Add generate methods for value column and template column

lib/shotengai/json_column.rb

@@ -5,23 +5,24 @@ module Shotengai
     end
 
     class_methods do
-      def custom_hash_columns *columns
+      def custom_hash_columns columns, options={}
+        decode_or_not = options[:decode]
         columns.each do |column|
           # QUESTION: 这样可以避免 send("#{column}="), 合适？
           class_eval %Q{
             define_method('#{column}') do 
               super() || {}
             end
-
+            if #{decode_or_not}
               define_method("#{column}_input=") do |val|
                 parsed_val = val && val.map{ |h| { (h[:key] || h['key']) => (h[:val] || h['val']) } }.reduce(&:merge)
                 self.#{column} = parsed_val
-              self.#{column}_will_change!
               end
 
               define_method("#{column}_output") do
                 self.#{column}.map {|key, val| { key: key, val: val } }
               end
+            end
           }
         end
       end
@@ -30,6 +31,36 @@ module Shotengai
         # like meta, detail these json using for code development  
       end
 
+      def generate_hash_template_column_for names
+        names.each do |name|
+          class_eval %Q{
+            def #{name}_value
+              Shotengai::Harray.new(super())
+            end
+
+            def #{name}_value= val
+              raise Shotengai::WebError.new('#{name}_val 必须是个 Array'), -1 , 401) unless val.nil? || Array === val
+              super(val)
+            end
+          }
+        end
+      end
+
+      def generate_hash_value_column_for names, options={}
+        names.each do |name|
+          class_eval %Q{
+            delegate :#{name}_template, to: :#{options[:delegate_template_to]} if self.respond_to?(#{options[:delegate_template_to]})
+            def #{name}
+              {
+                template: self.#{name}_template,
+                value: self.#{name}_value,
+
+              }
+            end
+          }
+        end
+      end
+
       def column_has_children column, options
         ArgumentError.new("Please give #{column} one child at least.") unless options[:children]
         children_names = options[:children].map(&:to_s)