Added Base.validate_uniqueness thatv alidates whether the value of the specified attributes are unique across the system. Useful for making sure that only one user can be named "davidhh".

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@108 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

1 files changed, 18 insertions, 0 deletions

diff --git a/activerecord/test/validations_test.rb b/activerecord/test/validations_test.rb
index 2d6c795d92..1abdfa062d 100755
--- a/activerecord/test/validations_test.rb
+++ b/activerecord/test/validations_test.rb
@@ -172,4 +172,22 @@ class ValidationsTest < Test::Unit::TestCase
     
     assert t.save
   end
+  
+  def test_validate_uniqueness
+    Topic.validate_uniqueness(:title)
+    
+    t = Topic.new("title" => "I'm unique!")
+    assert t.save, "Should save t as unique"
+
+    t.content = "Remaining unique"
+    assert t.save, "Should still save t as unique"
+
+    t2 = Topic.new("title" => "I'm unique!")
+    assert !t2.valid?, "Shouldn't be valid"
+    assert !t2.save, "Shouldn't save t2 as unique"
+    assert_equal "has already been taken", t2.errors.on(:title)
+    
+    t2.title = "Now Im really also unique"
+    assert t2.save, "Should now save t2 as unique"
+  end
 end
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