Update ohm obj after a mysql obj been saved

db/migrate/1_create_forecasts.rb

 class CreateForecasts < ActiveRecord::Migration[5.0]
-  def change
+  def up
     create_table :forecasts do |t|
       t.datetime :datetime
-      t.string :speed
       t.integer :temp_low
       t.integer :temp_high
-      t.string :weathertext
-      t.string :weatherpic
+      t.string :weather_text
+      t.string :weather_pic
       t.string :cityname
-      t.string :serialnumber
       t.string :win_dir
       t.string :win_speed
 
@@ -19,4 +17,8 @@ class CreateForecasts < ActiveRecord::Migration[5.0]
     add_index :forecasts, :cityname
     add_index :forecasts, :datetime
   end
+
+  def down
+    drop_table :forecasts
+  end
 end

lib/weather-model/redic.rb

+class Redic
+  def expire(key, ttl)
+    self.call("EXPIRE", key, ttl)
+  end
+
+  def ttl(key)
+    self.call("TTL", key)
+  end
+end
\ No newline at end of file

lib/weather-model/source_schema.rb

@@ -20,8 +20,21 @@ module WeatherModel
       },
       options: {
         index: [:cityname],
+        expire: 5,
+        unique: :mysql_id,
         father: nil,
-        son: nil
+        son: nil,
+        
+      },
+      factory: {
+        datetime: '2017-05-16',
+        cityname: 'shanghai',
+        temp_high: '100',
+        temp_low: '0',
+        weather_text: '酷热严寒',
+        weather_pic: 'http://xxx.com',
+        win_dir: '东南西北风',
+        win_speed: '1级',
       }
     }
   end    

lib/weather-model/storer.rb

@@ -12,33 +12,41 @@ module WeatherModel
       end
 
       class Ohm < ::Ohm::Model
-        def self.use_settings settings
         include ::Ohm::Expire
-          # TTL = 5
-          # attribute :mysqlid
-          settings.keys.each { |x|
-            attribute x
+        def self.use_settings settings
+
+          attribute :mysql_id
+          attribute :updated_at
+          index :mysql_id
+          settings[:schema].keys.each { |attr|
+            attribute attr
           }
-          [:index, :unique, :expire].each do |x|
-            method(x).call settings[x]
+          [:index, :unique, :expire, :son, :dad].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
-          # expire TTL
         end
 
       private
-        def son his_son # input like :Post
+        def self.son his_son # input like :Post
           # collection :posts, :Post
-          collection(his_son.to_s.underscore.pluralize.to_sym, his_son) if SourceSchema.const_defined?(his_son)
+          collection(his_son.to_s.underscore.pluralize.to_sym, his_son) if his_son && SourceSchema.const_defined?(his_son)
         end
 
-        def dad his_dad # input like :Post
+        def self.dad 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_son)
+          reference(his_dad.to_s.underscore.to_sym, his_dad ) if his_dad && SourceSchema.const_defined?(his_dad)
         end
       end
+
     private
       def update_ohm
-        # Ohm.create()
+        ohm_attrs = self.attributes.except('created_at', 'id').merge(mysql_id: id)
+        # find 找不到 会自动生成
+        ohm_obj = Ohm.find(mysql_id: id).first.update(ohm_attrs)
+        # rescue  Ohm::UniqueIndexViolation mysql_id should be unique
       end   
     end
 

spec/weather-model_spec.rb

@@ -4,7 +4,7 @@ require "ohm"
 
 RSpec.describe WeatherModel do
   include WeatherModel
-
+  before do
     # start an ohm
     Ohm.redis = Redic.new("redis://127.0.0.1:6379")
     # run migration
@@ -14,7 +14,8 @@ RSpec.describe WeatherModel do
       :database => 'weather-model-test.sqlite3'
     )
     ActiveRecord::Migration[5.0].subclasses.each do |migrate|
-    migrate.migrate rescue nil
+      migrate.migrate(:up) 
+    end
   end
 
   it "has a version number" do
@@ -22,7 +23,29 @@ RSpec.describe WeatherModel do
   end
 
   it 'Forecast' do
-p Forecast::ShanghaiTen.all
+    Forecast::ShanghaiTen.create({
+          datetime: '2017-05-16',
+          cityname: 'shanghai',
+          temp_high: '100',
+          temp_low: '0',
+          weather_text: '酷热严寒',
+          weather_pic: 'http://xxx.com',
+          win_dir: '东南西北风',
+          win_speed: '1级',
+        })
+    expect(Forecast::ShanghaiTen.count).to eq(1)
+    expect(Forecast::ShanghaiTen::Ohm.all.count).to eq(1)
+  #  p 'p Forecast::ShanghaiTen::Ohm.all.first.attributes'
+  # ttl 失败
+      p Forecast::ShanghaiTen::Ohm.all.to_a
+      p Forecast::ShanghaiTen::Ohm.all.to_a.map(&:get_ttl)
 
   end
+
+  after do
+    ActiveRecord::Migration[5.0].subclasses.each do |migrate|
+      migrate.migrate(:down) 
+    end 
+  end
+
 end