Solution #950
Solution #950
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| user = models.ForeignKey(to="User", | ||
| on_delete=models.CASCADE, | ||
| null=True, | ||
| blank=True, |
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i think null and blank dont need here
db/models.py
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| class Order(models.Model): | ||
| created_at = models.DateTimeField(auto_now_add=True) | ||
| user = models.ForeignKey(to="User", |
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the lecture says it's better to access the settings here. (settings.AUTH_USER_MODEL) not to="User"
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Thank you for your hard work on this project! 😊 While your implementation is mostly correct, there are a few critical issues that need to be addressed before we can proceed:
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Exception Handling: There are multiple instances where exceptions like
DoesNotExistare not handled. It's important to handle these exceptions to ensure smooth operation and provide user-friendly error messages. This applies to functions likeget_user,create_order, anddelete_movie_session_by_id. -
Use of
Userinstead ofget_user_model(): Inservices/order.py, it's best practice to useget_user_model()instead of directly referencingUser. This ensures compatibility with custom user models. -
Transaction Decorator: Consider using the
@transaction.atomicdecorator for better readability and to ensure that the entire function executes within a single transaction context. -
Type Annotations: Improve code clarity by specifying the type of
QuerySetreturned in functions likeget_orders. -
Typo: There's a typo in the
get_taken_seatsfunction (tiketshould beticket). Correcting this will prevent potential errors. -
Nullable
userField inOrderModel: The change to allownullandblankvalues for theuserfield in theOrdermodel is significant. Ensure this aligns with your application's logic and requirements.
Please address these issues to ensure the code fully meets the task requirements and constraints. Once these are resolved, your code will be in great shape! Keep up the great work! 🚀
✨ Please rate this review in the Platform's notification center. I will be grateful for your feedback! ✨
🔄 Fix the issues, commit the changes, and then re-request my review using the Re-request review button in the Reviewers tab.
| migrations.CreateModel( | ||
| name='User', | ||
| fields=[ | ||
| ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')), | ||
| ('password', models.CharField(max_length=128, verbose_name='password')), | ||
| ('last_login', models.DateTimeField(blank=True, null=True, verbose_name='last login')), | ||
| ('is_superuser', models.BooleanField(default=False, help_text='Designates that this user has all permissions without explicitly assigning them.', verbose_name='superuser status')), | ||
| ('username', models.CharField(error_messages={'unique': 'A user with that username already exists.'}, help_text='Required. 150 characters or fewer. Letters, digits and @/./+/-/_ only.', max_length=150, unique=True, validators=[django.contrib.auth.validators.UnicodeUsernameValidator()], verbose_name='username')), | ||
| ('first_name', models.CharField(blank=True, max_length=150, verbose_name='first name')), | ||
| ('last_name', models.CharField(blank=True, max_length=150, verbose_name='last name')), | ||
| ('email', models.EmailField(blank=True, max_length=254, verbose_name='email address')), | ||
| ('is_staff', models.BooleanField(default=False, help_text='Designates whether the user can log into this admin site.', verbose_name='staff status')), | ||
| ('is_active', models.BooleanField(default=True, help_text='Designates whether this user should be treated as active. Unselect this instead of deleting accounts.', verbose_name='active')), | ||
| ('date_joined', models.DateTimeField(default=django.utils.timezone.now, verbose_name='date joined')), | ||
| ('groups', models.ManyToManyField(blank=True, help_text='The groups this user belongs to. A user will get all permissions granted to each of their groups.', related_name='user_set', related_query_name='user', to='auth.Group', verbose_name='groups')), | ||
| ('user_permissions', models.ManyToManyField(blank=True, help_text='Specific permissions for this user.', related_name='user_set', related_query_name='user', to='auth.Permission', verbose_name='user permissions')), | ||
| ], | ||
| options={ | ||
| 'verbose_name': 'user', | ||
| 'verbose_name_plural': 'users', | ||
| 'abstract': False, | ||
| }, | ||
| managers=[ | ||
| ('objects', django.contrib.auth.models.UserManager()), | ||
| ], | ||
| ), |
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The User model is being created here, but it seems to duplicate the default Django User model. If you intend to extend the default User model, consider using a custom user model by extending AbstractUser or AbstractBaseUser instead of creating a new model from scratch.
| ('created_at', models.DateTimeField(auto_now_add=True)), | ||
| ('user', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='orders', to=settings.AUTH_USER_MODEL)), |
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The Order model references settings.AUTH_USER_MODEL for the user field, which is correct. Ensure that AUTH_USER_MODEL is set to the correct user model in your settings if you are using a custom user model.
| ('movie_session', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='db.moviesession')), | ||
| ('order', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='db.order')), |
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The Ticket model has a foreign key to Order. Ensure that the Order model is correctly defined and migrated before this migration is applied to avoid any dependency issues.
