blob: f389b18c54cd9b1267b500ec57eb661a5b2cd296 (
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
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
|
require File.join(File.dirname(__FILE__), '..', '..', '..', 'spec_helper')
module Arel
describe Project do
before do
@relation = Table.new(:users)
@attribute = @relation[:id]
end
describe '#attributes' do
before do
@projection = Project.new(@relation, @attribute)
end
it "manufactures attributes associated with the projection relation" do
@projection.attributes.should == [@attribute].collect { |a| a.bind(@projection) }
end
end
describe '#to_sql' do
describe 'when given an attribute' do
it "manufactures sql with a limited select clause" do
Project.new(@relation, @attribute).to_sql.should be_like("
SELECT `users`.`id`
FROM `users`
")
end
end
describe 'when given a relation' do
before do
@scalar_relation = Project.new(@relation, @relation[:name])
end
it "manufactures sql with scalar selects" do
Project.new(@relation, @scalar_relation).to_sql.should be_like("
SELECT (SELECT `users`.`name` FROM `users`) AS `users` FROM `users`
")
end
end
describe 'when given a string' do
it "passes the string through to the select clause" do
Project.new(@relation, 'asdf').to_sql.should be_like("
SELECT asdf FROM `users`
")
end
end
describe 'when given an expression' do
it 'manufactures sql with expressions' do
@relation.project(@attribute.count).to_sql.should be_like("
SELECT COUNT(`users`.`id`) AS count_id
FROM `users`
")
end
it 'manufactures sql with distinct expressions' do
@relation.project(@attribute.count(true)).to_sql.should be_like("
SELECT COUNT(DISTINCT `users`.`id`) AS count_id
FROM `users`
")
end
end
end
describe '#externalizable?' do
describe 'when the projections are attributes' do
it 'returns false' do
Project.new(@relation, @attribute).should_not be_externalizable
end
end
describe 'when the projections include an aggregation' do
it "obtains" do
Project.new(@relation, @attribute.sum).should be_externalizable
end
end
end
end
end
|
