diff options
| -rw-r--r-- | activerecord/lib/active_record/relation/finder_methods.rb | 14 | ||||
| -rw-r--r-- | activerecord/test/cases/finder_test.rb | 56 |
2 files changed, 36 insertions, 34 deletions
diff --git a/activerecord/lib/active_record/relation/finder_methods.rb b/activerecord/lib/active_record/relation/finder_methods.rb index 2d3bd563ac..0132a02f83 100644 --- a/activerecord/lib/active_record/relation/finder_methods.rb +++ b/activerecord/lib/active_record/relation/finder_methods.rb @@ -171,21 +171,21 @@ module ActiveRecord last or raise RecordNotFound end - # Returns truthy if a record exists in the table that matches the +id+ or - # conditions given, or falsy otherwise. The argument can take six forms: + # Returns +true+ if a record exists in the table that matches the +id+ or + # conditions given, or +false+ otherwise. The argument can take six forms: # # * Integer - Finds the record with this primary key. # * String - Finds the record with a primary key corresponding to this # string (such as <tt>'5'</tt>). # * Array - Finds the record that matches these +find+-style conditions - # (such as <tt>['color = ?', 'red']</tt>). + # (such as <tt>['name LIKE ?', "%#{query}%"]</tt>). # * Hash - Finds the record that matches these +find+-style conditions - # (such as <tt>{color: 'red'}</tt>). + # (such as <tt>{name: 'David'}</tt>). # * +false+ - Returns always +false+. # * No args - Returns +false+ if the table is empty, +true+ otherwise. # - # For more information about specifying conditions as a Hash or Array, - # see the Conditions section in the introduction to ActiveRecord::Base. + # For more information about specifying conditions as a hash or array, + # see the Conditions section in the introduction to <tt>ActiveRecord::Base</tt>. # # Note: You can't pass in a condition as a string (like <tt>name = # 'Jamie'</tt>), since it would be sanitized and then queried against @@ -213,7 +213,7 @@ module ActiveRecord relation = relation.where(table[primary_key].eq(conditions)) if conditions != :none end - connection.select_value(relation.arel, "#{name} Exists", relation.bind_values) + connection.select_value(relation, "#{name} Exists", relation.bind_values) ? true : false end # This method is called whenever no records are found with either a single diff --git a/activerecord/test/cases/finder_test.rb b/activerecord/test/cases/finder_test.rb index 51a8a13d04..949e994f8d 100644 --- a/activerecord/test/cases/finder_test.rb +++ b/activerecord/test/cases/finder_test.rb @@ -45,17 +45,18 @@ class FinderTest < ActiveRecord::TestCase end def test_exists - assert Topic.exists?(1) - assert Topic.exists?("1") - assert Topic.exists?(title: "The First Topic") - assert Topic.exists?(heading: "The First Topic") - assert Topic.exists?(:author_name => "Mary", :approved => true) - assert Topic.exists?(["parent_id = ?", 1]) - assert !Topic.exists?(45) - assert !Topic.exists?(Topic.new) + assert_equal true, Topic.exists?(1) + assert_equal true, Topic.exists?("1") + assert_equal true, Topic.exists?(title: "The First Topic") + assert_equal true, Topic.exists?(heading: "The First Topic") + assert_equal true, Topic.exists?(:author_name => "Mary", :approved => true) + assert_equal true, Topic.exists?(["parent_id = ?", 1]) + + assert_equal false, Topic.exists?(45) + assert_equal false, Topic.exists?(Topic.new) begin - assert !Topic.exists?("foo") + assert_equal false, Topic.exists?("foo") rescue ActiveRecord::StatementInvalid # PostgreSQL complains about string comparison with integer field rescue Exception @@ -72,61 +73,62 @@ class FinderTest < ActiveRecord::TestCase end def test_exists_returns_true_with_one_record_and_no_args - assert Topic.exists? + assert_equal true, Topic.exists? end def test_exists_returns_false_with_false_arg - assert !Topic.exists?(false) + assert_equal false, Topic.exists?(false) end # exists? should handle nil for id's that come from URLs and always return false # (example: Topic.exists?(params[:id])) where params[:id] is nil def test_exists_with_nil_arg - assert !Topic.exists?(nil) - assert Topic.exists? - assert !Topic.first.replies.exists?(nil) - assert Topic.first.replies.exists? + assert_equal false, Topic.exists?(nil) + assert_equal true, Topic.exists? + + assert_equal false, Topic.first.replies.exists?(nil) + assert_equal true, Topic.first.replies.exists? end # ensures +exists?+ runs valid SQL by excluding order value def test_exists_with_order - assert Topic.order(:id).distinct.exists? + assert_equal true, Topic.order(:id).distinct.exists? end def test_exists_with_includes_limit_and_empty_result - assert !Topic.includes(:replies).limit(0).exists? - assert !Topic.includes(:replies).limit(1).where('0 = 1').exists? + assert_equal false, Topic.includes(:replies).limit(0).exists? + assert_equal false, Topic.includes(:replies).limit(1).where('0 = 1').exists? end def test_exists_with_distinct_association_includes_and_limit author = Author.first - assert !author.unique_categorized_posts.includes(:special_comments).limit(0).exists? - assert author.unique_categorized_posts.includes(:special_comments).limit(1).exists? + assert_equal false, author.unique_categorized_posts.includes(:special_comments).limit(0).exists? + assert_equal true, author.unique_categorized_posts.includes(:special_comments).limit(1).exists? end def test_exists_with_distinct_association_includes_limit_and_order author = Author.first - assert !author.unique_categorized_posts.includes(:special_comments).order('comments.taggings_count DESC').limit(0).exists? - assert author.unique_categorized_posts.includes(:special_comments).order('comments.taggings_count DESC').limit(1).exists? + assert_equal false, author.unique_categorized_posts.includes(:special_comments).order('comments.taggings_count DESC').limit(0).exists? + assert_equal true, author.unique_categorized_posts.includes(:special_comments).order('comments.taggings_count DESC').limit(1).exists? end def test_exists_with_empty_table_and_no_args_given Topic.delete_all - assert !Topic.exists? + assert_equal false, Topic.exists? end def test_exists_with_aggregate_having_three_mappings existing_address = customers(:david).address - assert Customer.exists?(:address => existing_address) + assert_equal true, Customer.exists?(:address => existing_address) end def test_exists_with_aggregate_having_three_mappings_with_one_difference existing_address = customers(:david).address - assert !Customer.exists?(:address => + assert_equal false, Customer.exists?(:address => Address.new(existing_address.street, existing_address.city, existing_address.country + "1")) - assert !Customer.exists?(:address => + assert_equal false, Customer.exists?(:address => Address.new(existing_address.street, existing_address.city + "1", existing_address.country)) - assert !Customer.exists?(:address => + assert_equal false, Customer.exists?(:address => Address.new(existing_address.street + "1", existing_address.city, existing_address.country)) end |