aboutsummaryrefslogtreecommitdiffstats
path: root/activerecord/test/cases/relation_test.rb
blob: 98e278df827ea37b0d330c9bb50f91b771b9b564 (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
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
require "cases/helper"
require 'models/post'
require 'models/comment'

module ActiveRecord
  class RelationTest < ActiveRecord::TestCase
    fixtures :posts, :comments

    class FakeKlass < Struct.new(:table_name)
    end

    def test_construction
      relation = nil
      assert_nothing_raised do
        relation = Relation.new :a, :b
      end
      assert_equal :a, relation.klass
      assert_equal :b, relation.table
      assert !relation.loaded, 'relation is not loaded'
    end

    def test_responds_to_model_and_returns_klass
      relation = Relation.new :a, :b
      assert_equal :a, relation.model
    end

    def test_initialize_single_values
      relation = Relation.new :a, :b
      (Relation::SINGLE_VALUE_METHODS - [:create_with]).each do |method|
        assert_nil relation.send("#{method}_value"), method.to_s
      end
      assert_equal({}, relation.create_with_value)
    end

    def test_multi_value_initialize
      relation = Relation.new :a, :b
      Relation::MULTI_VALUE_METHODS.each do |method|
        assert_equal [], relation.send("#{method}_values"), method.to_s
      end
    end

    def test_extensions
      relation = Relation.new :a, :b
      assert_equal [], relation.extensions
    end

    def test_empty_where_values_hash
      relation = Relation.new :a, :b
      assert_equal({}, relation.where_values_hash)

      relation.where! :hello
      assert_equal({}, relation.where_values_hash)
    end

    def test_has_values
      relation = Relation.new Post, Post.arel_table
      relation.where! relation.table[:id].eq(10)
      assert_equal({:id => 10}, relation.where_values_hash)
    end

    def test_values_wrong_table
      relation = Relation.new Post, Post.arel_table
      relation.where! Comment.arel_table[:id].eq(10)
      assert_equal({}, relation.where_values_hash)
    end

    def test_tree_is_not_traversed
      relation = Relation.new Post, Post.arel_table
      left     = relation.table[:id].eq(10)
      right    = relation.table[:id].eq(10)
      combine  = left.and right
      relation.where! combine
      assert_equal({}, relation.where_values_hash)
    end

    def test_table_name_delegates_to_klass
      relation = Relation.new FakeKlass.new('foo'), :b
      assert_equal 'foo', relation.table_name
    end

    def test_scope_for_create
      relation = Relation.new :a, :b
      assert_equal({}, relation.scope_for_create)
    end

    def test_create_with_value
      relation = Relation.new Post, Post.arel_table
      hash = { :hello => 'world' }
      relation.create_with_value = hash
      assert_equal hash, relation.scope_for_create
    end

    def test_create_with_value_with_wheres
      relation = Relation.new Post, Post.arel_table
      relation.where! relation.table[:id].eq(10)
      relation.create_with_value = {:hello => 'world'}
      assert_equal({:hello => 'world', :id => 10}, relation.scope_for_create)
    end

    # FIXME: is this really wanted or expected behavior?
    def test_scope_for_create_is_cached
      relation = Relation.new Post, Post.arel_table
      assert_equal({}, relation.scope_for_create)

      relation.where! relation.table[:id].eq(10)
      assert_equal({}, relation.scope_for_create)

      relation.create_with_value = {:hello => 'world'}
      assert_equal({}, relation.scope_for_create)
    end

    def test_empty_eager_loading?
      relation = Relation.new :a, :b
      assert !relation.eager_loading?
    end

    def test_eager_load_values
      relation = Relation.new :a, :b
      relation.eager_load! :b
      assert relation.eager_loading?
    end

    def test_references_values
      relation = Relation.new :a, :b
      assert_equal [], relation.references_values
      relation = relation.references(:foo).references(:omg, :lol)
      assert_equal ['foo', 'omg', 'lol'], relation.references_values
    end

