Variant

it acts like a feature toggle.

feature.variant

It returns a handler to be used with feature.add, the provided function is used with feature.get_variant.

Variant params

• name (str): toggle name.
• frontend (bool=True): if true, it could be accessed using an API Rest.
• default (Optional[str]=None): if it returns None, it uses this value instead.

Decorated function params

• **named (Any): any argument, any type.

Example

from capyc.core.managers import feature
from yourapp.models import User


@feature.variant("admissions.academy.brand-color")
def brand_color() -> bool:
    return os.getenv("BRAND_COLOR")


@feature.variant("auth.alert-color")
def alert_color(user: User) -> bool:
    if  user.id % 15 == 0:
        return "VIOLET"

    if "@gmail" in user.email:
        return "ORANGE"

    return "YELLOW"


feature.add(brand_color, alert_color)

feature.get_variant

Get the result of the evaluation of the provided function, if None, get the default provided, else unknown.

params

• name (str): toggle name.
• context (dict[str, Any]={}): function arguments.
• default (Optional[str]=None): if it returns None, it uses this value instead.

Example

from capyc.core.managers import feature
from yourapp.models import User


# make sure that flags have been loaded previously.
variant1 = feature.get_variant("admissions.academy.brand-color", default="BLUE")

user1 = User.objects.get(id=1)
variant2 = feature.get_variant("auth.alert-color", context={'user': user1})

user2 = User.objects.get(id=2)
context = feature.context(user=user2)
variant3 = feature.get_variant("auth.alert-color", context=context)