aboutsummaryrefslogtreecommitdiffstats
path: root/activerecord/test/cases/relation_test.rb
blob: 0f446e06aaac6a5b9d69f474d12f9c4e4b01aa9a (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
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
# frozen_string_literal: true

require "cases/helper"
require "models/post"
require "models/comment"
require "models/author"
require "models/rating"

module ActiveRecord
  class RelationTest < ActiveRecord::TestCase
    fixtures :posts, :comments, :authors, :author_addresses, :ratings

    def test_construction
      relation = Relation.new(FakeKlass, table: :b)
      assert_equal FakeKlass, 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(FakeKlass)
      assert_equal FakeKlass, relation.model
    end

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

    def test_multi_value_initialize
      relation = Relation.new(FakeKlass)
      Relation::MULTI_VALUE_METHODS.each do |method|
        values = relation.send("#{method}_values")
        assert_equal [], values, method.to_s
        assert_predicate values, :frozen?, method.to_s
      end
    end

    def test_extensions
      relation = Relation.new(FakeKlass)
      assert_equal [], relation.extensions
    end

    def test_empty_where_values_hash
      relation = Relation.new(FakeKlass)
      assert_equal({}, relation.where_values_hash)
    end

    def test_has_values
      relation = Relation.new(Post)
      relation.where!(id: 10)
      assert_equal({ "id" => 10 }, relation.where_values_hash)
    end

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

    def test_scope_for_create
      relation = Relation.new(FakeKlass)
      assert_equal({}, relation.scope_for_create)
    end

    def test_create_with_value
      relation = Relation.new(Post)
      relation.create_with_value = { hello: "world" }
      assert_equal({ "hello" => "world" }, relation.scope_for_create)
    end

    def test_create_with_value_with_wheres
      relation = Relation.new(Post)
      assert_equal({}, relation.scope_for_create)

      relation.where!(id: 10)
      assert_equal({ "id" => 10 }, relation.scope_for_create)

      relation.create_with_value = { hello: "world" }
      assert_equal({ "hello" => "world", "id" => 10 }, relation.scope_for_create)
    end

    def test_empty_scope
      relation = Relation.new(Post)
      assert_predicate relation, :empty_scope?

      relation.merge!(relation)
      assert_predicate relation, :empty_scope?
    end

    def test_bad_constants_raise_errors
      assert_raises(NameError) do
        ActiveRecord::Relation::HelloWorld
      end
    end

    def test_empty_eager_loading?
      relation = Relation.new(FakeKlass)
      assert_not_predicate relation, :eager_loading?
    end

    def test_eager_load_values
      relation = Relation.new(FakeKlass)
      relation.eager_load! :b
      assert_predicate relation, :eager_loading?
    end

    def test_references_values
      relation = Relation.new(FakeKlass)
      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(FakeKlass)
      relation = relation.references(:foo).references(:foo)
      assert_equal ["foo"], relation.references_values
    end

    test "merging a hash into a relation" do
      relation = Relation.new(Post)
      relation = relation.merge where: { name: :lol }, readonly: true

      assert_equal({ "name" => :lol }, relation.where_clause.to_h)
      assert_equal true, relation.readonly_value
    end

    test "merging an empty hash into a relation" do
      assert_equal Relation::WhereClause.empty, Relation.new(FakeKlass).merge({}).where_clause
    end

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

    test "merging nil or false raises" do
      relation = Relation.new(FakeKlass)

      e = assert_raises(ArgumentError) do
        relation = relation.merge nil
      end

      assert_equal "invalid argument: nil.", e.message

      e = assert_raises(ArgumentError) do
        relation = relation.merge false
      end

      assert_equal "invalid argument: false.", e.message
    end

    test "#values returns a dup of the values" do
      relation = Relation.new(Post).where!(name: :foo)
      values   = relation.values

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

    test "relations can be created with a values hash" do
      relation = Relation.new(FakeKlass, values: { select: [:foo] })
      assert_equal [:foo], relation.select_values
    end

    test "merging a hash interpolates conditions" do
      klass = Class.new(FakeKlass) do
        def self.sanitize_sql(args)
          raise unless args == ["foo = ?", "bar"]
          "foo = bar"
        end
      end

      relation = Relation.new(klass)
      relation.merge!(where: ["foo = ?", "bar"])
      assert_equal Relation::WhereClause.new(["foo = bar"]), relation.where_clause
    end

    def test_merging_readonly_false
      relation = Relation.new(FakeKlass)
      readonly_false_relation = relation.readonly(false)
      # test merging in both directions
      assert_equal false, relation.merge(readonly_false_relation).readonly_value
      assert_equal false, readonly_false_relation.merge(relation).readonly_value
    end

    def test_relation_merging_with_merged_joins_as_symbols
      special_comments_with_ratings = SpecialComment.joins(:ratings)
      posts_with_special_comments_with_ratings = Post.group("posts.id").joins(:special_comments).merge(special_comments_with_ratings)
      assert_equal({ 4 => 2 }, authors(:david).posts.merge(posts_with_special_comments_with_ratings).count)
    end

    def test_relation_merging_with_merged_symbol_joins_keeps_inner_joins
      queries = capture_sql { Author.joins(:posts).merge(Post.joins(:comments)).to_a }

