Nicer error message on has_many :through when :through reflection can not be found (closes #4042) [court3nay@gmail.com]

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@3910 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

2 files changed, 6 insertions, 0 deletions

diff --git a/activerecord/test/associations_join_model_test.rb b/activerecord/test/associations_join_model_test.rb
index 58208ced65..7395aa5739 100644
--- a/activerecord/test/associations_join_model_test.rb
+++ b/activerecord/test/associations_join_model_test.rb
@@ -207,6 +207,10 @@ class AssociationsJoinModelTest < Test::Unit::TestCase
     assert posts(:welcome, :reload)[:taggings_count].zero?
   end
 
+  def test_unavailable_through_reflection
+    assert_raises (ActiveRecord::ActiveRecordError) { authors(:david).nothings }
+  end
+
   private
     # create dynamic Post models to allow different dependency options
     def find_post_with_dependency(post_id, association, association_name, dependency)
diff --git a/activerecord/test/fixtures/author.rb b/activerecord/test/fixtures/author.rb
index 8c6cee51e4..0f0d1b12d9 100644
--- a/activerecord/test/fixtures/author.rb
+++ b/activerecord/test/fixtures/author.rb
@@ -22,6 +22,8 @@ class Author < ActiveRecord::Base
 
   has_many :categorizations
   has_many :categories, :through => :categorizations
+  
+  has_many :nothings, :through => :kateggorisatons, :class_name => 'Category'
 
   attr_accessor :post_log