Can I update a user's attributes with a form in rails? - ruby-on-rails

Question

is there a way i can use a form to update a user's points in rails with a simple form that takes in the name and the points I want to append?
Heres the link to the app i made : enter link description here
my view for the index is :
<div class="container">
<h1 class="text-center">Listing Students</h1>
<div class ="jumbotron">
<table class="table table-hover">
<thead>
<tr>
<th>Name</th>
<th>Points</th>
</tr>
</thead>
<% #users.each do |user| %>
<tr>
<td><%= user.name %></td>
<td><%= user.points %></td>
<td><%= link_to 'Edit', edit_user_path(user) %></td>
<td><%= link_to 'Delete', user, method: :delete, data: { confirm: 'Are you sure?' } %></td>
</tr>
<% end %>
</tbody>
</table>
</div>
<br>
<%= link_to 'New Student', new_user_path, class:'btn btn-primary' %>
</div>
I tried using the code in my edit page :
<div class="container">
<div class=" text-center">
<div class="col-md-6 col-md-offset-3">
<div class= "well well-lg">
<%= render 'form' %>
<%= link_to 'Back', users_path, class:"back" %>
</div>
</div>
</div>
</div>
to render the form in the index but it gives me an error of #user can not be nill
I simply need to update the users points in the index page , it would be great if i can greate a modal to appear and then type in the name and edit it. Ive been working on this for hours and seem to update it .

Answer 1

Sure, you could use simple_form or form_for. Or you could do inplace editing. Your question is not very precise as to what exactly you need.
UPDATE 1:
Assuming that you have added simple_form gem to the gemfile, and that you have something like this in the routes.rb : resources :users, then edit view of the UsersController could look something like this:
#in controller
def edit
#user = User.find(params['id'])
end
And the view:
<%= simple_form_for #user do |f| %>
<%= f.input :name %>
<%= f.input :points %>
<%= f.button :submit %>
<% end %>
Please try it and let me know if it works for you (the edit view; in order to persist, you will need and update action as well).

Answer 2

Add a div on index page to open modal popup:
<div class='modal_popup>
</div>
For updating name and points of user on index page, you have to change edit link like this:
<%= link_to 'Edit', edit_user_path(user), remote: true %>
Controller changes:
def edit
#user = User.find(params[:id])
end
_modal.html.erb
<div class="modal">
<div class="modal-dialog">
<div class="modal-content">
<div class="modal-header">
<button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">×</span></button>
<h4 class="modal-title">Modal title</h4>
</div>
<%= form_for #user, remote: true do |f| %>
<div class="modal-body">
<%= f.text_field :name %>
<%= f.text_field :points %>
</div>
<div class="modal-footer">
<button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
<%= f.submit 'Update', class: "btn btn-primary" %>
</div>
<% end %>
</div><!-- /.modal-content -->
</div><!-- /.modal-dialog -->
</div><!-- /.modal -->
edit.js.erb
$('.modal_popup').html("<%= j(render partial: '/users/modal') %>");
$('.modal').show();
After updating user in update.js.erb add below lines of code:
$('.modal').hide();
window.location.reload();
Hope this may help..