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from django.db.models import Transform
from django.db.models.lookups import PostgresOperatorLookup
from django.db.models.sql.query import Query
from .search import SearchVector, SearchVectorExact, SearchVectorField
class DataContains(PostgresOperatorLookup):
lookup_name = "contains"
postgres_operator = "@>"
class ContainedBy(PostgresOperatorLookup):
lookup_name = "contained_by"
postgres_operator = "<@"
class Overlap(PostgresOperatorLookup):
lookup_name = "overlap"
postgres_operator = "&&"
def get_prep_lookup(self):
from .expressions import ArraySubquery
if isinstance(self.rhs, Query):
self.rhs = ArraySubquery(self.rhs)
return super().get_prep_lookup()
class HasKey(PostgresOperatorLookup):
lookup_name = "has_key"
postgres_operator = "?"
prepare_rhs = False
class HasKeys(PostgresOperatorLookup):
lookup_name = "has_keys"
postgres_operator = "?&"
def get_prep_lookup(self):
return [str(item) for item in self.rhs]
class HasAnyKeys(HasKeys):
lookup_name = "has_any_keys"
postgres_operator = "?|"
class Unaccent(Transform):
bilateral = True
lookup_name = "unaccent"
function = "UNACCENT"
class SearchLookup(SearchVectorExact):
lookup_name = "search"
def process_lhs(self, qn, connection):
if not isinstance(self.lhs.output_field, SearchVectorField):
config = getattr(self.rhs, "config", None)
self.lhs = SearchVector(self.lhs, config=config)
lhs, lhs_params = super().process_lhs(qn, connection)
return lhs, lhs_params
class TrigramSimilar(PostgresOperatorLookup):
lookup_name = "trigram_similar"
postgres_operator = "%%"
class TrigramWordSimilar(PostgresOperatorLookup):
lookup_name = "trigram_word_similar"
postgres_operator = "%%>"
class TrigramStrictWordSimilar(PostgresOperatorLookup):
lookup_name = "trigram_strict_word_similar"
postgres_operator = "%%>>"
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