| migrations.AddConstraint( | ||
| model_name='ticket', | ||
| constraint=models.UniqueConstraint(fields=('row', 'seat', 'movie_session'), name='unique_ticket'), |
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The unique constraint on the Ticket model ensures that each combination of row, seat, and movie_session is unique. This is a good practice to prevent duplicate tickets for the same seat in a session.
| name='user', | ||
| field=models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.CASCADE, related_name='orders', to=settings.AUTH_USER_MODEL), |
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The user field in the Order model is now nullable and can be left blank. This means an Order can exist without being associated with a User. Ensure this change is intentional and that your application logic can handle orders without users.
services/order.py
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| raise Exception("No tickets to create") | ||
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| with transaction.atomic(): | ||
| user = User.objects.get(username=username) |
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The User.objects.get(username=username) call can raise a DoesNotExist exception if the user is not found. Consider handling this exception to provide a more user-friendly error message.
services/order.py
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| except ValidationError as e: | ||
| raise ValueError(f"Invalid ticket data: {e}") |
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Raising a ValueError with a custom message is a good practice here, as it provides clear feedback about the validation error. Ensure that this exception is handled appropriately where the create_order function is called.
services/order.py
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| def get_orders(username: str = None) -> list: | ||
| if username: | ||
| user = User.objects.get(username=username) |
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Similar to the create_order function, User.objects.get(username=username) can raise a DoesNotExist exception. Consider handling this exception to ensure smooth operation when the user is not found.
services/user.py
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| def get_user(user_id: int) -> User: | ||
| return User.objects.get(pk=user_id) |
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The get_user function uses User.objects.get(), which will raise a DoesNotExist exception if no user is found with the given ID. Consider handling this exception or documenting that this function may raise an exception if the user is not found.
services/user.py
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| except ObjectDoesNotExist: | ||
| raise ObjectDoesNotExist(f"User with id {user_id} does not exist.") |
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Raising ObjectDoesNotExist in the update_user function is redundant since this exception is already raised by User.objects.get(). Consider raising a more specific exception or handling it differently to provide clearer feedback.
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Thank you for your hard work on this Pull Request! 🎉 While the decision is to APPROVE to help you move forward with your learning journey, there are several critical issues that need to be addressed to ensure your code aligns with best practices and application requirements:
-
User Model Creation: Avoid creating a custom
Usermodel directly in the migration file. Instead, define it inmodels.pyand create migrations to ensure better maintainability and integration with Django's authentication system. -
Order Model's User Field: The
userfield in theOrdermodel allowsnullandblankvalues and useson_delete=CASCADE. Ensure these behaviors align with your application's logic, as they allow orders to exist without an associated user and delete all related orders if a user is deleted. -
Exception Handling: Use
User.DoesNotExistinstead ofObjectDoesNotExistfor clarity and specificity in exception handling. Also, ensure that exceptions are handled in a way that aligns with your application's error handling strategy. -
Type Annotations: Update the type annotations for
genres_idsandactors_idstolist[int]for consistency and clarity. Also, ensure the return type ofget_ordersis annotated asQuerySetinstead oflist. -
Use of
get_user_model(): It's best practice to useget_user_model()instead of directly referencingUserto ensure compatibility with custom user models. -
Import Statement: Ensure the import statement for
AUTH_USER_MODELisfrom django.conf import settingsfor compatibility with Django's settings.
Please review these comments and make the necessary improvements to enhance your code. Keep up the great work, and continue learning from these experiences! 🚀
✨ Please rate this review in the Platform's notification center. I will be grateful for your feedback! ✨
| migrations.CreateModel( | ||
| name='User', | ||
| fields=[ | ||
| ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')), | ||
| ('password', models.CharField(max_length=128, verbose_name='password')), | ||
| ('last_login', models.DateTimeField(blank=True, null=True, verbose_name='last login')), | ||
| ('is_superuser', models.BooleanField(default=False, help_text='Designates that this user has all permissions without explicitly assigning them.', verbose_name='superuser status')), | ||
| ('username', models.CharField(error_messages={'unique': 'A user with that username already exists.'}, help_text='Required. 150 characters or fewer. Letters, digits and @/./+/-/_ only.', max_length=150, unique=True, validators=[django.contrib.auth.validators.UnicodeUsernameValidator()], verbose_name='username')), | ||
| ('first_name', models.CharField(blank=True, max_length=150, verbose_name='first name')), | ||
| ('last_name', models.CharField(blank=True, max_length=150, verbose_name='last name')), | ||
| ('email', models.EmailField(blank=True, max_length=254, verbose_name='email address')), | ||
| ('is_staff', models.BooleanField(default=False, help_text='Designates whether the user can log into this admin site.', verbose_name='staff status')), | ||
| ('is_active', models.BooleanField(default=True, help_text='Designates whether this user should be treated as active. Unselect this instead of deleting accounts.', verbose_name='active')), | ||
| ('date_joined', models.DateTimeField(default=django.utils.timezone.now, verbose_name='date joined')), | ||
| ('groups', models.ManyToManyField(blank=True, help_text='The groups this user belongs to. A user will get all permissions granted to each of their groups.', related_name='user_set', related_query_name='user', to='auth.Group', verbose_name='groups')), | ||
| ('user_permissions', models.ManyToManyField(blank=True, help_text='Specific permissions for this user.', related_name='user_set', related_query_name='user', to='auth.Permission', verbose_name='user permissions')), | ||
| ], | ||
| options={ | ||
| 'verbose_name': 'user', | ||
| 'verbose_name_plural': 'users', | ||
| 'abstract': False, | ||
| }, | ||
| managers=[ | ||
| ('objects', django.contrib.auth.models.UserManager()), | ||
| ], | ||
| ), |
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Creating a custom User model directly in the migration file is not recommended. Define the model in models.py and then create migrations. This ensures better maintainability and integration with Django's authentication system.
