如何使用回形针在轨道中保存Blob对象。 编辑图像后，我得到Blob对象。如何将其保存在轨道Db中

Question

<%= f.hidden_field :document, :id=>"base64", :value=>"", :name=>"base64"  %> 
<%= f.submit "SAVE",  :class=>"c-btn-green-light", :type=>"submit", :id=>"save_canvas", :onclick=>"dataObject()" %>

Here, I am getting blob object after click save button

I want to send the blob object in a hidden field

Answer 1

You need to have column type as binary and you can directly assign blob object to that column. eg

obj.data = params[:document].read

Here is rails documentation for creating column with binary type. http://api.rubyonrails.org/classes/ActiveRecord/ConnectionAdapters/SchemaStatements.html#method-i-add_column