Enhance VIRTUAL field detection in sequelize.js by implementing multiple identification methods, ensuring accurate model synchronization and preventing unintended field removals.

backend/utils/sequelize.js

@@ -422,10 +422,48 @@ const syncModelsAlways = async (models) => {
             const virtualFields = {};
             
             // Find and temporarily remove VIRTUAL fields
+            // Check multiple ways to identify VIRTUAL fields
             for (const [key, attr] of Object.entries(originalAttributes)) {
-                if (attr.type && attr.type.constructor && attr.type.constructor.name === 'VIRTUAL') {
+                // Check if it's a VIRTUAL field by checking the type
+                let isVirtual = false;
+                
+                if (attr.type) {
+                    // Method 1: Direct comparison with DataTypes.VIRTUAL
+                    if (attr.type === DataTypes.VIRTUAL) {
+                        isVirtual = true;
+                    }
+                    // Method 2: Check constructor name
+                    else if (attr.type.constructor && attr.type.constructor.name === 'VIRTUAL') {
+                        isVirtual = true;
+                    }
+                    // Method 3: Check if type key is VIRTUAL
+                    else if (attr.type.key === 'VIRTUAL') {
+                        isVirtual = true;
+                    }
+                    // Method 4: Check toString representation
+                    else if (typeof attr.type.toString === 'function') {
+                        const typeStr = attr.type.toString();
+                        if (typeStr.includes('VIRTUAL') || typeStr === 'VIRTUAL') {
+                            isVirtual = true;
+                        }
+                    }
+                    // Method 5: Check if it's an instance of VIRTUAL type
+                    else if (attr.type instanceof DataTypes.VIRTUAL || 
+                             (attr.type.constructor && attr.type.constructor === DataTypes.VIRTUAL.constructor)) {
+                        isVirtual = true;
+                    }
+                }
+                
+                // Also check if field has a getter but no setter (common pattern for VIRTUAL fields)
+                if (!isVirtual && attr.get && !attr.set && !attr.field) {
+                    // This might be a VIRTUAL field, but be careful not to remove real fields
+                    // Only remove if we're certain it's VIRTUAL
+                }
+                
+                if (isVirtual) {
                     virtualFields[key] = attr;
                     delete model.rawAttributes[key];
+                    console.log(`  ⚠️  Temporarily removed VIRTUAL field: ${key} from model ${model.name}`);
                 }
             }