Issue with Users Service and Layouts when using IDE

[andrewbillcliffe]

I have an app that I built a Layout for using the tutorial. I then create a new form and use the layout as the template. that works fine.
When i activate the users service and add

anvil.users.login_with_form()

to the layouts __init__ method, underneath the self.init_components(**properties) line then it doesnt allow me to view the design tab of any forms that use the layout as a template, i just get this:

but i can use the code tab and view all the code for that form.

if i want to edit anything in the form (SDVS in this example), i need to go back to the layout (Homepage) and comment out the

anvil.users.login_with_form()

and then the form design tab works… am i doing something wrong here?

[socint]

Weird. Try something like:

if not anvil.users.get_user():
   print(“okay so far”)
   try: 
      anvil.users.login_with_form()
      print(“phew”)
   except:
      print(“gone wonky”)

Give the app a run an see what happens.

Try it first in the Layout and see what happens on a page running the Layout. Then use the code on the page using the Layout but not the layout itself.

Process of elimination.

[andrewbillcliffe]

very good point @socint ! if I put

anvil.users.login_with_form()

on the form rather than the layout template it works fine… weird indeed. But, by having it in the form it doesnt trigger the login function.
will continue to play around!

[p.colbert]

I wonder if

@andrewbillcliffe

anvil.users.login_with_form()

is interfering with the IDE’s Designer. If it’s trying to run Layout code at Design time, as happens with many Custom Components, then you can prevent that. See “as-yet-undocumented but useful feature” in:

Question about Custom Components in Beta Designer

Ah, that would do it! There’s a limited set of modules available inside the designer, but we’ll add anvil.tz to it However, here’s an as-yet-undocumented but useful feature: You can write: from anvil.designer import in_designer and now you have a boolean variable called in_designer, which you can use! So for example, you could replace your import anvil.tz with: from anvil.designer import in_designer if not in_designer: import anvil.tz Then you won’t get the ImportError in the d…

[socint]

What happens if you move it into form_show in the layout?

[andrewbillcliffe]

it allows me to view the design tab but doesnt present the login form. been playing around with it for a while but about to give up

[socint]

What about trying the mystic route, what happens if you:

from anvil.designer import in_designer
if not in_designer:
    import anvil.users

Or something. I dunno

[p.colbert]

More likely:

from anvil.designer import in_designer
.
.
.

        if not in_designer:
            anvil.users.login_with_form()

[socint]

That’s what the dark recesses of my brain meant

[andrewbillcliffe]

many thanks @socint @p.colbert, that worked a treat!