return QuerySet(self.model)
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def find(self, data, user, item=None):
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#join query with operator
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qs = self.get_query_set()
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query = data.get('query', {})
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conditions = parseConditions(query.get('conditions', []),
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query.get('operator', '&'),
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user, item)
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if conditions:
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qs = qs.filter(conditions)
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return qs
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