Rails 4创建表单仅更新一个属性

Question

I have a user model, but I need to create a form to update only one attribute.

EDIT: I added the create_mailbox patch in :users resource but the form throws a undefined method settings_create_mailbox_path'` error. Can anyone give me some insight to how this member patch/resource routes work?

Here's the form:

<%= form_for @user, url: settings_create_mailbox_path(@user) do |f| %>
  <%= f.text_field :rss_mailbox, autocomplete: 'off'%>
  <button type="submit" class="button">Create Mailbox</button>
<% end %>

Here's the Users route:

resources :users, id: /.*/ do
    member do
      patch :settings_update, controller: :settings
      patch :create_mailbox, controller: :settings
      patch :view_settings_update, controller: :settings
      patch :sharing_services_update, controller: :sharing_services
      patch :actions_update, controller: :actions
    end
  end

And here's the settings route:

get :settings, to: 'settings#settings'
  namespace :settings do
    get :account
    get :billing
    get :import_export
    get :feeds
    get :help
    post :update_credit_card
    post :mark_favicon_complete
    post :update_plan
    post :font
    post :font_increase
    post :font_decrease
    post :entry_width
  end

Answer 1

It would depend on the attribute and what you're changing it to.

If it's a simple toggling of a boolean field, for example, you could get away with a link that fires off an ajax request, that makes the change and returns some HTML (eg. to update the link you clicked).

If it's something else, eg. a text field or a string or something, a form_for @user would be the typical way. But the form would only have one field, and the controller that processes the form post would have its strong parameters (or attr_accessible for Rails 3) set so that it will only accept data for that one field.

Answer 2

Was using the wrong route name. This was the right one:

create_mailbox_user_path

Answer 3

Rails 4 Use Strong Parameters to determine which attribute is allow to update like so:

def user_param
  params.require(:user).permit(:attr)
end