使用回形针更新Ruby on Rails上的头像

Question

I've looked around and I cannot figure out why this is working. I allow users to sign up, without needing them to upload avatars at first. However, if they wish, they can upload avatars after signing up. I allow them to edit their avatar in a "profiles" controller, not in the user controller. However, the avatar won't update. I'm using devise for the users. Code below

<%= form_for edit_user_path(current_user.id), :html => { :multipart => true } do |form| %>
  <%= form.file_field :avatar %>
  <%= form.submit "upload" %>
<% end %>

And in the Users controller, I have this:

def edit
  @user = User.find(params[:id])
  @user.update_attribute(:avatar, params[:user][:avatar])
end

And in the user model, I have this

has_attached_file :avatar, :styles => { :show => "150x150#" }, :default_url => 'missing_:style.png'

The avatar does not update or save. I'm not sure why.

Update with new form code:

<%= form_for current_user, :url => {:action => 'update'}, :html => { :multipart => true } do |form| %>
  <%= form.file_field :avatar %>
  <%= form.submit "upload" %>
<% end %>

In the profiles controller, I have this:

def update
  @user = User.find(params[:id])
  @user.update_attribute(:avatar, params[:user][:avatar])
end

I get this error: undefined method `name' for #

Parameters being passed on the request are below

{"utf8"=>"✓",
 "_method"=>"put",
 "authenticity_token"=>"cxANtlyj+W+ykSnivfQTfTznkpt7yXe75E8jWI1IC+o=",
 "user"=>{"avatar"=>#<ActionDispatch::Http::UploadedFile:0x000001032ac7c8         @original_filename="pictester.png",
 @content_type="image/png",
 @headers="Content-Disposition: form-data; name=\"user[avatar]\";     filename=\"pictester.png\"\r\nContent-Type: image/png\r\n",
 @tempfile=#<File:/var/folders/x9/gvnnn6s9585gkxw40c51d3540000gn/T/RackMultipart20130622-    10366-a8ome3>>},
 "commit"=>"upload",
 "id"=>"1"}

Answer 1

Updating attributes is done inside def update , not def edit . This is for rendering the form.

In profiles_controller.rb

def update
    @user = User.find(params[:id])
    @user.update_attribute(:avatar, params[:user][:avatar])
end

should work.