simple_module_feature_flags
Feature flags for simple_module apps. Global flags with per-tenant overrides, a tiny consumer API, and no external service to run.
Install
pip install simple_module_feature_flags
What it provides
- Flags are declared via the framework
register_feature_flagshook (FeatureFlagDefinition(name, default_enabled=...)); the module persists only overrides in thefeature_flags_overrideSQLModel table (scoped byscope/scope_id). FeatureFlagRegistry.is_enabled("flag.name", tenant_id=...)consumer API (resolution order: tenant override > system override > declared default).- Admin UI at
/feature_flags— toggle flags, add per-scope overrides. - The registry is an in-memory cache hydrated from the DB so checking a flag on every request is cheap.
Usage
Declare a flag in your module:
from simple_module_core.feature_flags import FeatureFlagDefinition, FeatureFlagRegistry
class OrdersModule(ModuleBase):
def register_feature_flags(self, registry: FeatureFlagRegistry) -> None:
registry.add(FeatureFlagDefinition(name="orders.new_pricing_engine", default_enabled=False))
Gate a route using the registry dependency:
from fastapi import APIRouter, HTTPException
from feature_flags.deps import FeatureFlagRegistryDep # type: ignore[import-not-found]
router = APIRouter()
@router.get("/new-feature")
async def new_feature(flags: FeatureFlagRegistryDep):
if not flags.is_enabled("orders.new_pricing_engine"):
raise HTTPException(404)
return {"rolled_out": True}
Overrides (system or per-tenant) are managed through the admin UI at /feature_flags.
Depends on
simple_module_core,simple_module_db,simple_module_hosting
License
MIT — see LICENSE.
1 maintainer
Metadata
1 maintainer
Release files for simple-module-feature-flags 0.0.35
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