Доавлен универсальный хендлер ошибок и восстановлена работа при логине несуществующего пользователя

__init__.py

@@ -4,6 +4,7 @@ from flask_login import LoginManager, login_user, login_required, logout_user
 from db_routing import app, db
 import os
 import hashlib
+from re import match
 
 login_manager = LoginManager(app)
 
@@ -23,9 +24,10 @@ def register():
     if request.method == 'POST':
         userName = request.form['RegUserLogin']
         userPassw = request.form['RegUserPassw']
-        if db_routing.add_user(userName, passw_hash(userPassw)):
+        if string_check(userName) and string_check(userPassw):
-            login_user(db_routing.find_user(username=userName))
+            if db_routing.add_user(userName, passw_hash(userPassw)):
-            return redirect(url_for('workshop'))
+                login_user(db_routing.find_user(username=userName))
+                return redirect(url_for('workshop'))
     return render_template('registration.html')
 
 
@@ -33,10 +35,16 @@ def register():
 def login():
     userName = request.form['LogUserLogin']
     userPassw = request.form['LogUserPassw']
-    user = verify_password(userName, userPassw)
+    if string_check(userName) and string_check(userPassw):
-    if user:
+        user = verify_password(userName, userPassw)
-        login_user(user)
+        if user:
-        return redirect(url_for('workshop'))
+            login_user(user)
+            return redirect(url_for('workshop'))
+        else:
+            return redirect(url_for('register'))
+
+    else:
+        return redirect(url_for('register'))
 
 
 @app.route('/logout')
@@ -51,11 +59,22 @@ def workshop():
     return render_template('workshop.html')
 
 
-@app.errorhandler(404)
+@app.errorhandler(Exception)
-def not_found(error):
+def universal_error(error):
     return render_template('error.html'), 404
 
 
+def string_check(string):
+    if 2 < len(string) < 7:
+        if match('^[0-9A-Za-z]*$', string) and not ('\\' in string):
+            return True
+    else:
+        print(
+            'Некорректный ввод! Строка должно включать только английские буквы или цифры. Содержать не менее 3 и не '
+            'более 6 символов')
+        return False
+
+
 def passw_hash(user_passw, salt=os.urandom(32)):
     key = hashlib.pbkdf2_hmac('sha256', user_passw.encode('utf-8'), salt, 100000)
     storage = salt + key
@@ -66,6 +85,7 @@ def passw_hash(user_passw, salt=os.urandom(32)):
 
 def verify_password(username, password):
     User = db_routing.find_user(username=username)
+    print(User)
     if User:
         userSalt = User.password[:32]
         if passw_hash(password, userSalt) == User.password:

db_routing.py

@@ -14,7 +14,6 @@ class User(db.Model):
     username = db.Column(db.String(80), unique=True, nullable=False)
     password = db.Column(db.String(120), nullable=False)
 
-
     def __init__(self, username, password):
         self.username = username
         self.password = password
@@ -49,7 +48,7 @@ class Scenario(db.Model):
     owner_id = db.Column(db.Integer, ForeignKey('Users.id'))
     trigger_id = db.Column(db.Integer, ForeignKey('Triggers.id'))
     trigger_args = db.Column(db.String(200))
-    action_id = db.Column(db.Integer, ForeignKey('Action.id'))
+    action_id = db.Column(db.Integer, ForeignKey('Actions.id'))
     action_args = db.Column(db.String(200))
 
 
@@ -70,4 +69,5 @@ def find_user(id=None, username=None):
     if username:
         return User.query.filter_by(username=username).first()
 
-#def get_trigers():
+
+# def get_trigers():