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我想從用戶拍攝的圖像的URL並提交在同一頁面 這裏顯示圖像的縮略圖是我如何把URL從用戶如何將用戶網址輸入顯示爲縮略圖?
<%= form_for([@project, @project.uploads.build]) do |f| %>
<div class="field">
<%= f.label :url %><br />
<%= f.text_field :url %>
</div>
<div class="actions">
<%= f.submit %>
</div>
<% end %>
然後我在顯示的URL相同的頁面
<p>
<%= upload.url %> |
<%= link_to 'Delete', [upload.project, upload],
:confirm => 'Are you sure?',
:method => :delete %>
</p>
但是相反,我想顯示縮略圖..我該怎麼做?