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require "cases/helper"
require "models/post"
require "models/comment"
require "models/author"
require "models/essay"
require "models/categorization"
require "models/person"
class LeftOuterJoinAssociationTest < ActiveRecord::TestCase
fixtures :authors, :author_addresses, :essays, :posts, :comments, :categorizations, :people
def test_construct_finder_sql_applies_aliases_tables_on_association_conditions
result = Author.left_outer_joins(:thinking_posts, :welcome_posts).to_a
assert_equal authors(:david), result.first
end
def test_construct_finder_sql_does_not_table_name_collide_on_duplicate_associations
assert_nothing_raised do
queries = capture_sql do
Person.left_outer_joins(agents: { agents: :agents })
.left_outer_joins(agents: { agents: { primary_contact: :agents } }).to_a
end
assert queries.any? { |sql| /agents_people_4/i.match?(sql) }
end
end
def test_left_outer_joins_count_is_same_as_size_of_loaded_results
assert_equal 17, Post.left_outer_joins(:comments).to_a.size
assert_equal 17, Post.left_outer_joins(:comments).count
end
def test_left_joins_aliases_left_outer_joins
assert_equal Post.left_outer_joins(:comments).to_sql, Post.left_joins(:comments).to_sql
end
def test_left_outer_joins_return_has_value_for_every_comment
all_post_ids = Post.pluck(:id)
assert_equal all_post_ids, all_post_ids & Post.left_outer_joins(:comments).pluck(:id)
end
def test_left_outer_joins_actually_does_a_left_outer_join
queries = capture_sql { Author.left_outer_joins(:posts).to_a }
assert queries.any? { |sql| /LEFT OUTER JOIN/i.match?(sql) }
end
def test_construct_finder_sql_ignores_empty_left_outer_joins_hash
queries = capture_sql { Author.left_outer_joins({}).to_a }
assert queries.none? { |sql| /LEFT OUTER JOIN/i.match?(sql) }
end
def test_construct_finder_sql_ignores_empty_left_outer_joins_array
queries = capture_sql { Author.left_outer_joins([]).to_a }
assert queries.none? { |sql| /LEFT OUTER JOIN/i.match?(sql) }
end
def test_left_outer_joins_forbids_to_use_string_as_argument
assert_raise(ArgumentError) { Author.left_outer_joins('LEFT OUTER JOIN "posts" ON "posts"."user_id" = "users"."id"').to_a }
end
def test_join_conditions_added_to_join_clause
queries = capture_sql { Author.left_outer_joins(:essays).to_a }
assert queries.any? { |sql| /writer_type.*?=.*?(Author|\?|\$1|\:a1)/i.match?(sql) }
assert queries.none? { |sql| /WHERE/i.match?(sql) }
end
def test_find_with_sti_join
scope = Post.left_outer_joins(:special_comments).where(id: posts(:sti_comments).id)
# The join should match SpecialComment and its subclasses only
assert scope.where("comments.type" => "Comment").empty?
assert !scope.where("comments.type" => "SpecialComment").empty?
assert !scope.where("comments.type" => "SubSpecialComment").empty?
end
def test_does_not_override_select
authors = Author.select("authors.name, #{%{(authors.author_address_id || ' ' || authors.author_address_extra_id) as addr_id}}").left_outer_joins(:posts)
assert authors.any?
assert authors.first.respond_to?(:addr_id)
end
test "the default scope of the target is applied when joining associations" do
author = Author.create! name: "Jon"
author.categorizations.create!
author.categorizations.create! special: true
assert_equal [author], Author.where(id: author).left_outer_joins(:special_categorizations)
end
end
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