Rails partial not refreshing with create action - ruby-on-rails

Question

I realize there are dozens of similar questions here on this topic, I have looked through many of them and tried to duplicate the solutions and nothing has worked for me.
I have a list of tasks displayed in the index view as a partial, when the user adds a task I would like list to show the newest task (as well as all the others already there).
Here is the create controller:
def create
#task = current_user.tasks.build(task_params)
if #task.save
flash[:success] = "Task added"
respond_to do |format|
format.js
end
else
flash[:error] = "Task not added"
render 'new'
end
The _new partial:
<%= form_for(#task, method: :post, remote: true) do |f| %>
<%= f.label :comments %>
<%= f.text_field :comments, id: "task-comments" %>
<%= f.submit "Insert" %>
<% end %>
Index.html.erb
<div id="new-task-form">
<%= render 'new' %>
</div>
<div id="current-tasks">
<%= render partial: 'show_list', locals: {tasks: #tasks} %>
</div>
create.js.erb
console.log("create.js.erb called");
document.getElementById("task-comments").value = "";
document.getElementById("current-tasks").html('<%= j(render partial: "show_list") %>');
I have been able to get the console to log the message and even been able to clear the input box but the partial does not render, I have tried this in a few different ways and the script always seems to stop executing when it gets to the escape javascript line.
There are no JS errors, as stated above, the console logs the message when the "submit" button is pressed. There is a warning [Violation] Forced reflow while executing JavaScript took 114ms but I don't think that is relevant to this issue.
Here is the partial that I am trying to render _show_list.html.erb
<% unless #tasks.nil? %>
<ul>
<% tasks.each do |tsk| %>
<li><%= tsk.comments %></li>
<% end %>
</ul>
<% end %>

Answer 1

def create
#task = current_user.tasks.build(task_params)
if #task.save
flash[:success] = "Task added"
#respond_to do |format|
#format.js
#end
else
flash[:error] = "Task not added"
render 'new'
end
end
It's always good practice to use local variable in partial
1) => Index.html.erb
<div id="new-task-form">
<%= render 'new' %>
</div>
<div id="current-tasks">
<%= render partial: 'show_list', locals: {tasks: #tasks} %>
</div>
2) => If you are using jquery (create.js.erb)
console.log("create.js.erb called");
$("#task-comments").val('');
$("#current-tasks").html('<%= j render "show_list", tasks: #tasks) %>');
3) => _show_list.html.erb(Use tasks instead of #tasks)
<% unless tasks.blank? %>
<ul>
<% tasks.each do |tsk| %>
<li><%= tsk.comments %></li>
<% end %>
</ul>
<% end %>

Answer 2

ok you have some problem here with your validation on the show_list partial.
you have this line
<% unless #tasks.nil? %>
try to use something more readable like
<% if #tasks.present? %>
and on your controller create action, you don't fill the #tasks variable, so that's the problem in reality, add on you controller the load for all the tasks after saving the new one.
if #task.save
#tasks = Task.all
flash[:success] = "Task added"
and that will make it work, but I recommend to load just the created one and add just one column to the table and not update the complete list again if you have all the others on the client already.