[postgres] improve Range's type cast - thus fixing minor quoting failure on AR 4.x

Author: kares

lib/arjdbc/postgresql/adapter.rb

@@ -850,10 +850,11 @@ def quote(value, column = nil)
         else super
         end
       when Range
-        if column.type.to_s[-5..-1] == 'range' # :'xxxrange' only in AR-4.0
+        sql_type = column.respond_to?(:sql_type) && column.sql_type
+        if sql_type && sql_type[-5, 5] == 'range' && AR4_COMPAT
           column_class = ::ActiveRecord::ConnectionAdapters::PostgreSQLColumn
           escaped = quote_string(column_class.range_to_string(value))
-          "'#{escaped}'::#{column.sql_type}"
+          "'#{escaped}'::#{sql_type}"
         else super
         end
       when IPAddr

test/db/postgresql/quoting_test.rb

@@ -62,8 +62,10 @@ def test_quote_time_usec
 
   def test_quote_range
     range = "1,2]'; SELECT * FROM users; --".."a"
-    c = Column.new(nil, nil, OID::Range.new(:integer), 'int8range')
-    assert_equal "[1,2]''; SELECT * FROM users; --,a]::int8range", connection.quote(range, c)
+    c = Column.new(nil, nil, 'int8range')
+    assert_equal "'[1,2]''; SELECT * FROM users; --,a]'::int8range", connection.quote(range, c)
+    #c = PostgreSQLColumn.new(nil, nil, OID::Range.new(:integer), 'int8range')
+    #assert_equal "'[1,2]''; SELECT * FROM users; --,a]'::int8range", @conn.quote(range, c)
   end if OID
 
 end