Código fuente para django.contrib.postgres.aggregates.general

from django.contrib.postgres.fields import JSONField
from django.db.models.aggregates import Aggregate

__all__ = [
    'ArrayAgg', 'BitAnd', 'BitOr', 'BoolAnd', 'BoolOr', 'JSONBAgg', 'StringAgg',
]



[documentos]class ArrayAgg(Aggregate):
    function = 'ARRAY_AGG'

    def convert_value(self, value, expression, connection, context):
        if not value:
            return []
        return value




[documentos]class BitAnd(Aggregate):
    function = 'BIT_AND'




[documentos]class BitOr(Aggregate):
    function = 'BIT_OR'




[documentos]class BoolAnd(Aggregate):
    function = 'BOOL_AND'




[documentos]class BoolOr(Aggregate):
    function = 'BOOL_OR'




[documentos]class JSONBAgg(Aggregate):
    function = 'JSONB_AGG'
    _output_field = JSONField()

    def convert_value(self, value, expression, connection, context):
        if not value:
            return []
        return value




[documentos]class StringAgg(Aggregate):
    function = 'STRING_AGG'
    template = "%(function)s(%(distinct)s%(expressions)s, '%(delimiter)s')"

    def __init__(self, expression, delimiter, distinct=False, **extra):
        distinct = 'DISTINCT ' if distinct else ''
        super(StringAgg, self).__init__(expression, delimiter=delimiter, distinct=distinct, **extra)

    def convert_value(self, value, expression, connection, context):
        if not value:
            return ''
        return value
Back to Top