修复上传benner图片显示问题

app/views/admins/weapp_banners/create.js.erb

@@ -1 +1,2 @@
-$("#course_img")[0].innerHTML = "<%= escape_javascript(image_tag Util::FileManage.source_disk_file_url(@course), class: 'banner-item-img course-banner-img') %>"
+$("#course_img")[0].innerHTML = "<%= escape_javascript(image_tag Util::FileManage.source_disk_file_url(@course), class: 'banner-item-img course-banner-img') %>";
+$("#course_img_banner").addClass('has-img');

app/views/admins/weapp_banners/index.html.erb

@@ -9,7 +9,7 @@
         <%= form_with(url: '/admins/weapp_banners',  html: { id: 'course_form', enctype: 'multipart/form-data' }) do |f| %>
         <div class="col-12 col-md-4 banner-item">
           <div class="banner-item-top">实践课程</div>
-          <div class="course banner-item-bottom <%= @course ? 'has-img' : '' %>">
+          <div class="course banner-item-bottom <%= @course ? 'has-img' : '' %>" id="course_img_banner">
             <div id="course_img">
               <% if @course %>
                 <img class="banner-item-img course-banner-img" src="<%= Util::FileManage.exists?(@course) ? Util::FileManage.source_disk_file_url(@course) : '' %>"/>
@@ -21,11 +21,10 @@
         </div>
        <% end %>
 
-
       <%= form_with(url: '/admins/weapp_banners/shixun_banner',  html: { id: 'shixun_form', enctype: 'multipart/form-data' }) do |f| %>
         <div class="col-12 col-md-4 banner-item">
           <div class="banner-item-top">实训项目</div>
-          <div class="shixun banner-item-bottom <%= @shixun ? 'has-img' : '' %>">
+          <div class="shixun banner-item-bottom <%= @shixun ? 'has-img' : '' %>" id="shixun_img_banner">
            <div id="shixun_img">
              <% if @shixun %>
                <img class="banner-item-img shixun-banner-img" src="<%= Util::FileManage.exists?(@shixun) ? Util::FileManage.source_disk_file_url(@shixun) : '' %>"/>

app/views/admins/weapp_banners/shixun_banner.js.erb

@@ -1 +1,2 @@
-$("#shixun_img")[0].innerHTML = "<%= escape_javascript(image_tag Util::FileManage.source_disk_file_url(@shixun), class: 'banner-item-img course-banner-img') %>"
+$("#shixun_img")[0].innerHTML = "<%= escape_javascript(image_tag Util::FileManage.source_disk_file_url(@shixun), class: 'banner-item-img course-banner-img') %>";
+$("#shixun_img_banner").addClass('has-img');