      nb_inner_join = queries.sum { |sql| sql.scan(/INNER\s+JOIN/i).size }
      assert_equal 2, nb_inner_join, "Wrong amount of INNER JOIN in query"
      assert queries.none? { |sql| /LEFT\s+(OUTER)?\s+JOIN/i.match?(sql) }, "Shouldn't have any LEFT JOIN in query"
    end

    def test_relation_merging_with_merged_symbol_joins_has_correct_size_and_count
      # Has one entry per comment
      merged_authors_with_commented_posts_relation = Author.joins(:posts).merge(Post.joins(:comments))

      post_ids_with_author = Post.joins(:author).pluck(:id)
      manual_comments_on_post_that_have_author = Comment.where(post_id: post_ids_with_author).pluck(:id)

      assert_equal manual_comments_on_post_that_have_author.size, merged_authors_with_commented_posts_relation.count
      assert_equal manual_comments_on_post_that_have_author.size, merged_authors_with_commented_posts_relation.to_a.size
    end

    def test_relation_merging_with_joins_as_join_dependency_pick_proper_parent
      post = Post.create!(title: "haha", body: "huhu")
      comment = post.comments.create!(body: "hu")
      3.times { comment.ratings.create! }

      relation = Post.joins(:comments).merge Comment.joins(:ratings)

      assert_equal 3, relation.where(id: post.id).pluck(:id).size
    end

    def test_merge_raises_with_invalid_argument
      assert_raises ArgumentError do
        relation = Relation.new(FakeKlass)
        relation.merge(true)
      end
    end

    def test_respond_to_for_non_selected_element
      post = Post.select(:title).first
      assert_not_respond_to post, :body, "post should not respond_to?(:body) since invoking it raises exception"

      silence_warnings { post = Post.select("'title' as post_title").first }
      assert_not_respond_to post, :title, "post should not respond_to?(:body) since invoking it raises exception"
    end

    def test_select_quotes_when_using_from_clause
      skip_if_sqlite3_version_includes_quoting_bug
      quoted_join = ActiveRecord::Base.connection.quote_table_name("join")
      selected = Post.select(:join).from(Post.select("id as #{quoted_join}")).map(&:join)
      assert_equal Post.pluck(:id), selected
    end

    def test_selecting_aliased_attribute_quotes_column_name_when_from_is_used
      skip_if_sqlite3_version_includes_quoting_bug
      klass = Class.new(ActiveRecord::Base) do
        self.table_name = :test_with_keyword_column_name
        alias_attribute :description, :desc
      end
      klass.create!(description: "foo")

      assert_equal ["foo"], klass.select(:description).from(klass.all).map(&:desc)
    end

    def test_relation_merging_with_merged_joins_as_strings
      join_string = "LEFT OUTER JOIN #{Rating.quoted_table_name} ON #{SpecialComment.quoted_table_name}.id = #{Rating.quoted_table_name}.comment_id"
      special_comments_with_ratings = SpecialComment.joins join_string
      posts_with_special_comments_with_ratings = Post.group("posts.id").joins(:special_comments).merge(special_comments_with_ratings)
      assert_equal({ 2 => 1, 4 => 3, 5 => 1 }, authors(:david).posts.merge(posts_with_special_comments_with_ratings).count)
    end

    def test_relation_merging_keeps_joining_order
      authors  = Author.where(id: 1)
      posts    = Post.joins(:author).merge(authors)
      comments = Comment.joins(:post).merge(posts)
      ratings  = Rating.joins(:comment).merge(comments)

      assert_equal 3, ratings.count
    end

    class EnsureRoundTripTypeCasting < ActiveRecord::Type::Value
      def type
        :string
      end

      def cast(value)
        raise value unless value == "value from user"
        "cast value"
      end

      def deserialize(value)
        raise value unless value == "type cast for database"
        "type cast from database"
      end

      def serialize(value)
        raise value unless value == "cast value"
        "type cast for database"
      end
    end

    class UpdateAllTestModel < ActiveRecord::Base
      self.table_name = "posts"

      attribute :body, EnsureRoundTripTypeCasting.new
    end

    def test_update_all_goes_through_normal_type_casting
      UpdateAllTestModel.update_all(body: "value from user", type: nil) # No STI

      assert_equal "type cast from database", UpdateAllTestModel.first.body
    end

    def test_skip_preloading_after_arel_has_been_generated
      assert_nothing_raised do
        relation = Comment.all
        relation.arel
        relation.skip_preloading!
      end
    end

    private

      def skip_if_sqlite3_version_includes_quoting_bug
        if sqlite3_version_includes_quoting_bug?
          skip <<-ERROR.squish
            You are using an outdated version of SQLite3 which has a bug in
            quoted column names. Please update SQLite3 and rebuild the sqlite3
            ruby gem
          ERROR
        end
      end

      def sqlite3_version_includes_quoting_bug?
        if current_adapter?(:SQLite3Adapter)
          selected_quoted_column_names = ActiveRecord::Base.connection.exec_query(
            'SELECT "join" FROM (SELECT id AS "join" FROM posts) subquery'
          ).columns
          ["join"] != selected_quoted_column_names
        end
      end
  end
end