Why should you care?

Sales needs fast search, pipeline stages, and activity timeline — classic MEAN CRUD plus real-time updates.

See it live — copy this example

Paste into your MeanVerse project (Angular + Express + MongoDB), then run with ng serve / node / mongosh as noted.

// meanverse-crm/
//   api/src/routes/deals.routes.ts
//   web/src/app/features/crm/deal.service.ts

router.patch('/deals/:id/stage', auth, async (req, res, next) => {
  try {
    const deal = await Deal.findOneAndUpdate(
      { _id: req.params.id, tenantId: req.tenantId },
      { $set: { stage: req.body.stage, updatedAt: new Date() } },
      { new: true }
    );
    io.to(`tenant:${req.tenantId}`).emit('deal:updated', deal);
    res.json(deal);
  } catch (e) { next(e); }
});

@Injectable({ providedIn: 'root' })
export class DealService {
  private http = inject(HttpClient);
  moveStage(id: string, stage: string) {
    return this.http.patch<Deal>(`/api/crm/deals/${id}/stage`, { stage });
  }
}

What happened?

• PATCH updates pipeline stage.
• Socket.IO broadcasts to tenant room so Kanban board updates live.
• DealService wraps HTTP for drag-drop UI.

Practice next

1. Model Lead, Contact, Deal with tenantId.
2. Build Angular pipeline columns by stage enum.
3. Emit socket on stage change.
4. Add activity timeline subdocument on deal save.
5. Export pipeline CSV from aggregation endpoint.

Remember

CRM = deals pipeline + activities + search. Real-time sync via Socket.IO optional. PATCH for stage transitions.

B2B sales team

20 reps drag deals across stages on shared board.

Outcome: Live updates prevent duplicate outreach on same lead.