65 lines
1.5 KiB
Python
65 lines
1.5 KiB
Python
from django.contrib.postgres.fields import ArrayField, JSONField
|
|
from django.db.models import Aggregate, Value
|
|
|
|
from .mixins import OrderableAggMixin
|
|
|
|
__all__ = [
|
|
'ArrayAgg', 'BitAnd', 'BitOr', 'BoolAnd', 'BoolOr', 'JSONBAgg', 'StringAgg',
|
|
]
|
|
|
|
|
|
class ArrayAgg(OrderableAggMixin, Aggregate):
|
|
function = 'ARRAY_AGG'
|
|
template = '%(function)s(%(distinct)s%(expressions)s %(ordering)s)'
|
|
allow_distinct = True
|
|
|
|
@property
|
|
def output_field(self):
|
|
return ArrayField(self.source_expressions[0].output_field)
|
|
|
|
def convert_value(self, value, expression, connection):
|
|
if not value:
|
|
return []
|
|
return value
|
|
|
|
|
|
class BitAnd(Aggregate):
|
|
function = 'BIT_AND'
|
|
|
|
|
|
class BitOr(Aggregate):
|
|
function = 'BIT_OR'
|
|
|
|
|
|
class BoolAnd(Aggregate):
|
|
function = 'BOOL_AND'
|
|
|
|
|
|
class BoolOr(Aggregate):
|
|
function = 'BOOL_OR'
|
|
|
|
|
|
class JSONBAgg(Aggregate):
|
|
function = 'JSONB_AGG'
|
|
output_field = JSONField()
|
|
|
|
def convert_value(self, value, expression, connection):
|
|
if not value:
|
|
return []
|
|
return value
|
|
|
|
|
|
class StringAgg(OrderableAggMixin, Aggregate):
|
|
function = 'STRING_AGG'
|
|
template = '%(function)s(%(distinct)s%(expressions)s %(ordering)s)'
|
|
allow_distinct = True
|
|
|
|
def __init__(self, expression, delimiter, **extra):
|
|
delimiter_expr = Value(str(delimiter))
|
|
super().__init__(expression, delimiter_expr, **extra)
|
|
|
|
def convert_value(self, value, expression, connection):
|
|
if not value:
|
|
return ''
|
|
return value
|