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from django.db.models import Transform
from django.db.models.lookups import PostgresOperatorLookup
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 = '&&'
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 = '%%>'
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