I want to display a root page which shows a turbo frame with a form for creating a new object. However the routing doesn't work as I want, because I get the above mentioned error.
routes.rb
namespace :cust do
resources :customer_dates, only: [:index, :show, :create, :new]
end
root "cust/customer_bookings#index"
/views/cust/customer_bookings/index.html.erb
<div><%= render "main" %></div>
/views/cust/customer_bookings/_main.html.erb
<%= turbo_frame_tag @customer_date do %>
<%= render new_cust_customer_date_path, customer_date: @customer_date %>
<% end %>
Error
ActionView::Template::Error (Missing partial cust/customer_dates/_new with {:locale=>[:en], :formats=>[:html], :variants=>[], :handlers=>[:raw, :erb, :html, :builder, :ruby, :jbuilder]}.
And the line causing the error is the one in _main.html.erb with new_cust_customer_date_path.
In /views/cust/customer_dates folder I have the views new.html.erb and _form.html.erb
new_cust_customer_date_path is a url helper, you can use it with link_to, button_to, form_with url: etc. render works with your local files, which may or may not match the url path.
To clarify:
"localhost:3000/cust/customer_dates/new" # request from the browser
# bin/rails routes # will match one of the routes
namespace :cust do # `/cust` to `module Cust`
resources :customer_dates, # `/customer_dates` to `CustomerDatesController`
only: [:index, :show, :create, :new] # `/new` to `def new`
end # Cust::CustomerDatesController#new
def new # controller action
@customer_date = CustomerDate.new # do some things
# unless you render something, rails
# render :new # will implicitly `render "#{action_name}"`
end # in controllers, `render` defaults to
new.html.erb # rendering a template with layout:
# render template: "cust/customer_dates/new", layout: "application"
Inside the views, render defaults to rendering a partial and no layout.
new_cust_customer_date_path #=> /cust/customer_dates/new
<%= render "/cust/customer_dates/new", customer_date: @customer_date %>
# which is the same as
<%= render partial: "/cust/customer_dates/new", locals: { customer_date: @customer_date } %>
# partial is the same as template, but will auto prefix `_` to the filename
<%= render template: "/cust/customer_dates/_new", locals: { customer_date: @customer_date } %>
Since you don't have _new.html.erb file, you get an error. If you need to render a form, you can do this:
<%= render "cust/customer_dates/form", customer_date: @customer_date %>
# ^
# form is a partial `_form`
# or render `new.html.erb` as a template (no underscore)
# v
<%= render template: "cust/customer_dates/new", locals: { customer_date: @customer_date } %>
Note that "cust/customer_dates/new" is just a path relative to app/views.