Can't get nested form to show - ruby-on-rails

Question

Below are my models:
class Ticket < ActiveRecord::Base
attr_accessible :issue, :logs_attributes
has_many :logs
accepts_nested_attributes_for :logs
end
class Log < ActiveRecord::Base
attr_accessible :detail, :ticket_id
belongs_to :ticket
end
I'm trying to figure out how to create new log via the ticket view, but I can't get the detail field in the log model to show.
My attempt on the views:
tickets_form
<%= form_for(#ticket) do |f| %>
<% if ... end %>
<div class="field">
<%= f.label :issue %><br />
<%= f.text_area :issue %>
</div>
<% f.fields_for :logs do |builder| %>
<p>
<%= builder.label :detail %><br />
<%= builder.text_area :detail %>
</p>
<% end %>
<div class="actions">
<%= f.submit %>
</div>
<% end %>
tickets\show
<p id="notice"><%= notice %></p>
<p>
<b>Issue:</b>
<%= #ticket.issue %>
</p>
<ol>
<% for log in #ticket.logs %>
<p>
<%=log.detail %> *Note:squiggly line under detail said "Cannot find 'detail'"*
</p>
<% end %>
</ol>
<%= link_to 'Edit', edit_ticket_path(#ticket) %> |
<%= link_to 'Back', tickets_path %>
My Controller:
def new
#ticket = Ticket.new
respond_to do |format|
format.html # new.html.erb
format.json { render json: #ticket }
end
end
def create
#ticket = Ticket.new(params[:ticket])
respond_to do |format|
if #ticket.save
format.html { redirect_to #ticket, notice: 'Ticket was successfully created.' }
format.json { render json: #ticket, status: :created, location: #ticket }
else
format.html { render action: "new" }
format.json { render json: #ticket.errors, status: :unprocessable_entity }
end
end
end
Ticket\show
<h1>New ticket</h1>
<%= render 'form' %>
<%= link_to 'Back', tickets_path %>

Answer 1

Your attr_accessible line in Ticket class should be attr_accessible :issue, :logs_attributes.
Otherwise you should get(if you are using rails version < 4):
Can't mass-assign protected attributes: logs_attributes
If you don't get it there must be a problem with your controller create action(can you update your question with a controller code?)
It should look something like this:
def new
#ticket = Ticket.new
respond_to do |format|
format.html # new.html.erb
format.json { render json: #ticket }
end
end
def create
#ticket = Ticket.new(params[:ticket])
respond_to do |format|
if #ticket.save
format.html { redirect_to #ticket, notice: 'Ticket was successfully created.' }
format.json { render json: #ticket, status: :created, location: #ticket }
else
format.html { render action: "new" }
format.json { render json: #ticket.errors, status: :unprocessable_entity }
end
end
end
This simple create action together with fields_for call in your tickets_form and accepts_nested_attributes_for :logs in Ticket class will crate both parent and association object in a one go.
tickets/new.html.erb should look something like this:
<h1>New ticket</h1>
<%= render 'form' %>
<%= link_to 'Back', tickets_path %>
And the form partial tickets/_form.html.erb should be:
<%= form_for(#ticket) do |f| %>
<% if ... end %>
<div class="field">
<%= f.label :issue %><br />
<%= f.text_area :issue %>
</div>
<% f.fields_for :logs do |builder| %>
<p>
<%= builder.label :detail %><br />
<%= builder.text_area :detail %>
</p>
<% end %>
<div class="actions">
<%= f.submit %>
</div>
<% end %>
Off topic:
A bit more Rails way to do this(just a suggestion):
<% for log in #ticket.logs %>
<p>
<%=log.detail %>
</p>
<% end %>
Would be:
<% #ticket.logs.each |log| %>
<%= content_tag(:p, log.detail) %>
<% end %>