讨论区模型

app/api/mobile/entities/message.rb

@@ -0,0 +1,46 @@
+module Mobile
+  module Entities
+    class Message < Grape::Entity
+      include ApplicationHelper
+      include ApiHelper
+      def self.message_expose(f)
+        expose f do |u,opt|
+          if u.is_a?(Hash) && u.key?(f)
+            u[f]
+          elsif u.is_a?(::Message)
+            if u.respond_to?(f)
+              if f == :created_on
+                format_time( u.send(f))
+              else
+                u.send(f)
+              end
+            else
+              # case f
+              #   when :xx
+              #    #
+              # end
+            end
+          end
+
+        end
+      end
+
+      expose :user, using: Mobile::Entities::User do |c, opt|
+        if c.is_a?(::Message)
+          c.author
+        end
+      end
+      message_expose :board_id
+      message_expose :subject
+      message_expose :content
+      message_expose :replies_count
+      message_expose :created_on
+      message_expose :id
+      expose :message_children,using:Mobile::Entities::Message do |c,opt|
+        if c.is_a? (::Message)
+          c.children
+        end
+      end
+    end
+  end
+end