ruby-on-rails - 带:multipart => true的Form_for吐出

Question

我试图将“头像上传”字段添加到我的“个人资料”页面，但是一旦我将:html => {:multipart => true}添加到它，它就会吐出语法错误。

<%= form_for(@user), :html => { :multipart => true } do |f| %>
<%= render 'shared/error_messages', object: f.object %>

<%= f.label :name %>
<%= f.text_field :name %>

<%= f.label :email %>
<%= f.email_field :email %>

<%= f.label :password %>
<%= f.password_field :password %>

<%= f.label :password_confirmation, "Confirmation" %>
<%= f.password_field :password_confirmation %>


<%= f.label :avatar %>
    <%= f.file_field :avatar %>

    <%= f.submit "Save changes", class: "btn btn-large btn-primary" %>
<% end %>

错误是:

syntax error, unexpected tASSOC, expecting keyword_end
...end=  form_for(@user), :html => { :multipart => true } do |f...
...                               ^

Answer 1

http://guides.rubyonrails.org/form_helpers.html#uploading-files

它可以是带有form_tag的multipart => true助手，也可以只是form_for

<%= form_tag({:action => :upload}, :multipart => true) do %>
  <%= file_field_tag 'picture' %>
<% end %>

<%= form_for @person do |f| %>
  <%= f.file_field :picture %>
<% end %>