How to show a banner if any flag enabled

[17lwinn]

I have everything set up but what I want to do is show a banner saying 'your using a beta feature' when ANY flag is enabled.

How could I do this? Preferably in the template

[willbarton]

@17lwinn Currently there isn't a built-in way to do that without checking each flag individually.

I think you could probably use a custom condition that checks if any other flag is enabled:

from flags import conditions
from flags.sources import get_flags
from flags.state import flag_enabled

@conditions.register('any other flag is enabled')
def any_other_flag_is_enabled_condition(path, request=None, **kwargs):
    for flag in get_flags():
        try:
            if flag_enabled(flag, request=request, **kwargs):
                return True
        except conditions.RequiredForCondition:
            pass

(Note: I don't think something like any(flag_enabled(flag) for flag in get_flags()) will work because flag state checking can raise a RequiredForCondition if one of the flag's conditions requires additional keyword arguments to check.)

And then use that to enable a banner flag specifically:

FLAGS = {
    'BETA_FEATURE_NOTICE': [
        {'condition': 'any other flag is enabled'},
    ],
}

Then use it in a template:

{% load feature_flags %}
{% flag_enabled 'BETA_FEATURE_NOTICE' as beta_notice_flag %}
{% if beta_notice_flag %}
  <div>
    You're using a beta feature.   
  </div>
{% endif %}

This is all pseudo-code right now, I haven't tried it. But that's probably where I would start trying to enable a banner based on any other flag condition.

[17lwinn]

I'll see if this works, thanks for your help!

[17lwinn]

Hi sorry to reopen but where exactly would I put the condition code?

[willbarton]

No problem at all!

The custom condition can go in any module in your app that gets loaded when the app is ready.

So, you could put it in a myapp/flag_conditions.py module, and then in the app config class import it, something like this:

# myapp/apps.py
from django.apps import AppConfig

class MyAppConfig(AppConfig):
    def ready(self):
        import myapp.flag_conditions

By importing it, the condition will be registered and can then be used.

[17lwinn]

okay! thanks for your help @willbarton!