Worked on the out of date method a bit. All the checking logic is in place. But it adds a new record instead of updating the existing record.

main.py

@@ -170,13 +170,15 @@ def upgrade():
 
 @app.route('/ood/', methods=['GET'])
 def ood():
+
+    added = []
+
     url = []
     base = []
     name = []
     y = 0
     z = 0
 
-    mangaName = manga.query().all()
 
     with open(PATH + "/tach.json", "r") as tf:
         # with open("tach.json", "r") as tf:
@@ -190,6 +192,22 @@ def ood():
             base.append(data["mangas"][y]["manga"][2])
             y = y + 1
 
+        for each in name:
+            # print('start')
+            if manga.query.filter_by(name=name[z]).first():
+                result = manga.query.filter_by(name=name[z]).first()
+                if result.url != url[z]:
+                    new_manga={}
+                    # print('----' + name[z])
+                    # print(url[z])
+                    # print(result.url)
+                    query = manga(name=name[z], url=url[z], url_flag=str(base[z]), view_format=0, unknown_value=0)
+                    new_manga['title'] = name[z]
+                    added.append(new_manga)
+                    db.session.add(query)
+            z = z + 1
+            db.session.commit()
+    return jsonify(updated=added)
 
 @app.route('/test/', methods=['GET'])
 def test():