From c28f8b13842c0d91758a01a16d61ae1bc1d26a7e Mon Sep 17 00:00:00 2001
From: "Torsten Schulz (local)" <tsschulz@gmx.net>
Date: Thu, 18 Dec 2025 16:45:56 +0100
Subject: [PATCH] Enhance foreign key management in sequelize.js by refining
 schema handling and improving logging for foreign key removal during model
 synchronization. Add detailed console outputs for better visibility on
 foreign key operations and error handling.

---
 backend/utils/sequelize.js | 15 ++++++++++++---
 1 file changed, 12 insertions(+), 3 deletions(-)

diff --git a/backend/utils/sequelize.js b/backend/utils/sequelize.js
index 1b6a84b..3057f51 100644
--- a/backend/utils/sequelize.js
+++ b/backend/utils/sequelize.js
@@ -493,7 +493,10 @@ const syncModelsAlways = async (models) => {
                 // Entferne bestehende Foreign Keys vor dem Sync, damit Sequelize sie nicht aktualisiert
                 try {
                     const tableName = model.tableName;
-                    const schema = model.schema || model.options?.schema || 'public';
+                    // Schema kann eine Funktion sein, daher prüfen wir model.options.schema direkt
+                    const schema = model.options?.schema || 'public';
+                    
+                    console.log(`  🔍 Checking for foreign keys in ${schema}.${tableName}...`);
                     const foreignKeys = await sequelize.query(`
                         SELECT tc.constraint_name
                         FROM information_schema.table_constraints AS tc
@@ -506,16 +509,22 @@ const syncModelsAlways = async (models) => {
                     });
                     
                     if (foreignKeys && foreignKeys.length > 0) {
-                        console.log(`  ⚠️  Removing ${foreignKeys.length} existing foreign keys from ${model.name} before sync`);
+                        console.log(`  ⚠️  Found ${foreignKeys.length} existing foreign keys:`, foreignKeys.map(fk => fk.constraint_name).join(', '));
+                        console.log(`  ⚠️  Removing ${foreignKeys.length} existing foreign keys from ${model.name} (schema: ${schema}) before sync`);
                         for (const fk of foreignKeys) {
+                            console.log(`  🗑️  Dropping constraint: ${fk.constraint_name}`);
                             await sequelize.query(`
                                 ALTER TABLE "${schema}"."${tableName}" 
-                                DROP CONSTRAINT IF EXISTS "${fk.constraint_name}"
+                                DROP CONSTRAINT IF EXISTS "${fk.constraint_name}" CASCADE
                             `);
                         }
+                        console.log(`  ✅ All foreign keys removed for ${model.name}`);
+                    } else {
+                        console.log(`  ✅ No foreign keys found for ${model.name}`);
                     }
                 } catch (fkError) {
                     console.warn(`  ⚠️  Could not remove foreign keys for ${model.name}:`, fkError.message);
+                    console.warn(`  ⚠️  Error details:`, fkError);
                 }
                 
                 console.log(`  🔄 Syncing model ${model.name} with constraints: false`);