An instance variable should be used for flash[:notice]

The previous value of flash[:notice] will not be cleared automatically [Explanation]: The cause of the bug is a syntax error in the line that sets the value of the flash[:notice] message. The string literal "You have been logged out" is not properly enclosed in the surrounding string literal.

The string assigned to flash[:notice] will not be available until the next browser request.

This is an invalid syntax to use to assign value to flash[:notice]

The code generates a unique JWT for each user and stores it in the database for subsequent authentication.

The code verifies the authenticity of a JWT by checking the user's email and password against the decoded token.

The code authenticates a user based on their email and password, and upon successful authentication, generates a JWT containing the user's ID.

The code decodes a JWT using the Rails application secret key and renders the resulting user information in JSON format.

The code removes the description column from the existing products table.

The code updates the model file for the Product class to remove the description attribute.

The code migrates the database to the latest version, removing the description column from the products table if it exists.

The code creates a new migration file for removing the description column from the products table.

The code migrates the database to the latest version, adding the quantity column to the products table if it doesn't exist.

The code creates a new migration file for adding a quantity column to the products table.

The code adds a new column named quantity to the existing products table with a default value of 0.

The code updates the model file for the Product class to include a quantity attribute.

The code for creating a products table in the database.

The code migrates the database to the latest version, creating the products table if it doesn't exist.

The code defines the structure of the products table with columns for name, price, and timestamps.

The code generates a model file for the Product class, which is associated with the products table.

The code configures secure session cookies to prevent session hijacking.

The code enables strict HTTP headers to prevent clickjacking attacks.

The code encrypts sensitive information stored in the database to protect against unauthorized access.

The code enforces the use of HTTPS/SSL in the production environment to secure data transmission.

The code sanitizes user input to prevent SQL injection attacks when querying the Product model.

The code validates the presence of the name attribute to prevent the creation of products without a name.

The code validates the numericality of the price attribute to ensure that only positive prices are allowed.

The code encrypts sensitive data in the Product model to protect against data leaks or breaches.

The code generates a form that applies input sanitization, protecting against Cross-Site Scripting (XSS) attacks.

The code generates a form that uses session-based CSRF protection, preventing Cross-Site Request Forgery attacks.

The code generates a form that keeps the data on the client-side, reducing the risk of data interception during transit.

The code generates a form that encrypts the data before sending it over the network, ensuring secure transmission.

The code enforces authentication for all actions in the UsersController to mitigate unauthorized access.

The code enables Cross-Site Scripting (XSS) protection to prevent malicious script injection

The code enforces authorization for all actions in the UsersController to prevent privilege escalation.

The code enables Cross-Site Request Forgery (CSRF) protection to prevent unauthorized form submissions.