pandora/pandora/person/managers.py

149 lines
3.6 KiB
Python

# -*- coding: utf-8 -*-
# vi:si:et:sw=4:sts=4:ts=4
import unicodedata
from django.db.models import Q, Manager
from ox.django.query import QuerySet
from item.utils import decode_id
def parseCondition(condition, user):
'''
condition: {
value: "war"
}
or
condition: {
key: "year",
value: "1970-1980,
operator: "!="
}
...
'''
k = condition.get('key', 'name')
k = {
'user': 'user__username',
}.get(k, k)
if not k:
k = 'name'
v = condition['value']
op = condition.get('operator')
if not op:
op = '='
if op.startswith('!'):
op = op[1:]
exclude = True
else:
exclude = False
if op == '-':
q = parseCondition({'key': k, 'value': v[0], 'operator': '>='}, user) \
& parseCondition({'key': k, 'value': v[1], 'operator': '<'}, user)
if exclude:
return ~q
else:
return q
if k == 'id':
v = decode_id(v)
if isinstance(v, bool): #featured and public flag
key = k
elif k in ('lat', 'lng', 'area', 'south', 'west', 'north', 'east', 'matches', 'id'):
key = '%s%s' % (k, {
'>': '__gt',
'>=': '__gte',
'<': '__lt',
'<=': '__lte',
}.get(op,''))
else:
key = '%s%s' % (k, {
'==': '__iexact',
'^': '__istartswith',
'$': '__iendswith',
}.get(op,'__icontains'))
key = str(key)
if isinstance(v, unicode):
v = unicodedata.normalize('NFKD', v).lower()
if exclude:
q = ~Q(**{key: v})
else:
q = Q(**{key: v})
return q
def parseConditions(conditions, operator, user):
'''
conditions: [
{
value: "war"
}
{
key: "year",
value: "1970-1980,
operator: "!="
},
{
key: "country",
value: "f",
operator: "^"
}
],
operator: "&"
'''
conn = []
for condition in conditions:
if 'conditions' in condition:
q = parseConditions(condition['conditions'],
condition.get('operator', '&'), user)
if q:
conn.append(q)
pass
else:
conn.append(parseCondition(condition, user))
if conn:
q = conn[0]
for c in conn[1:]:
if operator == '|':
q = q | c
else:
q = q & c
return q
return None
class PersonManager(Manager):
def get_query_set(self):
return QuerySet(self.model)
def find(self, data, user):
'''
query: {
conditions: [
{
value: "war"
}
{
key: "year",
value: "1970-1980,
operator: "!="
},
{
key: "country",
value: "f",
operator: "^"
}
],
operator: "&"
}
'''
#join query with operator
qs = self.get_query_set()
query = data.get('query', {})
conditions = parseConditions(query.get('conditions', []),
query.get('operator', '&'),
user)
if conditions:
qs = qs.filter(conditions)
return qs