Only use BINARY for mysql case sensitive uniqueness check when column has a case insensitive collation.

2 files changed, 44 insertions, 4 deletions

diff --git a/activerecord/test/cases/adapters/mysql/case_sensitivity_test.rb b/activerecord/test/cases/adapters/mysql/case_sensitivity_test.rb
index 97adb6b297..340fc95503 100644
--- a/activerecord/test/cases/adapters/mysql/case_sensitivity_test.rb
+++ b/activerecord/test/cases/adapters/mysql/case_sensitivity_test.rb
@@ -3,10 +3,10 @@ require 'models/person'
 
 class MysqlCaseSensitivityTest < ActiveRecord::TestCase
   class CollationTest < ActiveRecord::Base
-    validates_uniqueness_of :string_cs_column, :case_sensitive => false
-    validates_uniqueness_of :string_ci_column, :case_sensitive => false
   end
 
+  repair_validations(CollationTest)
+
   def test_columns_include_collation_different_from_table
     assert_equal 'utf8_bin', CollationTest.columns_hash['string_cs_column'].collation
     assert_equal 'utf8_general_ci', CollationTest.columns_hash['string_ci_column'].collation
@@ -18,6 +18,7 @@ class MysqlCaseSensitivityTest < ActiveRecord::TestCase
   end
 
   def test_case_insensitive_comparison_for_ci_column
+    CollationTest.validates_uniqueness_of(:string_ci_column, :case_sensitive => false)
     CollationTest.create!(:string_ci_column => 'A')
     invalid = CollationTest.new(:string_ci_column => 'a')
     queries = assert_sql { invalid.save }
@@ -26,10 +27,29 @@ class MysqlCaseSensitivityTest < ActiveRecord::TestCase
   end
 
   def test_case_insensitive_comparison_for_cs_column
+    CollationTest.validates_uniqueness_of(:string_cs_column, :case_sensitive => false)
     CollationTest.create!(:string_cs_column => 'A')
     invalid = CollationTest.new(:string_cs_column => 'a')
     queries = assert_sql { invalid.save }
     cs_uniqueness_query = queries.detect { |q| q.match(/string_cs_column/) }
     assert_match(/lower/i, cs_uniqueness_query)
   end
+
+  def test_case_sensitive_comparison_for_ci_column
+    CollationTest.validates_uniqueness_of(:string_ci_column, :case_sensitive => true)
+    CollationTest.create!(:string_ci_column => 'A')
+    invalid = CollationTest.new(:string_ci_column => 'A')
+    queries = assert_sql { invalid.save }
+    ci_uniqueness_query = queries.detect { |q| q.match(/string_ci_column/) }
+    assert_match(/binary/i, ci_uniqueness_query)
+  end
+
+  def test_case_sensitive_comparison_for_cs_column
+    CollationTest.validates_uniqueness_of(:string_cs_column, :case_sensitive => true)
+    CollationTest.create!(:string_cs_column => 'A')
+    invalid = CollationTest.new(:string_cs_column => 'A')
+    queries = assert_sql { invalid.save }
+    cs_uniqueness_query = queries.detect { |q| q.match(/string_cs_column/) }
+    assert_no_match(/binary/i, cs_uniqueness_query)
+  end
 end
diff --git a/activerecord/test/cases/adapters/mysql2/case_sensitivity_test.rb b/activerecord/test/cases/adapters/mysql2/case_sensitivity_test.rb
index 6bcc113482..09bebf3071 100644
--- a/activerecord/test/cases/adapters/mysql2/case_sensitivity_test.rb
+++ b/activerecord/test/cases/adapters/mysql2/case_sensitivity_test.rb
@@ -3,10 +3,10 @@ require 'models/person'
 
 class Mysql2CaseSensitivityTest < ActiveRecord::TestCase
   class CollationTest < ActiveRecord::Base
-    validates_uniqueness_of :string_cs_column, :case_sensitive => false
-    validates_uniqueness_of :string_ci_column, :case_sensitive => false
   end
 
+  repair_validations(CollationTest)
+
   def test_columns_include_collation_different_from_table
     assert_equal 'utf8_bin', CollationTest.columns_hash['string_cs_column'].collation
     assert_equal 'utf8_general_ci', CollationTest.columns_hash['string_ci_column'].collation
@@ -18,6 +18,7 @@ class Mysql2CaseSensitivityTest < ActiveRecord::TestCase
   end
 
   def test_case_insensitive_comparison_for_ci_column
+    CollationTest.validates_uniqueness_of(:string_ci_column, :case_sensitive => false)
     CollationTest.create!(:string_ci_column => 'A')
     invalid = CollationTest.new(:string_ci_column => 'a')
     queries = assert_sql { invalid.save }
@@ -26,10 +27,29 @@ class Mysql2CaseSensitivityTest < ActiveRecord::TestCase
   end
 
   def test_case_insensitive_comparison_for_cs_column
+    CollationTest.validates_uniqueness_of(:string_cs_column, :case_sensitive => false)
     CollationTest.create!(:string_cs_column => 'A')
     invalid = CollationTest.new(:string_cs_column => 'a')
     queries = assert_sql { invalid.save }
     cs_uniqueness_query = queries.detect { |q| q.match(/string_cs_column/)}
     assert_match(/lower/i, cs_uniqueness_query)
   end
+
+  def test_case_sensitive_comparison_for_ci_column
+    CollationTest.validates_uniqueness_of(:string_ci_column, :case_sensitive => true)
+    CollationTest.create!(:string_ci_column => 'A')
+    invalid = CollationTest.new(:string_ci_column => 'A')
+    queries = assert_sql { invalid.save }
+    ci_uniqueness_query = queries.detect { |q| q.match(/string_ci_column/) }
+    assert_match(/binary/i, ci_uniqueness_query)
+  end
+
+  def test_case_sensitive_comparison_for_cs_column
+    CollationTest.validates_uniqueness_of(:string_cs_column, :case_sensitive => true)
+    CollationTest.create!(:string_cs_column => 'A')
+    invalid = CollationTest.new(:string_cs_column => 'A')
+    queries = assert_sql { invalid.save }
+    cs_uniqueness_query = queries.detect { |q| q.match(/string_cs_column/) }
+    assert_no_match(/binary/i, cs_uniqueness_query)
+  end
 end