JezK
Edit File: inner_join_association_test.rb
require "cases/helper" require 'models/post' require 'models/comment' require 'models/author' require 'models/category' require 'models/categorization' class InnerJoinAssociationTest < ActiveRecord::TestCase fixtures :authors, :posts, :comments, :categories, :categories_posts, :categorizations def test_construct_finder_sql_creates_inner_joins sql = Author.send(:construct_finder_sql, :joins => :posts) assert_match /INNER JOIN .?posts.? ON .?posts.?.author_id = authors.id/, sql end def test_construct_finder_sql_cascades_inner_joins sql = Author.send(:construct_finder_sql, :joins => {:posts => :comments}) assert_match /INNER JOIN .?posts.? ON .?posts.?.author_id = authors.id/, sql assert_match /INNER JOIN .?comments.? ON .?comments.?.post_id = posts.id/, sql end def test_construct_finder_sql_inner_joins_through_associations sql = Author.send(:construct_finder_sql, :joins => :categorized_posts) assert_match /INNER JOIN .?categorizations.?.*INNER JOIN .?posts.?/, sql end def test_construct_finder_sql_applies_association_conditions sql = Author.send(:construct_finder_sql, :joins => :categories_like_general, :conditions => "TERMINATING_MARKER") assert_match /INNER JOIN .?categories.? ON.*AND.*.?General.?.*TERMINATING_MARKER/, sql end def test_construct_finder_sql_unpacks_nested_joins sql = Author.send(:construct_finder_sql, :joins => {:posts => [[:comments]]}) assert_no_match /inner join.*inner join.*inner join/i, sql, "only two join clauses should be present" assert_match /INNER JOIN .?posts.? ON .?posts.?.author_id = authors.id/, sql assert_match /INNER JOIN .?comments.? ON .?comments.?.post_id = .?posts.?.id/, sql end def test_construct_finder_sql_ignores_empty_joins_hash sql = Author.send(:construct_finder_sql, :joins => {}) assert_no_match /JOIN/i, sql end def test_construct_finder_sql_ignores_empty_joins_array sql = Author.send(:construct_finder_sql, :joins => []) assert_no_match /JOIN/i, sql end def test_find_with_implicit_inner_joins_honors_readonly_without_select authors = Author.find(:all, :joins => :posts) assert !authors.empty?, "expected authors to be non-empty" assert authors.all? {|a| a.readonly? }, "expected all authors to be readonly" end def test_find_with_implicit_inner_joins_honors_readonly_with_select authors = Author.find(:all, :select => 'authors.*', :joins => :posts) assert !authors.empty?, "expected authors to be non-empty" assert authors.all? {|a| !a.readonly? }, "expected no authors to be readonly" end def test_find_with_implicit_inner_joins_honors_readonly_false authors = Author.find(:all, :joins => :posts, :readonly => false) assert !authors.empty?, "expected authors to be non-empty" assert authors.all? {|a| !a.readonly? }, "expected no authors to be readonly" end def test_find_with_implicit_inner_joins_does_not_set_associations authors = Author.find(:all, :select => 'authors.*', :joins => :posts) assert !authors.empty?, "expected authors to be non-empty" assert authors.all? {|a| !a.send(:instance_variable_names).include?("@posts")}, "expected no authors to have the @posts association loaded" end def test_count_honors_implicit_inner_joins real_count = Author.find(:all).sum{|a| a.posts.count } assert_equal real_count, Author.count(:joins => :posts), "plain inner join count should match the number of referenced posts records" end def test_calculate_honors_implicit_inner_joins real_count = Author.find(:all).sum{|a| a.posts.count } assert_equal real_count, Author.calculate(:count, 'authors.id', :joins => :posts), "plain inner join count should match the number of referenced posts records" end def test_calculate_honors_implicit_inner_joins_and_distinct_and_conditions real_count = Author.find(:all).select {|a| a.posts.any? {|p| p.title =~ /^Welcome/} }.length authors_with_welcoming_post_titles = Author.calculate(:count, 'authors.id', :joins => :posts, :distinct => true, :conditions => "posts.title like 'Welcome%'") assert_equal real_count, authors_with_welcoming_post_titles, "inner join and conditions should have only returned authors posting titles starting with 'Welcome'" end end