Merge pull request #878 from yahonda/rails5_serialize_clob

Serialize value for lob columns

Author: yahonda

lib/active_record/connection_adapters/oracle_enhanced_adapter.rb

@@ -689,6 +689,9 @@ def write_lobs(table_name, klass, attributes, columns) #:nodoc:
           value = attributes[col.name]
           # changed sequence of next two lines - should check if value is nil before converting to yaml
           next if value.nil?  || (value == '')
+          if klass.attribute_types[col.name].is_a? ActiveRecord::Type::Serialized
+            value = klass.attribute_types[col.name].serialize(value)
+          end
           uncached do
             sql = is_with_cpk ? "SELECT #{quote_column_name(col.name)} FROM #{quote_table_name(table_name)} WHERE #{klass.composite_where_clause(id)} FOR UPDATE" :
               "SELECT #{quote_column_name(col.name)} FROM #{quote_table_name(table_name)} WHERE #{quote_column_name(klass.primary_key)} = #{id} FOR UPDATE"