69 lines
2.8 KiB
Python
69 lines
2.8 KiB
Python
from django.contrib.postgres.aggregates import StringAgg
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from django.contrib.postgres.search import SearchQuery, SearchRank, SearchVector
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from django.db import models
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from django.db.models import Q
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from django.utils import translation
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DICTIONARY = {
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# TODO find custom dictionaries - maybe from here https://www.postgresql.org/message-id/CAF4Au4x6X_wSXFwsQYE8q5o0aQZANrvYjZJ8uOnsiHDnOVPPEg%40mail.gmail.com
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# 'hy': 'Armenian',
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# 'ca': 'Catalan',
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# 'cs': 'Czech',
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'nl': 'dutch',
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'en': 'english',
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'fr': 'french',
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'de': 'german',
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'it': 'italian',
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# 'lv': 'Latvian',
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'es': 'spanish',
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'sv': 'swedish',
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}
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# TODO add schedule index rebuild
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class RecipeSearchManager(models.Manager):
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def search(self, search_text, space):
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language = DICTIONARY.get(translation.get_language(), 'simple')
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search_query = SearchQuery(
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search_text,
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config=language,
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search_type="websearch"
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)
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search_vectors = (
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SearchVector('search_vector')
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+ SearchVector(StringAgg('steps__ingredients__food__name__unaccent', delimiter=' '), weight='B', config=language)
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+ SearchVector(StringAgg('keywords__name__unaccent', delimiter=' '), weight='B', config=language))
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search_rank = SearchRank(search_vectors, search_query)
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# USING TRIGRAM BREAKS WEB SEARCH
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# ADDING MULTIPLE TRIGRAMS CREATES DUPLICATE RESULTS
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# DISTINCT NOT COMPAITBLE WITH ANNOTATE
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# trigram_name = (TrigramSimilarity('name', search_text))
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# trigram_description = (TrigramSimilarity('description', search_text))
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# trigram_food = (TrigramSimilarity('steps__ingredients__food__name', search_text))
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# trigram_keyword = (TrigramSimilarity('keywords__name', search_text))
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# adding additional trigrams created duplicates
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# + TrigramSimilarity('description', search_text)
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# + TrigramSimilarity('steps__ingredients__food__name', search_text)
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# + TrigramSimilarity('keywords__name', search_text)
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return (
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self.get_queryset()
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.annotate(
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search=search_vectors,
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rank=search_rank,
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# trigram=trigram_name+trigram_description+trigram_food+trigram_keyword
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# trigram_name=trigram_name,
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# trigram_description=trigram_description,
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# trigram_food=trigram_food,
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# trigram_keyword=trigram_keyword
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)
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.filter(
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Q(search=search_query)
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# | Q(trigram_name__gt=0.1)
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# | Q(name__icontains=search_text)
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# | Q(trigram_name__gt=0.2)
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# | Q(trigram_description__gt=0.2)
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# | Q(trigram_food__gt=0.2)
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# | Q(trigram_keyword__gt=0.2)
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)
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.order_by('-rank'))
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