Rails no route error, while the rake routes gives the route - ruby-on-rails

Question

I am dealing with a nested resource "farm" in Rails, and my form for making new farm looks like this:
<%= form_for([#user, #farm], :url=> new_user_farm_path(#user)) do |f| %>
<% if #farm.errors.any? %>
<div id="error_explanation">
<h2><%= pluralize(#farm.errors.count, "error") %> prohibited this farm from being saved:</h2>
<ul>
<% #farm.errors.full_messages.each do |msg| %>
<li><%= msg %></li>
<% end %>
</ul>
</div>
<% end %>
<div class="field">
<%= f.label :name %><br />
<%= f.text_field :name %>
</div>
<div class="field">
<%= f.label :contact %><br />
<%= f.text_field :contact %>
</div>
<div class="field">
<%= f.label :adress %><br />
<%= f.text_field :adress %>
</div>
<div class="actions">
<%= f.submit %>
</div>
<% end %>
My corresponding "new" function in the farms controller is:
def new
#farm = Farm.new
#user = User.find(current_user)
respond_to do |format|
format.html # new.html.erb
format.json { render json: #farm }
end
end
It renders the form just fine, but after I click submit, and it actually tries to create new Farm, I get this error:
No route matches [POST] "/users/2/farm/new"
In my rake routes, I clearly have thie route showing:
user_farm POST /users/:user_id/farm(.:format) {:action=
create", :controller=>"farms"}
I am only guessing that the problem is in my create function:
def create
#farm = Farm.new(params[:farm])
#user = User.find(current_user)
respond_to do |format|
if #farm.save
format.html { redirect_to user_farm(#user, #farm), notice: 'Farm was successfully created.' }
format.json { render json: #farm, status: :created, location: #farm }
else
format.html { render action: "new" }
format.json { render json: #farm.errors, status: :unprocessable_entity }
end
end
end
My routes.rb file:
resources :users do
resource :farm
end
devise_for :users, :path => 'accounts'
I am accessing my new farm form via this link:
<%= link_to "New Farm", new_user_farm_path(current_user) %>
My entire rake routes:
user_farm POST /users/:user_id/farm(.:format) {:action=>"
create", :controller=>"farms"}
new_user_farm GET /users/:user_id/farm/new(.:format) {:action=>"
new", :controller=>"farms"}
edit_user_farm GET /users/:user_id/farm/edit(.:format) {:action=>"
edit", :controller=>"farms"}
GET /users/:user_id/farm(.:format) {:action=>"
show", :controller=>"farms"}
PUT /users/:user_id/farm(.:format) {:action=>"
update", :controller=>"farms"}
DELETE /users/:user_id/farm(.:format) {:action=>"
destroy", :controller=>"farms"}
users GET /users(.:format) {:action=>"
index", :controller=>"users"}
POST /users(.:format) {:action=>"
create", :controller=>"users"}
new_user GET /users/new(.:format) {:action=>"
new", :controller=>"users"}
edit_user GET /users/:id/edit(.:format) {:action=>"
edit", :controller=>"users"}
user GET /users/:id(.:format) {:action=>"
show", :controller=>"users"}
PUT /users/:id(.:format) {:action=>"
update", :controller=>"users"}
DELETE /users/:id(.:format) {:action=>"
destroy", :controller=>"users"}
new_user_session GET /accounts/sign_in(.:format) {:action=>"
new", :controller=>"devise/sessions"}
user_session POST /accounts/sign_in(.:format) {:action=>"
create", :controller=>"devise/sessions"}
destroy_user_session GET /accounts/sign_out(.:format) {:action=>"
destroy", :controller=>"devise/sessions"}
user_password POST /accounts/password(.:format) {:action=>"
create", :controller=>"devise/passwords"}
new_user_password GET /accounts/password/new(.:format) {:action=>"
new", :controller=>"devise/passwords"}
edit_user_password GET /accounts/password/edit(.:format) {:action=>"
edit", :controller=>"devise/passwords"}
PUT /accounts/password(.:format) {:action=>"
update", :controller=>"devise/passwords"}
cancel_user_registration GET /accounts/cancel(.:format) {:action=>"
cancel", :controller=>"devise/registrations"}
user_registration POST /accounts(.:format) {:action=>"
create", :controller=>"devise/registrations"}
new_user_registration GET /accounts/sign_up(.:format) {:action=>"
new", :controller=>"devise/registrations"}
edit_user_registration GET /accounts/edit(.:format) {:action=>"
edit", :controller=>"devise/registrations"}
PUT /accounts(.:format) {:action=>"
update", :controller=>"devise/registrations"}
DELETE /accounts(.:format) {:action=>"
destroy", :controller=>"devise/registrations"}
user_confirmation POST /accounts/confirmation(.:format) {:action=>"
create", :controller=>"devise/confirmations"}
new_user_confirmation GET /accounts/confirmation/new(.:format) {:action=>"
new", :controller=>"devise/confirmations"}
GET /accounts/confirmation(.:format) {:action=>"
show", :controller=>"devise/confirmations"}
user_unlock POST /accounts/unlock(.:format) {:action=>"
create", :controller=>"devise/unlocks"}
new_user_unlock GET /accounts/unlock/new(.:format) {:action=>"
new", :controller=>"devise/unlocks"}
GET /accounts/unlock(.:format) {:action=>"
show", :controller=>"devise/unlocks"}
home_index GET /home/index(.:format) {:controlle
r=>"home", :action=>"index"}
root / {:controlle
r=>"home", :action=>"index"}

Answer 1

The problem is that your form is attempting to make a POST request to a url that only exists for GET requests. So it's telling you that
[POST] "/users/2/farm/new"
doesn't exist -- which it doesn't. And your rake routes output confirms this -- the cloesst thing is
new_user_farm GET /users/:user_id/farm/new(.:format)
which is a GET request.
Forms default to using POST for new record creation, so you need to supply a url that can be POSTed to. Or you can let Rails figure it out from the state of your objects. So either
<%= form_for([#user, #farm], :url=> user_farm_path(#user)) do |f| %>
OR
<%= form_for([#user, #farm]) do |f| %>
should work. In the former case we're using a named route that matches a POST route from your rake routes output. In the latter case we're letting rails figure it out based on the state of your #farm object. That is, if #farm is a new_record? it'll submit a POST request to /users/:user_id/farm, or if #farm is persisted? then it'll submit a PUT request to /users/:user_id/farm. (Same path, just different request type.)

Answer 2

Some issues:
--
Params
When you create a new ActiveRecord object in Rails, you'll want to use strong params:
#app/controllers/farms_controller.rb
Class FarmsController < ApplicationController
def new
#farm = Farm.new
end
def create
#farm = Farm.new(farm_params)
end
private
def farm_params
params.require(:farm).permit(:params, :for, :farm)
end
end
--
Routes
You're using nested routing, which can be tricky if you're not used to it.
If you haven't already, you should do this with your routes:
#config/routes.rb
resources :users do
resources :farm #-> /users/3/farm/new
end
This will give you the ability to reach that route either from your controller or views.
If you give me some more info (Routes file), I'll be able to help further!
--
POST
Having looked over the issue again, it seems I made an oversight before!!!
As pointed out by pdbobb, the error certainly says you're trying to reach /new with a POST verb. This is not correct, as according to the Rails resourceful routing conventions, you need to
You'll be able to use pdobb's answer, but more importantly, we need to establish why your form is trying to submit to the new post.
The problem is likely with your nested resource