about content_type

rubyonrails-talk
1

Hello: I defined a mehod in a model like this: def file=(file_field)#virtual attri is not same as access method    unless file_field=="" #manage not upload image      if file_field.content_type=~/^image/ && ensure_uniq_img("/images/users/"+file_field.original_filename)        #the not image file will not be upload       File.open("#{RAILS_ROOT}/public/images/users/#{file_field.original_filename}","wb") { |i| i.write(file_field.read)}      end      #show the error message      self.photo="/images/users/"+file_field.original_filename    end   end

2

anyone can help me?

3

Is the form set to multipart ?

Fred

4

Frederick Cheung wrote:

5

who can help me?

6

My form codes are following:

<%form_tag :action=>"register",:method=>:post,:multipart=>true do-%> <%=render(:partial=>"changing_user",:object=>@user)-%> <%end-%>.

who can help me?

7

My form codes are following:

<%form_tag :action=>"register",:method=>:post,:multipart=>true do-%> <%=render(:partial=>"changing_user",:object=>@user)-%> <%end-%>.

who can help me?

That doesn't actually create a multipart form (check the html
generated). When using form_tag like this, the first argument is the options used
to build the url to post to. The second parameter are the options for
the form itself, and this is where the multipart option does. So you need something more like

<%form_tag( {:action=>"register"},:method=>:post,:multipart=>true) do-%>

8

<%form_tag( {:action=>"register"},:method=>:post,:multipart=>true) do-%>

Thank you.It is the brace that made the error.