48 lines
1.8 KiB
Python
48 lines
1.8 KiB
Python
from django.contrib.postgres.aggregates import StringAgg
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from django.contrib.postgres.search import (
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SearchQuery, SearchRank, SearchVector, TrigramSimilarity,
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)
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from django.db import models
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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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}
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# TODO add search highlighting
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# TODO add language support
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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, config=language
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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', delimiter=' '), weight='B', config=language)
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+ SearchVector(StringAgg('keywords__name', delimiter=' '), weight='B', config=language))
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search_rank = SearchRank(search_vectors, search_query)
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# the results from trigram were really, really bad
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# trigram = (
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# TrigramSimilarity('name', search_text)
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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(search=search_vectors, rank=search_rank)
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.filter(search=search_query)
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.order_by('-rank'))
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