ajax_lexeme_slickgrid.py
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#-*- coding:utf-8 -*-
from hashlib import md5
from django.db.models import Count
from django.core.cache import cache
from dictionary.models import Lexeme, filter_visible, visible_vocabularies
from dictionary.ajax_slickgrid import SlickGridQuery
from common.decorators import ajax
from common.util import bisect_left, reverse, json_encode
import locale
locale.setlocale(locale.LC_ALL, 'pl_PL.UTF-8')
class LexemeQuery(SlickGridQuery):
model = Lexeme
search_field = 'entry'
sort_field_translation = {
'part_of_speech': 'part_of_speech__symbol',
}
filter_field_translation = {
'form': 'lexemeform__form',
'lexeme_qualifier': 'qualifiers__pk',
'lip_qualifier': 'lexemeinflectionpattern__qualifiers__pk',
'classification_value': 'classificationvalue__pk',
'pattern_name': 'lexemeinflectionpattern__pattern__name',
'inflection_characteristic':
'lexemeinflectionpattern__inflection_characteristic__symbol',
'containing_vocabulary': 'vocabularies__pk',
'owner_vocabulary': 'owner_vocabulary__pk',
'pattern_count': 'pc',
'ic_count': 'icc',
'cr_type': 'refs_to__type__pk',
}
def get_sort_field(self, rule):
new_rule = dict(rule)
if rule['field'] == 'entry' and rule['a_tergo']:
new_rule['field'] = 'rev'
return super(LexemeQuery, self).get_sort_field(new_rule)
def sort_queryset(self, queryset):
for rule in self.sort_rules:
if rule['field'] == 'entry' and rule['a_tergo']:
queryset = queryset.extra(select={'rev': "reverse(haslo)"})
return super(LexemeQuery, self).sort_queryset(queryset)
def apply_filter_rule(self, queryset, rule):
lookup = self.lookup_translation[rule['op']]
negated = (lookup[0] == '-')
field, data = rule['field'], rule['data']
if field == 'pattern_count':
queryset = queryset.annotate(
pc=Count('lexemeinflectionpattern__pattern', distinct=True))
elif field == 'ic_count':
queryset = queryset.annotate(
icc=Count('lexemeinflectionpattern__inflection_characteristic',
distinct=True))
elif field == 'qualifier':
where = '''(
exists (
select * from kwalifikatory_leksemow where lexeme_id = leksemy.id and
qualifier_id = %s) or
exists (
select * from kwalifikatory_odmieniasiow join odmieniasie o on
lexemeinflectionpattern_id = o.id
where
qualifier_id = %s and o.l_id = leksemy.id) or
exists (
select * from
odmieniasie o
join wzory w on (o.w_id = w.id)
join szablony_tabel s on (w.typ = s.wtyp and o.charfl = s.charfl)
join klatki k on k.st_id = s.id
join zakonczenia z on (o.w_id = z.w_id and k.efobaz = z.efobaz)
join kwalifikatory_zakonczen kz on (z.id = kz.ending_id)
where o.l_id = leksemy.id and s.wariant = '1' and
kz.qualifier_id = %s)
)'''
if negated:
where = 'not ' + where
queryset = queryset.extra(where=[where], params=[data] * 3)
return queryset
return super(LexemeQuery, self).apply_filter_rule(queryset, rule)
def get_queryset(self):
lexemes = super(LexemeQuery, self).get_queryset()
return filter_visible(lexemes, self.user)
def apply_mask(self, lexemes):
if self.mask == '':
return lexemes
for rule in self.sort_rules:
if rule['field'] == 'entry':
if not rule['a_tergo']:
matching_lexemes = lexemes.filter(
entry__istartswith=self.mask)
else:
matching_lexemes = lexemes.filter(
entry__iendswith=self.mask)
break
else:
matching_lexemes = lexemes.filter(entry__istartswith=self.mask)
return matching_lexemes
# nieużywane
def filter_value(self, queryset, rule, from_value, upward):
greater = (rule['order'] == 'asc') == upward
if rule['field'] == 'entry' and rule['a_tergo']:
if greater:
comp = '>='
else:
comp = '<='
return queryset.extra(where=["reverse(haslo) " + comp + " %s"],
params=[reverse(from_value)])
