点赞功能

app/controllers/student_work_controller.rb

@@ -2,8 +2,8 @@ class StudentWorkController < ApplicationController
   layout "base_courses"
   include StudentWorkHelper
   before_filter :find_homework, :only => [:new, :index, :create]
-  before_filter :find_work, :only => [:edit, :update, :show, :destroy, :add_score]
-  before_filter :member_of_course, :only => [:index, :new, :create, :show, :add_score]
+  before_filter :find_work, :only => [:edit, :update, :show, :destroy, :add_score, :praise_student_work]
+  before_filter :member_of_course, :only => [:index, :new, :create, :show, :add_score, :praise_student_work]
   before_filter :author_of_work, :only => [:edit, :update, :destroy]
 
   def index
@@ -166,6 +166,22 @@ class StudentWorkController < ApplicationController
     end
   end
 
+  #为作品点赞
+  def praise_student_work
+    pt = PraiseTread.new
+    pt.user_id = User.current.id
+    pt.praise_tread_object_id = @work.id
+    pt.praise_tread_object_type = "StudentWork"
+    pt.praise_or_tread = 1
+    if pt.save
+      respond_to do |format|
+        format.js
+      end
+    else
+      render_404
+    end
+  end
+
   private
   #获取作业
   def find_homework

app/helpers/student_work_helper.rb

@@ -50,4 +50,14 @@ module StudentWorkHelper
     end
     result
   end
+
+  #获取赞的总数
+  def praise_homework_count obj_id
+    PraiseTread.where("praise_tread_object_id = #{obj_id} AND praise_tread_object_type = 'StudentWork'").count
+  end
+
+  #判断指定用户是不是已经赞过该作业
+  def is_praise_homework user_id, obj_id
+    PraiseTread.where("user_id = #{user_id} AND praise_tread_object_id = #{obj_id} AND praise_tread_object_type = 'StudentWork'").empty?
+  end
 end

app/views/student_work/_show.html.erb

@@ -15,8 +15,8 @@
       </li>
   <% end%>
   <% if (@homework.homework_type != 1 || @homework.homework_detail_manual.comment_status == 3) && @work.user != User.current%> <!-- 普通作业或者编程作业，或者是匿评结束阶段，显示点赞按钮 -->
-      <li class="fr" >
-        <a href="javascript:void(0);" class="orange_btn" style="font-size:12px;" >赞(10)</a>
+      <li class="fr" id="student_work_praise_<%= @homework.id%>">
+        <%= render :partial => 'student_work_praise' %>
       </li>
   <% end%>
   <div class="cl"></div>

app/views/student_work/_student_work_praise.html.erb

@@ -0,0 +1,5 @@
+<% if is_praise_homework User.current.id,@homework.id  %>
+    <%= link_to "赞(#{praise_homework_count @homework.id})",praise_student_work_student_work_path(@homework), :remote => true,:class => 'orange_btn', :style => 'font-size:12px;'%>
+<% else %>
+    <%= link_to "赞(#{praise_homework_count @homework.id})","javascript:void(0)",:class => 'grey_btn', :style => 'font-size:12px;'%>
+<% end %>

app/views/student_work/praise_student_work.js.erb

@@ -0,0 +1 @@
+$('#student_work_praise_<%= @homework.id%>').html('<%= escape_javascript(render :partial => 'student_work_praise')%>');

config/routes.rb

@@ -94,6 +94,7 @@ RedmineApp::Application.routes.draw do
   resources :student_work do
     member do
       post 'add_score'
+      get 'praise_student_work'
     end
     collection do
       post 'add_score_reply'