Rails Create 302 Error - ruby-on-rails

Question

I am working on a toy web app to practice Ruby on Rails, and I've run into an issue that I haven't been able to figure out in the documentation. Essentially, I have a form to create tasks and relate them to users, but the form is issuing a 302 error when submitted and the record is not being saved.
I have two models, User and Task
User
class User < ApplicationRecord
has_many :tasks
end
Task
class Task < ApplicationRecord
belongs_to :article
end
The idea is simple, a user can have many tasks. The migrations for these are working fine.
I have created a (partial) form for creating tasks:
_compact_form.html.erb
<%= form_for( [#currentUser, #currentUser.tasks.build] ) do |f| %>
<p>
<%= f.label :label %>
<%= f.text_field :label %>
<%= f.label :complete %>
<%= f.check_box :complete%>
<%= f.submit %>
</p>
<% end %>
and this is attached to a dashboard view, which is trivially wired up to a dashboard controller:
class DashboardController < ApplicationController
def index
#currentUser = User.find(1)
end
end
All pretty straightforward so far. My tasks controller has a few methods to manage creation so far.
Tasks controller:
class TasksController < ApplicationController
def new
end
def show
#user = User.find( params[:user_id] )
end
def create
#user = User.find( params[:user_id] )
#task = #user.tasks.create( task_params )
redirect_to '/'
end
private
def task_params
params.require(:task).permit(:label, :complete)
end
end
And now we're at the point where I get confused. I've manually inserted a task into my database and I'm able to retrieve it just fine, but for some reason, my create route is giving an HTTP 302 error. I have set up my routes like so:
resources :users do
resource :tasks
end
root 'dashboard#index'
get 'dashboard/index'
and rake routes outputs
Prefix Verb URI Pattern Controller#Action
new_user_tasks GET /users/:user_id/tasks/new(.:format) tasks#new
edit_user_tasks GET /users/:user_id/tasks/edit(.:format) tasks#edit
user_tasks GET /users/:user_id/tasks(.:format) tasks#show
PATCH /users/:user_id/tasks(.:format) tasks#update
PUT /users/:user_id/tasks(.:format) tasks#update
DELETE /users/:user_id/tasks(.:format) tasks#destroy
POST /users/:user_id/tasks(.:format) tasks#create
users GET /users(.:format) users#index
POST /users(.:format) users#create
new_user GET /users/new(.:format) users#new
edit_user GET /users/:id/edit(.:format) users#edit
user GET /users/:id(.:format) users#show
PATCH /users/:id(.:format) users#update
PUT /users/:id(.:format) users#update
DELETE /users/:id(.:format) users#destroy
root GET / dashboard#index
dashboard_index GET /dashboard/index(.:format) dashboard#index
so the create route appears to be there, and it appears to be correct.
Now for the strangest part! If I use my form, this is what I see in the console:
User Load (0.3ms) SELECT "users".* FROM "users" WHERE "users"."id" = ? LIMIT ? [["id", 1], ["LIMIT", 1]]
(0.1ms) begin transaction
(0.1ms) commit transaction
This appears to be the correct code in my tasks#create method, so I'm pretty confused where the data is going. Can anyone shed some light into next steps for debugging this? I have spent some time creating different forms and working through the examples in this guide, but I seem to have made a mistake somewhere along the lines and I can't find it.

Answer 1

You should declare your redirection inside an respond_to block, redirects without format declaration cause 302 status responses because it doesn't know which kind of response to give for redirection, so it assumes your client would process the location header field that goes with the response, you should do something like this:
respond_to do |format|
format.html { redirect_to '/' }
end
302 status isn't an error, it is an indication of redirection and the redirected location is being sent as HTTP header. As far as model not being saved, you should provide better logs results, it could be a vast number of issues, like unpermitted params, validations, database error...