else:
return super(LexemeQuery, self).filter_value(
queryset, rule, from_value, upward)
def response_row(self, lexeme):
lip_data = lexeme.lip_data()
cont_vocabs = '/'.join(v.id for v in lexeme.vocabularies.all())
return {
'id': lexeme.id,
'entry': lexeme.entry,
'pos': lexeme.part_of_speech.symbol,
'patterns': lip_data['patterns'],
'ics': lip_data['inflection_characteristics'],
'vocabs': cont_vocabs,
'owner': lexeme.owner_vocabulary.id,
'status': dict(Lexeme.STATUS_CHOICES).get(lexeme.status),
}
# indeks wiersza w danym sortowaniu, w którym
# znajdzie się instancja o danym id
def row_index(self, lexeme_id):
id_list = self.get_id_list()
count = len(id_list)
if count == 0:
return 0, 0
return id_list.index(lexeme_id), count
def search_index(self):
id_list = self.get_id_list()
count = len(id_list)
if count == 0:
return 0
first_rule = self.sort_rules[0]
if first_rule['field'] != self.search_field:
return 0
index = bisect_left(id_list, self.mask,
cmp=make_lexeme_cmp(first_rule))
if index == count:
index -= 1
return index
def cache_key(self):
key = json_encode(self.sort_rules) + json_encode(self.filter)
for vocabulary in visible_vocabularies(self.user):
key += vocabulary.id
if self.filtering_mode():
key += self.mask
return md5(key).hexdigest()
def get_cached_lexemes(self):
key = self.cache_key()
return cache.get(key)
def cache_lexemes(self, id_list):
key = self.cache_key()
cache.set(key, id_list)
key_list = cache.get('key_list', [])
if key not in key_list:
key_list.append(key)
cache.set('key_list', key_list)
def get_id_list(self, force_reload=False):
if not force_reload:
id_list = self.get_cached_lexemes()
else:
id_list = None
if id_list is None:
lexemes = self.get_sorted_queryset()
if 'rev' in lexemes.query.extra_select:
id_list = list(row[0] for row in lexemes.values_list('id', 'rev'))
else:
id_list = list(lexemes.values_list('id', flat=True))
self.cache_lexemes(id_list)
return id_list
def make_lexeme_cmp(rule):
def lexeme_cmp(lexeme_id, mask):
e1 = Lexeme.objects.get(id=lexeme_id).entry
e2 = mask
if rule['a_tergo']:
e1 = reverse(e1)
e2 = reverse(e2)
result = locale.strcoll(e1, e2)
if rule['order'] == 'desc' and e2 != '':
result = -result
return result
return lexeme_cmp
# Zapytanie o indeks wiersza o pewnym id przy danym sortowaniu
@ajax(method='get')
def find_id(request, id, sort_rules, mask, filter=None):
query = LexemeQuery(
filter=filter, sort_rules=sort_rules, mask=mask, user=request.user)
index, count = LexemeQuery.row_index(id, query)
return {
'index': index,
'count': count,
}
@ajax(method='get')
def search_index(request, sort_rules, filter, search=''):
query = LexemeQuery(
filter=filter, sort_rules=sort_rules, mask=search, user=request.user)
return {
'index': query.search_index()
}
@ajax(method='get')
def get_lexemes(request, from_page, to_page, rows, sort_rules, filter,
mask='', force_reload=False):
request.session['sort_rules'] = sort_rules
request.session['filter'] = filter
query = LexemeQuery(
filter=filter, sort_rules=sort_rules, mask=mask, user=request.user)
id_list = query.get_id_list(force_reload)
count = len(id_list)
start, response_rowcount = query.count_pages(from_page, to_page, rows)
sublist = id_list[start:start + response_rowcount]
lexemes_qs = Lexeme.objects.filter(id__in=sublist).select_related(
'owner_vocabulary', 'part_of_speech').prefetch_related(
'lexemeinflectionpattern_set__pattern',
'lexemeinflectionpattern_set__inflection_characteristic',
'vocabularies')
lexemes_dict = dict((l.id, l) for l in lexemes_qs)
lexemes = [lexemes_dict[lexeme_id] for lexeme_id in sublist]
return query.make_response(lexemes, count, from_page)