Cannot redirect to nil! - basic MVC operation

(I'm having some hard time for days to manage to chose a random item
from teh database and to be able to pass it further.)

It is basic operation and i tried several ways all, brought me to the
same problem, params {"id" = "random"} <- the name of the controller
method

controller:

def random # method works checked it in the console. Returns a valid
obj.
      @task = Task.find(rand(Task.first.id..Task.last.id))
      render "random"
    end

random.html.erb
       <%= @task %> # i want it to make it work, if i pass manually
lets #say `../random/1` lets say as an example it works it shows me the
memory #location of the object.

error log:

ActionController::ActionControllerError in TasksController#show
Cannot redirect to nil!

Rails.root: /home/bogdan/ex/bored
Application Trace | Framework Trace | Full Trace

actionpack (3.2.3) lib/action_controller/metal/redirecting.rb:60:in
`redirect_to'
actionpack (3.2.3) lib/action_controller/metal/flash.rb:25:in
`redirect_to'
actionpack (3.2.3) lib/action_controller/metal/instrumentation.rb:60:in
`block in redirect_to'
activesupport (3.2.3) lib/active_support/notifications.rb:123:in `block
in instrument'
activesupport (3.2.3)
lib/active_support/notifications/instrumenter.rb:20:in `instrument'
activesupport (3.2.3) lib/active_support/notifications.rb:123:in
`instrument'
actionpack (3.2.3) lib/action_controller/metal/instrumentation.rb:59:in
`redirect_to'
actionpack (3.2.3) lib/action_controller/metal/implicit_render.rb:4:in
`send_action'
actionpack (3.2.3) lib/abstract_controller/base.rb:167:in
`process_action'
.
.
.
(only the top of the stack)

Request

Parameters:

{"id"=>"random"}

controller:

def random
      @task = Task.find(rand(Task.first.id..Task.last.id))
      # REMOVE - UNNECESSARY render "random"
    end

random.html.erb
       <%= @task %> # i want it to make it work, if i pass manually
lets #say `../random/1` lets say as an example it works it shows me the
memory #location of the object.

@task.inspect would be more useful, or actually displaying some
specific attributes of the object :slight_smile:

error log:

ActionController::ActionControllerError in TasksController#show
Cannot redirect to nil!

But here, you're not even using your "random" method, you're calling
"show" -- check your routes.

well you are not using rest routes.
it should look like :
yourapp/tasks/4
rails would understand 4 as the param .