I've got a form 'tasks' and I am dynamically adding a child 'steps' form.

The 'steps' is added through a javascript call to render('steps/form').

The form loads fine, but when submitting the tasks form, the added step is not put into the database.

I assume this is because I'm not linking the two forms together, but I'm not entirely sure.

My code is Tasks/new.html.erb

<%= form_for @task, :html=>{:multipart=>true} do |f| %>
  <%= f.label :task_name %>
  <%= f.text_field :task_name %>
  
<%= link_to "Add Step", @step, :remote=>true, :class=>'addStep %开发者_运维问答>
<%= f.submit %>
<% end %>

<% content_for(:js) do %>
   $('a.addStep').click(function(){
      $('div#newStep').append("<%= escape_javascript(render('steps/form'))%>");
   });
<% end %>

the steps/_form.html.erb is

<p class="fields">
   <%= fields_for :steps do |builder| %>
   <%= builder.label :title %>
   <%= builder.text_field :title %>
<% end %>

I believe the problem is that i'm not passing 'f' or 'task' into the 'step' form, but I couldn't figure out how to do that.

Try something like this:

<%= render :partial => 'steps/form',
             :locals => {:form => f} %>

Hope this helps.

Edit- 1

Do as follows:

<%= form_for @task, :html=>{:multipart=>true} do |f| %>
  <%= f.label :task_name %>
  <%= f.text_field :task_name %>
  <div style="display:none;" id="steps_form">
       <%= render :partial => 'steps/form',
               :locals => {:form => f} %>
  </div>
<%= link_to "Add Step", @step, :onClick=>"js_function_to_change_display_property()", :class=>'addStep' %>
<%= f.submit %>
<% end %>

then you can use simple javascript to view the steps form by changing the display property of steps_form.

You might have to update the params in your parent controller to include the attributes of the child. e.g.

controllers/task_controller.rb

Class TasksController < ApplicationController
  ...

  def task_params
    params.require(:task).permit :name, :description ,
      steps_attributes: [:step, :step_description, :due_date]
  end
end

models/task.rb

Class Task < ActiveRecord::Base
  has_many :steps
  accepts_nested_attributes_for :steps
end

models/step.rb

Class Step < ActiveRecord::Base
  belongs_to :task
end