PostHog/posthog

Feature request: Indicate when cohort is in use on feature flag etc

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#25935 opened on Oct 31, 2024

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backlogenhancementfeature/cohortsgood first issueteam/feature-flags

Description

Feature request

Is your feature request related to a problem?

When I'm looking at a cohort, I would like to know if that cohort is already being used somewhere as a feature flag target.

Describe alternatives you've considered

When viewing or editing an existing cohort, I'll like to see some info near the top of the page indicating whether the cohort is currently being used in any feature flags, insights, etc, with links to each place the cohort is currently being referenced.

Additional context

From: https://posthoghelp.zendesk.com/agent/tickets/19526

Debug info

No response

Contributor guide

Tech stack
pythontypescriptreactpostgresql
Domain
frontendanalytics
Issue type
feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-2 days
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
clear
Prerequisites
Basic knowledge of React componentsUnderstanding of PostHog's cohort and feature flag data models
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
35
Research direction
Start by understanding how cohorts are currently displayed in the frontend (e.g., CohortPage component) and how feature flags reference cohorts (likely in the FeatureFlag model). Implement a backend API endpoint (e.g., /api/cohort/:id/usage) that queries the database for feature flags and insights using that cohort. Then, in the cohort detail view, fetch this data and display usage links. The issue references a Zendesk ticket (19526) for additional context.