增加学校logo的上传功能，以及实时预览效果

app/controllers/admin_controller.rb

@@ -340,9 +340,9 @@ class AdminController < ApplicationController
 
   #学校列表
   def schools
-    @q = params[:school_name]
-    if @q
-      @schools = School.where("name like '%#{@q}%'")
+    @school_name = params[:school_name]
+    if @school_name
+      @schools = School.where("name like '%#{@school_name}%'")
     else
       @schools = School.all
     end

app/controllers/school_controller.rb

@@ -4,28 +4,21 @@ class SchoolController < ApplicationController
   
   def upload
     uploaded_io = params[:logo]
-    school_id = 0
-    schools = School.where("name = ?", params[:school])
-    
-    schools.each do |s|
-      school_id = s.id
-    end
-    
+    school_id ||= params[:id]
     unless uploaded_io.nil? 
       File.open(Rails.root.join('public', 'images', 'school', school_id.to_s+'.png'), 'wb') do |file|
         file.write(uploaded_io.read)
       end
-      
       s1 = School.find(school_id)
       s1.logo_link  = '/images/school/'+school_id.to_s+'.png'
       s1.save
-      
-      
-    end    
+    end
+    redirect_to admin_schools_url(:school_name => params[:school_name])
   end  
 
   def upload_logo
-
+    @school = School.find params[:id]
+    @school_name = params[:school_name]
   end
 
   #获取制定学校开设的课程数

app/views/admin/schools.html.erb

@@ -3,7 +3,7 @@
 </h3>
 <%= form_tag({:controller => 'admin', :action => 'schools' }, :method => :get,:id=>"search_course_form") do %>
     <%= submit_tag "搜索",:style => "float: right;margin-right: 15px;"%>
-    <input style="float: right;margin-right: 10px;" id="v_subject" placeholder="学校名称" type="text" name="school_name" value="<%= @q%>">
+    <input style="float: right;margin-right: 10px;" id="v_subject" placeholder="学校名称" type="text" name="school_name" value="<%= @school_name%>">
 <% end %>
 <div class="cl"></div>
 
@@ -38,7 +38,7 @@
             </span>
           </td>
           <td class="buttons" style="vertical-align: middle;">
-            <%= link_to("上传logo", edit_organization_path(school.id), :class => 'icon icon-copy') %>
+            <%= link_to("修改",  upload_logo_school_path(school.id,:school_name => @school_name), :class => 'icon icon-copy') %>
             <%#= link_to(l(:button_delete),  organization_path(school.id), :method => :delete,:confirm => l(:text_are_you_sure), :class => 'icon icon-del') %>
           </td>
         </tr>

app/views/school/upload_logo.html.erb

@@ -1,5 +1,28 @@
-<%= form_tag({action: :upload},method: "post",  multipart: true) do %>
-	<%= text_field_tag 'school'%>
-	<%= file_field_tag 'logo' %>
-	<%= submit_tag('Upload') %>
+<script>
+function showPreview(source) {
+    var file = source.files[0];
+    if(window.FileReader) {
+        var fr = new FileReader();
+        fr.onloadend = function(e) {
+            document.getElementById("avatar_image").src = e.target.result;
+        };
+        fr.readAsDataURL(file);
+    }
+}
+</script>
+
+<%= form_tag(upload_school_path(@school.id),method: "post",  multipart: true) do %>
+	<%#= text_field_tag 'school'%>
+    <div style="margin: 20px;">
+      <input type="hidden" value="<%= @school_name%>" name="school_name">
+      <%= image_tag(@school.logo_link, id: "avatar_image", :class=>"school_avatar")%>
+      <a type="button" onclick="$('#file').click();" style="margin: 90px 0 0 10px;float: left;padding: 2px 5px;border: 1px solid #eaeaea;cursor: pointer;text-decoration: none;width: 55px;">上传图片</a>
+      <%= file_field_tag 'logo',:style => "display:none;", :id => "file", :onchange => "showPreview(this)"%>
+      <div style="clear: both;"></div>
+      <div style="margin-top: 10px;">
+        <%= submit_tag('上传') %>
+        <%= submit_tag('取消') %>
+      </div>
+    </div>
 <% end %>
+

config/routes.rb

@@ -39,6 +39,17 @@ RedmineApp::Application.routes.draw do
 
   end
 
+  resources :school do
+    collection do
+
+    end
+
+    member do
+      get 'upload_logo'
+      post 'upload'
+    end
+  end
+
   resources :homework_attach do
     collection do
       get 'get_homework_member_list'
@@ -809,9 +820,6 @@ RedmineApp::Application.routes.draw do
   post 'school/search_school/', :to => 'school#search_school'
   get 'school/search_school/', :to => 'school#search_school'
 
-  post 'school/upload', :to => 'school#upload'
-  get 'school/upload_logo', :to => 'school#upload_logo'
-
   ######added by nie
   match 'tags/show_projects_tags'
   ########### added by liuping

public/stylesheets/application.css

@@ -2796,4 +2796,15 @@ div.repos_explain{
 .upload_img img{max-width: 100%;}
 #activity .upload_img img{max-width: 580px;}
 
-img,embed{max-width: 100%;}
+img,embed{max-width: 100%;}
+
+img.school_avatar {
+    background: rgb(245, 245, 245);
+    padding: 4px;
+    border: 1px solid #e5dfc7;
+    float: left;
+    display: block;
+    width: 100px;
+    height: 100px;
+    max-width: none;
+}