ruby on rails - Using nested routes and nested attributes together (and optionally) -


trying pretty straightforward.

i have system have clients have tasks have files , notes

i can create task not related 1 particular client.

i want able create new task, client screen , populate client field (or have populated in background) wihtout having select it. of course, i'll need client selector if create task , want attach client it.

hope makes sense

i have nested route follows:

resources :clients   resources :notes   resources :tasks     resources :notes     resources :task_files   end end resources :tasks   resources :notes   resources :task_files end

and load of stuff relating nested attributes etc works.

the 1 thing can't quite work out how use same _form when i'm creating task, , when i'm creating task when know client. e.g. clients/:id/tasks/new vs tasks/new

my gut feel if put @project _form la: 

<%= simple_nested_form_for [@client,@task], html:{multipart: true} |f| %>

then it's not going work tasks without clients whereas:

<%= simple_nested_form_for @task, html:{multipart: true} |f| %>

doesn't preselect client in:

 <%= f.input :client_id, :collection => client.accessible_by(current_ability, :read), :as => :select, :label => "client" %>

which used if there no client preselected.

any ideas how work, maybe being able use parameter @client.id in way? have tried @client, @client.id , :client_id no joy.

am sure must pretty simple...

to clarify: if client present (i.e. known through url) i'd preselect client , not allow changed. if client id not present, i'd user able select client applies (or leave blank).

it sounds creating task form, , never creating client, use 

<%= simple_form_for @task |f| %>

and include inputs making new task. in form making task, can check whether user instance variable of @user defined not. if you're @ nested route, should defined, , can hidden field assign client_id. 

<% if defined?(@user) %>   <%= f.hidden_field, :client_id, value: @user.id %> <% else %>   <%= f.input :client_id, :collection => client.accessible_by(current_ability, :read), :as => :select, :label => "client", :value_method  => :id %> <% end %>

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