fix(compat): get_compatibility used wrong connection for master tables

inventory_vehicle_compat.get_compatibility was trying to JOIN tenant
inventory_vehicle_compat with master tables (model_year_engine, brands,
models, years, engines) on a single tenant connection. Those tables only
exist in the master DB, causing the query to fail silently.

Fix: split into two queries:
  1. Fetch MYE IDs from tenant's inventory_vehicle_compat
  2. Resolve vehicle details from master DB via ANY(%s)
  3. Merge results

Also fixes the argument mismatch: inventory_bp passed (tenant, master,
item_id) but the function only accepted 2 args.

pos/blueprints/inventory_bp.py

@@ -292,8 +292,37 @@ def create_item():
         except Exception as am_err:
             print(f"[auto_match] Error for item {item_id}: {am_err}")
 
+        # QWEN AI fitment (complementa TecDoc mientras se termina)
+        qwen_added = 0
+        try:
+            from services.qwen_fitment import get_vehicle_fitment
+            fitment = get_vehicle_fitment(
+                data['part_number'],
+                data['name'],
+                data.get('brand', '')
+            )
+            for v in fitment.get('vehicles', []):
+                if v.get('mye_id'):
+                    cur = conn.cursor()
+                    cur.execute("""
+                        INSERT INTO inventory_vehicle_compat
+                            (inventory_id, model_year_engine_id, source, confidence, created_at)
+                        VALUES (%s, %s, %s, %s, NOW())
+                        ON CONFLICT (inventory_id, model_year_engine_id) DO NOTHING
+                    """, (item_id, v['mye_id'], 'qwen_ai', fitment.get('confidence', 0)))
+                    cur.close()
+                    qwen_added += 1
+            conn.commit()
+        except Exception as qwen_err:
+            print(f"[qwen_fitment] Error for item {item_id}: {qwen_err}")
+
         conn.close()
-        return jsonify({'id': item_id, 'barcode': barcode, 'message': 'Item created'}), 201
+        return jsonify({
+            'id': item_id,
+            'barcode': barcode,
+            'message': 'Item created',
+            'vehicle_compatibilities_added': qwen_added,
+        }), 201
 
     except Exception as e:
         conn.rollback()

pos/services/inventory_vehicle_compat.py

@@ -231,36 +231,59 @@ def remove_all_compatibility(tenant_conn, inventory_id):
     return deleted
 
 
-def get_compatibility(tenant_conn, inventory_id):
+def get_compatibility(tenant_conn, master_conn, inventory_id):
-    """Get all MYE compatibilities for an inventory item."""
+    """Get all MYE compatibilities for an inventory item.
-    cur = tenant_conn.cursor()
+
-    cur.execute("""
+    Queries inventory_vehicle_compat from the tenant DB, then resolves
-        SELECT mye.id_mye, b.name_brand, m.name_model, y.year_car, e.name_engine,
+    vehicle details (brand/model/year/engine) from the master DB.
-               ivc.source, ivc.confidence, ivc.created_at
+    """
-        FROM inventory_vehicle_compat ivc
+    # 1. Get MYE IDs + metadata from tenant
-        JOIN model_year_engine mye ON mye.id_mye = ivc.model_year_engine_id
+    cur_t = tenant_conn.cursor()
+    cur_t.execute("""
+        SELECT model_year_engine_id, source, confidence, created_at
+        FROM inventory_vehicle_compat
+        WHERE inventory_id = %s
+        ORDER BY model_year_engine_id
+    """, (inventory_id,))
+    rows = cur_t.fetchall()
+    cur_t.close()
+
+    if not rows:
+        return []
+
+    mye_ids = [r[0] for r in rows]
+
+    # 2. Resolve vehicle details from master DB
+    cur_m = master_conn.cursor()
+    cur_m.execute("""
+        SELECT mye.id_mye, b.name_brand, m.name_model, y.year_car, e.name_engine
+        FROM model_year_engine mye
         JOIN models m ON m.id_model = mye.model_id
         JOIN brands b ON b.id_brand = m.brand_id
         JOIN years y ON y.id_year = mye.year_id
         JOIN engines e ON e.id_engine = mye.engine_id
-        WHERE ivc.inventory_id = %s
+        WHERE mye.id_mye = ANY(%s)
         ORDER BY b.name_brand, m.name_model, y.year_car
-    """, (inventory_id,))
+    """, (mye_ids,))
-    rows = cur.fetchall()
+    details = {r[0]: r for r in cur_m.fetchall()}
-    cur.close()
+    cur_m.close()
-    return [
+
-        {
+    # 3. Merge
-            'model_year_engine_id': r[0],
+    result = []
-            'brand': r[1],
+    for mye_id, source, confidence, created_at in rows:
-            'model': r[2],
+        d = details.get(mye_id)
-            'year': r[3],
+        if d:
-            'engine': r[4],
+            result.append({
-            'source': r[5],
+                'model_year_engine_id': mye_id,
-            'confidence': float(r[6]),
+                'brand': d[1],
-            'created_at': str(r[7]),
+                'model': d[2],
-        }
+                'year': d[3],
-        for r in rows
+                'engine': d[4],
-    ]
+                'source': source,
+                'confidence': float(confidence),
+                'created_at': str(created_at),
+            })
+    return result
 
 
 def search_mye(master_conn, brand_id=None, model_id=None, year_id=None, engine_id=None):