Ruby-on-rails Form_for with :multipart => true 吐出
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/10526641/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
Form_for with :multipart => true spits out
提问by Martin Lang
I am trying to add an Avatar Upload field to my Profile Page, but as soon as I add the :html => {:multipart => true}to it, it spits out an syntax error.
我正在尝试将 Avatar Upload 字段添加到我的个人资料页面，但是一旦我添加:html => {:multipart => true}到它，它就会吐出一个语法错误。
<%= 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 %>
The error is:
错误是：
syntax error, unexpected tASSOC, expecting keyword_end
...end= form_for(@user), :html => { :multipart => true } do |f...
... ^
回答by Alston
It should be like this:
应该是这样的：
form_for @user, :html => { :multipart => true } do |f|
The parenthesis in form_for(@user)is actually telling Ruby interpreter the function is invoked with only one parameter, and you can't pass wrong number of arguments in a method in Ruby.
中的括号form_for(@user)实际上是在告诉 Ruby 解释器该函数仅使用一个参数调用，并且您不能在 Ruby 中的方法中传递错误数量的参数。
回答by Benjamin Udink ten Cate
http://guides.rubyonrails.org/form_helpers.html#uploading-files
http://guides.rubyonrails.org/form_helpers.html#uploading-files
It's either a form_taghelper with multipart => trueor just form_for
它要么是一个form_tag帮手，multipart => true要么只是form_for
<%= form_tag({:action => :upload}, :multipart => true) do %>
<%= file_field_tag 'picture' %>
<% end %>
<%= form_for @person do |f| %>
<%= f.file_field :picture %>
<% end %>
回答by Adam
I'm assuming that you're either using 'paperclip' or ''carrierwave' to upload images. So, try this:
我假设您使用“回形针”或“carrierwave”上传图像。所以，试试这个：
<%= form_for @user, : url => users_path, :html => {:multipart => true} do |f| %>
