To those who come to this topic, please check out the last portion of this blog post. You can build a solution on those lines.

Thank you @NobbZ for the help.

I’m interested in this but is it up-to-date? I couldn’t compile it:

warning: variable "assigns" does not exist and is being expanded to "assigns()", please use parentheses to remove the ambiguity or change the variable name                                                        
  vlans.conf.eex:1                                                                                                                                                                                                 
                                                                                                                                                                                                                   
** (CompileError) vlans.conf.eex:2: expected "assigns" to expand to an existing variable or be part of a match                                                                                                     
    (elixir) expanding macro: Kernel.var!/1
    vlans.conf.eex:2: Render.vlans/1
    (elixir) expanding macro: Kernel.<>/2
    vlans.conf.eex:8: Render.vlans/1
    (elixir) expanding macro: Kernel.<>/2
    vlans.conf.eex:8: Render.vlans/1
    (elixir) expanding macro: Kernel.if/2
    vlans.conf.eex:1: Render.vlans/1

@amarandon sorry I didnt log into elixirforum for quite some time… Are you still facing this issue?

Unfortunately the blog is not online anymore. Could you tell me the basics of the solution?

Btw I found this : https://bash-shell.net/blog/phoenix-django-devs-block-tag/