Guide avancé de validation des formulaires dans Camunda 8

Les formulaires dans Camunda 8 ne servent pas uniquement d’interface utilisateur — ils contrôlent les décisions métier du workflow.

Dans un environnement réel, vous devez valider :

  • Champs obligatoires

  • Limites numériques

  • Conditions d’approbation

  • Dépendances entre champs

  • Cohérence des données

Objectif :
👉 Empêcher les données incorrectes avant que le processus continue.

📌 Pourquoi la validation est essentielle

Sans validation :

  • Mauvaises approbations

  • Mauvaise route dans le gateway

  • Données invalides envoyées au backend

  • Corrections manuelles fréquentes

🖼️ Validation des formulaires Camunda

🛠 1️⃣ Champs obligatoires

Exemple : commentaire obligatoire

{
  "label": "Commentaire Manager",
  "type": "textfield",
  "key": "managerComment",
  "validate": {
    "required": true
  }
}

La tâche ne peut plus être soumise vide.

🛠 2️⃣ Validation numérique

Montant entre 1 000 et 50 000

{
  "label": "Montant du prêt",
  "type": "number",
  "key": "loanAmount",
  "validate": {
    "min": 1000,
    "max": 50000
  }
}

🛠 3️⃣ Validation par expression régulière (Regex)

Format ID : EMP-1234

{
  "label": "ID Employé",
  "type": "textfield",
  "key": "employeeId",
  "validate": {
    "pattern": "^EMP-[0-9]{4}$"
  }
}

🛠 4️⃣ Validation conditionnelle

Si montant > 10 000 → justification obligatoire

{
  "label": "Raison",
  "type": "textfield",
  "key": "reason",
  "conditional": {
    "hide": false,
    "when": "loanAmount > 10000"
  },
  "validate": {
    "required": true
  }
}

🖼️ Champs dynamiques

🛠 5️⃣ Validation entre champs

Date fin > date début

{
  "label": "Date de fin",
  "type": "date",
  "key": "endDate",
  "validate": {
    "custom": "endDate > startDate"
  }
}

🛠 6️⃣ Validation côté backend (Très important)

La validation UI seule n’est pas suffisante.

Exemple Spring Boot :

if(amount > 50000){
    throw new IllegalArgumentException("Montant invalide");
}

Toujours valider côté service.

🛠 7️⃣ Protection des décisions BPMN

Gateway exemple :

loanAmount > 10000 → Manager
loanAmount <= 10000 → Auto approve

Si variable incorrecte → mauvais chemin.

🖼️ Impact sur workflow

🔐 Bonnes pratiques

✔ Valider UI + backend
✔ Utiliser des listes déroulantes
✔ Éviter texte libre pour données critiques
✔ Messages d’erreur clairs

⚠️ Erreurs fréquentes

Validation uniquement UI → contournement API
Pas de limites numériques → gateway cassé
Mauvais type variable → FEEL échoue

🎯 Conclusion

La validation avancée garantit :

  • Données fiables

  • Workflow correct

  • Automatisation stable

  • Moins d’intervention manuelle

Un formulaire doit être considéré comme une couche de règles métier.

💼 Support professionnel disponible

Si vous rencontrez des problèmes sur des projets réels liés au développement backend d’entreprise ou à l’automatisation des workflows, je propose des services de conseil payants, de débogage en production, de support projet et de formations ciblées.

Les technologies couvertes incluent Java, Spring Boot, PL/SQL, Azure, CMS, ainsi que l’automatisation des workflows (jBPM, Camunda BPM, RHPAM).

📧 Contact: ishikhanirankari@gmail.com | info@realtechnologiesindia.com

🌐 Website: IT Trainings | Digital lectern | Digital rostrum | Digital metal podium     



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