Add JsonColumns & Add reference functions to Mysql

lib/weather-model/json_columns.rb

+module JsonColumns
+  def json_columns *columns
+    columns.each do |column|
+      define_method(column) {
+        value = self.read_attribute(column)
+        value && JSON.parse(value.gsub('=>', ':'))
+      }
+      define_method("#{column}=") { |value|
+        self.[]=( column, JSON.dump(value) )
+      }
+    end
+  end
+end
\ No newline at end of file

lib/weather-model/source_schemas/forecast.rb

@@ -18,8 +18,8 @@ module WeatherModel
           index: [:cityname, :date],
           expire: 11 * 24 * 60 * 60,
           unique: nil,
-          father: nil,
-          son: nil,
+          belongs_to: nil,
+          has_many: nil,
           
         },
         factory_name: :city_forecast,

lib/weather-model/storer.rb

@@ -3,15 +3,27 @@ module WeatherModel
     require 'active_record'
     require 'ohm'
     require "ohm/expire"
+    require 'weather-model/json_columns'
 
     class Mysql < ::ActiveRecord::Base
+      extend JsonColumns
       after_save :update_ohm
       def self.use_settings settings
         self.table_name = settings[:table_name]
+        set_options settings
         define_ohm settings
         define_factory settings
       end
 
+      def self.set_options settings
+        [:has_many, :belongs_to, :json_column].each do |option|
+          attrs = settings[:options][option]
+          attrs.is_a?(Array) ?
+            attrs.each{ |attr| method(option).call(attr) if attr } :
+            method(option).call(attrs) if attrs
+        end
+      end
+
 
       def self.define_ohm settings
         const_set('Ohm', Class.new(SourceOhm)).use_settings(settings)
@@ -31,7 +43,9 @@ module WeatherModel
       end
 
       class SourceOhm < ::Ohm::Model
+        extend JsonColumns
         include ::Ohm::Expire
+        
         def self.use_settings settings
 
           attribute :mysql_id
@@ -42,13 +56,17 @@ module WeatherModel
           settings[:schema].keys.each { |attr|
             attribute attr
           }
-            [:index, :unique, :expire, :son, :dad].each do |option|
+        end
+
+        def self.set_options settings
+          [:index, :unique, :expire, :has_many, :belongs_to, :json_column].each do |option|
             attrs = settings[:options][option]
             attrs.is_a?(Array) ?
               attrs.each{ |attr| method(option).call(attr) if attr } :
               method(option).call(attrs) if attrs
           end
         end
+
         # ohm-expire 只处理了create
         # 而且 只把 attributes 的值给 TTL了。。。
         def update attributes
@@ -63,12 +81,12 @@ module WeatherModel
           
 
         private
-          def self.son his_son # input like :Post
+          def self.has_many his_son # input like :Post
             # collection :posts, :Post
             collection(his_son.to_s.underscore.pluralize.to_sym, his_son) if his_son && SourceSchema.const_defined?(his_son)
           end
 
-          def self.dad his_dad # input like :Post
+          def self.belongs_to his_dad # input like :Post
             # reference :post, :Post
             reference(his_dad.to_s.underscore.to_sym, his_dad ) if his_dad && SourceSchema.const_defined?(his_dad)
           end
@@ -82,6 +100,14 @@ module WeatherModel
         ohm_obj = get_ohm.find(mysql_id: id).first.try(:update, ohm_attrs) || get_ohm.create(ohm_attrs)
         # rescue  Ohm::UniqueIndexViolation mysql_id should be unique
       end
+      # Forecast -> :forecasts
+      def has_many name
+        super name.to_s.underscore.pluralize.to_sym
+      end
+      # Forecast -> :forecast
+      def belongs_to name
+        super name.to_s.underscore.to_sym
+      end
     end