diff options
Diffstat (limited to 'activerecord/test/cases/relation/merging_test.rb')
-rw-r--r-- | activerecord/test/cases/relation/merging_test.rb | 147 |
1 files changed, 147 insertions, 0 deletions
diff --git a/activerecord/test/cases/relation/merging_test.rb b/activerecord/test/cases/relation/merging_test.rb new file mode 100644 index 0000000000..2b5c2fd5a4 --- /dev/null +++ b/activerecord/test/cases/relation/merging_test.rb @@ -0,0 +1,147 @@ +require 'cases/helper' +require 'models/author' +require 'models/comment' +require 'models/developer' +require 'models/post' +require 'models/project' + +class RelationMergingTest < ActiveRecord::TestCase + fixtures :developers, :comments, :authors, :posts + + def test_relation_merging + devs = Developer.where("salary >= 80000").merge(Developer.limit(2)).merge(Developer.order('id ASC').where("id < 3")) + assert_equal [developers(:david), developers(:jamis)], devs.to_a + + dev_with_count = Developer.limit(1).merge(Developer.order('id DESC')).merge(Developer.select('developers.*')) + assert_equal [developers(:poor_jamis)], dev_with_count.to_a + end + + def test_relation_to_sql + post = Post.first + sql = post.comments.to_sql + assert_match(/.?post_id.? = #{post.id}\Z/i, sql) + end + + def test_relation_merging_with_arel_equalities_keeps_last_equality + devs = Developer.where(Developer.arel_table[:salary].eq(80000)).merge( + Developer.where(Developer.arel_table[:salary].eq(9000)) + ) + assert_equal [developers(:poor_jamis)], devs.to_a + end + + def test_relation_merging_with_arel_equalities_keeps_last_equality_with_non_attribute_left_hand + salary_attr = Developer.arel_table[:salary] + devs = Developer.where( + Arel::Nodes::NamedFunction.new('abs', [salary_attr]).eq(80000) + ).merge( + Developer.where( + Arel::Nodes::NamedFunction.new('abs', [salary_attr]).eq(9000) + ) + ) + assert_equal [developers(:poor_jamis)], devs.to_a + end + + def test_relation_merging_with_eager_load + relations = [] + relations << Post.order('comments.id DESC').merge(Post.eager_load(:last_comment)).merge(Post.all) + relations << Post.eager_load(:last_comment).merge(Post.order('comments.id DESC')).merge(Post.all) + + relations.each do |posts| + post = posts.find { |p| p.id == 1 } + assert_equal Post.find(1).last_comment, post.last_comment + end + end + + def test_relation_merging_with_locks + devs = Developer.lock.where("salary >= 80000").order("id DESC").merge(Developer.limit(2)) + assert devs.locked.present? + end + + def test_relation_merging_with_preload + [Post.all.merge(Post.preload(:author)), Post.preload(:author).merge(Post.all)].each do |posts| + assert_queries(2) { assert posts.first.author } + end + end + + def test_relation_merging_with_joins + comments = Comment.joins(:post).where(:body => 'Thank you for the welcome').merge(Post.where(:body => 'Such a lovely day')) + assert_equal 1, comments.count + end + + def test_relation_merging_with_association + assert_queries(2) do # one for loading post, and another one merged query + post = Post.where(:body => 'Such a lovely day').first + comments = Comment.where(:body => 'Thank you for the welcome').merge(post.comments) + assert_equal 1, comments.count + end + end + + test "merge collapses wheres from the LHS only" do + left = Post.where(title: "omg").where(comments_count: 1) + right = Post.where(title: "wtf").where(title: "bbq") + + expected = [left.bind_values[1]] + right.bind_values + merged = left.merge(right) + + assert_equal expected, merged.bind_values + assert !merged.to_sql.include?("omg") + assert merged.to_sql.include?("wtf") + assert merged.to_sql.include?("bbq") + end + + def test_merging_keeps_lhs_bind_parameters + column = Post.columns_hash['id'] + binds = [[column, 20]] + + right = Post.where(id: 20) + left = Post.where(id: 10) + + merged = left.merge(right) + assert_equal binds, merged.bind_values + end + + def test_merging_reorders_bind_params + post = Post.first + right = Post.where(id: 1) + left = Post.where(title: post.title) + + merged = left.merge(right) + assert_equal post, merged.first + end + + def test_merging_compares_symbols_and_strings_as_equal + post = PostThatLoadsCommentsInAnAfterSaveHook.create!(title: "First Post", body: "Blah blah blah.") + assert_equal "First comment!", post.comments.where(body: "First comment!").first_or_create.body + end +end + +class MergingDifferentRelationsTest < ActiveRecord::TestCase + fixtures :posts, :authors + + test "merging where relations" do + hello_by_bob = Post.where(body: "hello").joins(:author). + merge(Author.where(name: "Bob")).order("posts.id").pluck("posts.id") + + assert_equal [posts(:misc_by_bob).id, + posts(:other_by_bob).id], hello_by_bob + end + + test "merging order relations" do + posts_by_author_name = Post.limit(3).joins(:author). + merge(Author.order(:name)).pluck("authors.name") + + assert_equal ["Bob", "Bob", "David"], posts_by_author_name + + posts_by_author_name = Post.limit(3).joins(:author). + merge(Author.order("name")).pluck("authors.name") + + assert_equal ["Bob", "Bob", "David"], posts_by_author_name + end + + test "merging order relations (using a hash argument)" do + posts_by_author_name = Post.limit(4).joins(:author). + merge(Author.order(name: :desc)).pluck("authors.name") + + assert_equal ["Mary", "Mary", "Mary", "David"], posts_by_author_name + end +end |