Rails: How to DRY up multiple use of a partial - ruby-on-rails

Question

Like to DRY up the following code. Created a partial _user.html.erb, which is called either by the users view via
<%= render #users %>
and by the groups view via
<%= render partial: 'users/user', collection: #mailgroup.users, as: :user %>
The partial _user.html.erb is:
<%= content_tag_for(:tr, user) do %>
<td><%= user.id %></td>
<td><%= check_box_tag "user_ids[]", user.id, true %></td>
<td><%= user.firstname %></td>
<td><%= user.lastname %></td>
<td><%= user.function %></td>
<td><%= user.company %></td>
<td><%= user.appendix %></td>
<td><%= user.city %></td>
<td>
<%= link_to button1 ... %>
<%= link_to button2 ... %>
<%= link_to button3 ... %>
<%= link_to button4 ... %>
</td>
<% end %>
Now I like this partial having rendered once with all columns (call 1.), and also with a subset of columns (call 2.). Especially like to hide the check_box_tag in the second column.
I searched around and was confused at the end how to solve: With different layouts? How would I have to do it with partials? Or with checking first from what controller the call comes from? (This doesn't sound very satisfying to me).
In general: How to call the same partial with different subset of columns without maintaining different copies of that partial?

Answer 1

I'm not sure you can use layouts for partials and I agree that checking for controller source is a code smell. I would consider using another local to check if the fields are to be displayed which could be set in the "calling" view e.g.
<%= render #users, locals: {show_buttons: false} %>
<%= render partial: 'users/user', collection: #mailgroup.users, as: :user, show_buttons: true %>
and used in the user partial
<% if show_buttons %>
<td><%= check_box_tag "user_ids[]", user.id, true %></td>
<% end %>
You could dry this out further with a helper method
<td><%= user.id %></td>
<%= check_box(user, show_buttons)
module UsersHelper
def check_box(user, show_buttons)
if show_buttons
content_tag(:td) do
content_tag(:option, "user_ids[]", value: user.id )
end
end
end
end