| ('created_at', models.DateTimeField(auto_now_add=True)), | ||
| ('user', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='orders', to=settings.AUTH_USER_MODEL)), |
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The user field in the Order model uses on_delete=CASCADE. Ensure this behavior aligns with your application's logic, as deleting a user will also delete all related orders.
| name='user', | ||
| field=models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.CASCADE, related_name='orders', to=settings.AUTH_USER_MODEL), |
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The user field in the Order model is now set to allow null and blank values. Ensure this change aligns with your application's logic, as it allows orders to exist without an associated user.
db/models.py
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| from django.core.exceptions import ValidationError | ||
| from django.db.models import UniqueConstraint | ||
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| from settings import AUTH_USER_MODEL |
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The import statement for AUTH_USER_MODEL should be from django.conf import settings instead of from settings import AUTH_USER_MODEL. This ensures compatibility with Django's settings.
db/models.py
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| user = models.ForeignKey(AUTH_USER_MODEL, | ||
| on_delete=models.CASCADE, | ||
| null=True, | ||
| blank=True, | ||
| related_name="orders") |
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The user field in the Order model allows null and blank values. Ensure this behavior is intentional and aligns with your application's logic, as it allows orders to exist without an associated user.
| with transaction.atomic(): | ||
| try: | ||
| user = User.objects.get(username=username) | ||
| except ObjectDoesNotExist: |
There was a problem hiding this comment.
Consider using User.DoesNotExist instead of ObjectDoesNotExist for clarity and specificity in exception handling.
| if username: | ||
| try: | ||
| user = User.objects.get(username=username) | ||
| except ObjectDoesNotExist: |
There was a problem hiding this comment.
Consider using User.DoesNotExist instead of ObjectDoesNotExist for clarity and specificity in exception handling.
| return order | ||
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| def get_orders(username: str = None) -> list: |
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The return type of get_orders should be annotated as QuerySet instead of list for accuracy.
| def get_user(user_id: int) -> User: | ||
| try: | ||
| return User.objects.get(pk=user_id) | ||
| except ObjectDoesNotExist: |
There was a problem hiding this comment.
Consider using User.DoesNotExist instead of ObjectDoesNotExist for clarity and specificity in exception handling.
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| user.save() | ||
| return user | ||
| except ObjectDoesNotExist: |
There was a problem hiding this comment.
Consider using User.DoesNotExist instead of ObjectDoesNotExist for clarity and specificity in exception handling.
db/models.py
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| from django.core.exceptions import ValidationError | ||
| from django.db.models import UniqueConstraint | ||
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| from settings import AUTH_USER_MODEL |
services/order.py
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| with transaction.atomic(): | ||
| try: | ||
| user = User.objects.get(username=username) |
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Use get_user_model(), not User
services/order.py
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| for ticket in create_tickets: | ||
| try: | ||
| ticket.full_clean() | ||
| except ValidationError as e: | ||
| raise ValueError(f"Invalid ticket data: {e}") |
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You already have validation on model level for this. Read how save method works in models
| user = User.objects.get(pk=user_id) | ||
| if username: |
| with transaction.atomic(): | ||
| try: | ||
| user = User.objects.get(username=username) | ||
| except ObjectDoesNotExist: |
| print(f"Movie session with id {session_id} does not exist.") | ||
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| def get_taken_seats(movie_session_id: int) -> list: |
| if username: | ||
| try: | ||
| user = User.objects.get(username=username) | ||
| except ObjectDoesNotExist: |
| return order | ||
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| def get_orders(username: str = None) -> list: |
| def get_user(user_id: int) -> User: | ||
| try: | ||
| return User.objects.get(pk=user_id) | ||
| except ObjectDoesNotExist: |
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| user.save() | ||
| return user | ||
| except ObjectDoesNotExist: |
| "db", | ||
| "django.contrib.auth", | ||
| "django.contrib.contenttypes", |
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db should be the last one in the list
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