https://sonarly.com/issue/4334?type=bug The `createDirectSubscription` method throws a `BillingException` when a user's workspace already has a non-canceled subscription, instead of returning the existing subscription's success URL. This is triggered by duplicate form submissions (double-click, browser back + retry) on the 7-day no-credit-card trial flow. Fix: **Backend** (`billing-portal.workspace-service.ts`): Replaced the `throw new BillingException('Customer already has a non-canceled billing subscription')` with `return successUrl`. When a workspace already has a non-canceled subscription (from a prior successful request), the method now returns the success URL idempotently instead of throwing an error. This makes `createDirectSubscription` safe to call multiple times — the first call creates the subscription, and subsequent calls simply redirect the user to the success page. **Frontend** (`useHandleCheckoutSession.ts`): Added a `useRef`-based guard (`isSubmittingRef`) that synchronously prevents duplicate submissions. Unlike React `useState` (which is async and allows re-entry during the same render cycle), `useRef` is checked and set synchronously before the mutation fires. On error, both the ref and state are reset so the user can retry. On success, the ref stays locked since the user is being redirected.
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Installation
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Why Twenty
We built Twenty for three reasons:
CRMs are too expensive, and users are trapped. Companies use locked-in customer data to hike prices. It shouldn't be that way.
A fresh start is required to build a better experience. We can learn from past mistakes and craft a cohesive experience inspired by new UX patterns from tools like Notion, Airtable or Linear.
We believe in Open-source and community. Hundreds of developers are already building Twenty together. Once we have plugin capabilities, a whole ecosystem will grow around it.
What You Can Do With Twenty
Please feel free to flag any specific needs you have by creating an issue.
Below are a few features we have implemented to date:
- Personalize layouts with filters, sort, group by, kanban and table views
- Customize your objects and fields
- Create and manage permissions with custom roles
- Automate workflow with triggers and actions
- Emails, calendar events, files, and more
Personalize layouts with filters, sort, group by, kanban and table views
Customize your objects and fields
Create and manage permissions with custom roles
Automate workflow with triggers and actions
Emails, calendar events, files, and more
Stack
- TypeScript
- Nx
- NestJS, with BullMQ, PostgreSQL, Redis
- React, with Jotai, Linaria and Lingui
Thanks
Thanks to these amazing services that we use and recommend for UI testing (Chromatic), code review (Greptile), catching bugs (Sentry) and translating (Crowdin).
Join the Community
- Star the repo
- Subscribe to releases (watch -> custom -> releases)
- Follow us on Twitter or LinkedIn
- Join our Discord
- Improve translations on Crowdin
- Contributions are, of course, most welcome!




