2

本当にこれに頭を悩ませています。私はRailsに比較的慣れていないので、それほど難しくないと確信していることをしようとしています。

「活動」が多い「日」が多いモデル「トリップ」があります

私は「Trip」のshow.html.erbビューにいます。このビューでは、「Day」に関連付けられる新しい「Activity」を作成したり、既存の「Activity」を編集したりできるフォームのパーシャルをレンダリングしています。すでに「日」に属する「活動」

フォームpartialでform_forに渡すにはどうすればよいですか？そのローカル変数の「Day」に新しい「Activity」を作成します。同じフォームの部分を使用して、「アクティビティ」が関連付けられている「日」を取得するにはどうすればよいですか？最終的に、これらはAJAXでロードされたオブジェクトになります。私は過去数時間グーグルで検索しましたが、これに似た例は見つかりませんでした。私は本当に助けに感謝します。

ルート.rb

  resources :trips do
    resources :days    
  end

  resources :days do
    resources :activities
  end

旅行のためのshow.html.erb

<div id="activities_list">
  <%= render :partial => "activities" %>
</div> 

<div id="activity_form">
  <%= render :partial => "/activities/form", :locals => { :activity => @activity}  %>
</div>

<div id="bottom">
<%= link_to 'Edit', edit_trip_path(@trip) %> |
<%= link_to 'Back', trips_path %>
</div>

_activities.html.erb部分的

<h1><%= @trip.title %></h1>

<% @trip.days.each do |day| %>
<div id="blech_<%= day.id %>">
  <b><%= day.summary %></b>
      <% day.activities.each do |activity| %>
            <li id="activity_<%= activity.id %>"><%= link_to activity.address, edit_day_activity_path(day, activity), :remote => true  %></li>
      <% end %>
    <% end %>
  <%= link_to 'New Activity', new_day_activity_path(day), :remote => true %>
</div>
<% end %>

_form.html.erbpartial私は（@ day、@ activity）変数を使用してday_activity_pathを呼び出す必要があることを知っています。しかし、ここで@day変数を取得する方法がわかりません

  <%= form_for([@activity], :remote => true) do |f| %>
     <fieldset>
       <%= f.label :title, "Activity" %><br />
       <%= f.text_field :title, :rows => 1 %><br />
     </fieldset>

    <div class="actions">
      <%= f.submit %>
    </div>
  <% end %>
4

3 に答える 3

0

ok lets say you want to add a new activity to a day.

do not forget that we are using REST here so (http://old.thoughtsincomputation.com/posts/understanding-rest-in-rails-3)

our day must have many activities and our activity belongs_to a day

class Day < ActiveRecord::Base
  has_many :activities
end

class Activity < ActiveRecord::Base
  belongs_to :day
end

our routes should me something like

resources :days do
  resources :activities
end

with that routes the generated paths we have is something like 

days_path
day_path
new_day_path

new_day_activity_path
delete_day_activity_path
edit_day_activity_path

in our day view we are in a url like localhost:3000/days/1 (DaysController, action show)

in wich case we can add a @activity = Activity.new and in a partial add the form below

<%= form_for [@day, @activity] do |form_field| %>
  rest_code_goes_here
<% end %>

this form will submit in ActivityController, action :create with the day and the controller will check for validation and save it .

take a look at the link is a small app i have used something like that https://github.com/leftis/tefteraki/blob/master/app/views/debts/_new_dose.haml

于 2012-11-06T14:29:36.573 に答える
0

Oh that actualy means that trip have many days and the resouces have more nesting something like 

resources :trips
  resources :days
    resources :activities
  end
end

so when you are in local/trips/1/ you actually are in TripController, show action you cannot do it without creating a day texhnicaly you can have a form for the day in which you can use nested form for activities.

the easy way is the gem of ryan bates https://github.com/ryanb/nested_form but to do that you must first change your relations from habtm to

class Day
  has_many :activities
end

class Activity
  belongs_to :day
end

then you will add a day form inside you trip show view

<% nested_form_for [:trip, Day.new], :remote => true do |form| %>

  <%= form.text_field :date %>

  <%= form.fields_for :activities do |activity_form| %>
    <%= activity_form.text_field :name %>
    <%= activity_form.link_to_remove "Remove this activity" %>
  <% end %>
  <p><%= form.link_to_add "Add an activity", :tasks %></p>

<% end %>

the form now makes a request to DaysController.create with params for the trip and the activities and asking to be served ajaxly

check at gem and my app i am using all of this i hope it helps!!!

于 2012-11-07T14:41:31.953 に答える
0

This is what I ended up doing and it works.

In my show.html.erb for my "Trip".

show.html.erb

<div id="activity_form">
<h2>Activities</h2>
</div>

link to "Edit' an Activity. Notice the :remote => true which tells the Rails controller that this will be an AJAX request so to render edit.js.erb

<%= link_to activity.location[0, 20], edit_day_activity_path(day, activity), :class=>"btn btn-info fixedwidthbtn", method: :get, :remote => true

_form.html.erb This form partial is under the Activities View directory (../views/activities/_form.html.erb). 

<%= form_for([@day, @activity], :remote => true) do |f| %>
<fieldset>
  <%= f.label :title, "Activity" %>
  <%= f.text_field :title, :rows => 1 %> 
</fieldset>
  <div class="actions">
    <%= f.submit %>
  </div>
</form>
   <%= link_to 'Delete', [@day, @activity], method: :delete, data: { confirm: 'Are you sure?' } %>
<% end %>

edit.js.erb This is a file under the Activities view directory (../views/activities/edit.js.erb). Says to grab the DOM element with ID of "activity_form" and render the partial "form"

$("#activity_form").html("<%= escape_javascript(render(:partial => "form"))%>");

update.js.erb I included this javascript after hitting update on the Edit form to render an updated partial of the Activities List. So that I don't have to reload the page to see an update.

$("#activities_list").html("<%= escape_javascript( render(:partial => "/trips/activities") ) %>");

routes.rb This is how I nest my routes. Only doing it 1 level following best practices.

resources :trips do resources :days end

resources :days do resources :activities end

于 2012-11-10T21:49:31.423 に答える