blob: 9a34ea5d89ea411b1419142cbe4adb37a96de0f2 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
|
module Arel
class Aggregation < Compound
include Recursion::BaseCase
def initialize(relation)
@relation = relation
end
def selects
[]
end
def table_sql(formatter = Sql::TableReference.new(relation))
relation.to_sql(formatter)
end
def attributes
@attributes ||= relation.attributes.collect(&:to_attribute).collect { |a| a.bind(self) }
end
def ==(other)
Aggregation === other and
self.relation == other.relation
end
end
class Relation
def externalize
@externalized ||= aggregation?? Aggregation.new(self) : self
end
def aggregation?
false
end
end
end
|