    def test_references_values_dont_duplicate
      relation = Relation.new :a, :b
      relation = relation.references(:foo).references(:foo)
      assert_equal ['foo'], relation.references_values
    end

    test 'merging a hash into a relation' do
      relation = Relation.new :a, :b
      relation = relation.merge where: :lol, readonly: true

      assert_equal [:lol], relation.where_values
      assert_equal true, relation.readonly_value
    end

    test 'merging an empty hash into a relation' do
      assert_equal [], Relation.new(:a, :b).merge({}).where_values
    end

    test 'merging a hash with unknown keys raises' do
      assert_raises(ArgumentError) { Relation::HashMerger.new(nil, omg: 'lol') }
    end

    test '#values returns a dup of the values' do
      relation = Relation.new(:a, :b).where! :foo
      values   = relation.values

      values[:where] = nil
      assert_not_nil relation.where_values
    end

    test 'relations can be created with a values hash' do
      relation = Relation.new(:a, :b, where: [:foo])
      assert_equal [:foo], relation.where_values
    end

    test 'merging a single where value' do
      relation = Relation.new(:a, :b)
      relation.merge!(where: :foo)
      assert_equal [:foo], relation.where_values
    end

    test 'merging a hash interpolates conditions' do
      klass = stub
      klass.stubs(:sanitize_sql).with(['foo = ?', 'bar']).returns('foo = bar')

      relation = Relation.new(klass, :b)
      relation.merge!(where: ['foo = ?', 'bar'])
      assert_equal ['foo = bar'], relation.where_values
    end
  end

  class RelationMutationTest < ActiveSupport::TestCase
    def relation
      @relation ||= Relation.new :a, :b
    end

    (Relation::MULTI_VALUE_METHODS - [:references, :extending]).each do |method|
      test "##{method}!" do
        assert relation.public_send("#{method}!", :foo).equal?(relation)
        assert_equal [:foo], relation.public_send("#{method}_values")
      end
    end

    test '#references!' do
      assert relation.references!(:foo).equal?(relation)
      assert relation.references_values.include?('foo')
    end

    test 'extending!' do
      mod, mod2 = Module.new, Module.new

      assert relation.extending!(mod).equal?(relation)
      assert_equal [mod], relation.extending_values
      assert relation.is_a?(mod)

      relation.extending!(mod2)
      assert_equal [mod, mod2], relation.extending_values
    end

    test 'extending! with empty args' do
      relation.extending!
      assert_equal [], relation.extending_values
    end

    (Relation::SINGLE_VALUE_METHODS - [:from, :lock, :reordering, :reverse_order, :create_with]).each do |method|
      test "##{method}!" do
        assert relation.public_send("#{method}!", :foo).equal?(relation)
        assert_equal :foo, relation.public_send("#{method}_value")
      end
    end

    test '#from!' do
      assert relation.from!('foo').equal?(relation)
      assert_equal ['foo', nil], relation.from_value
    end

    test '#lock!' do
      assert relation.lock!('foo').equal?(relation)
      assert_equal 'foo', relation.lock_value
    end

    test '#reorder!' do
      relation = self.relation.order('foo')

      assert relation.reorder!('bar').equal?(relation)
      assert_equal ['bar'], relation.order_values
      assert relation.reordering_value
    end

    test 'reverse_order!' do
      assert relation.reverse_order!.equal?(relation)
      assert relation.reverse_order_value
      relation.reverse_order!
      assert !relation.reverse_order_value
    end

    test 'create_with!' do
      assert relation.create_with!(foo: 'bar').equal?(relation)
      assert_equal({foo: 'bar'}, relation.create_with_value)
    end

    test 'merge!' do
      assert relation.merge!(where: :foo).equal?(relation)
      assert_equal [:foo], relation.where_values
    end

    test 'merge with a proc' do
      assert_equal [:foo], relation.merge(-> { where(:foo) }).where_values
    end

    test 'none!' do
      assert relation.none!.equal?(relation)
      assert_equal [NullRelation], relation.extending_values
      assert relation.is_a?(NullRelation)
    end
  end
end