How to design a secure MySQL table structure to implement user rights management functions?

How to design a secure MySQL table structure to implement user rights management functions?

In modern software systems, user rights management is a very important function. Through proper design and management, we can ensure the security of user data and prevent unauthorized users from accessing sensitive information. In this article, we will introduce how to design a secure MySQL table structure to implement user rights management functions and provide specific code examples.

1. User table
   First, we need to create a user table to store the user's basic information, such as user name, password, email, etc. When designing the user table, you need to note that the password field should be encrypted and stored using a hash function to increase the security of the user password.

CREATE TABLE users(
id INT PRIMARY KEY AUTO_INCREMENT,
username VARCHAR(50) NOT NULL,
password VARCHAR(255) NOT NULL,
email VARCHAR( 100) NOT NULL
);

2. Role table
   In order to achieve more fine-grained permission management, we can design a role table to define the user's role, such as administrator, ordinary user wait. Each role can be assigned different permissions. We can use a numeric field to represent the permission level of the role.

CREATE TABLE roles(
id INT PRIMARY KEY AUTO_INCREMENT,
name VARCHAR(50) NOT NULL,
level INT NOT NULL
);

3. User role association table
   Next, we need to create a user role association table to specify the roles owned by the user. A user can have multiple roles. Here, foreign keys are used to associate the primary keys of the user and role tables.

CREATE TABLE user_roles(
user_id INT,
role_id INT,
FOREIGN KEY (user_id) REFERENCES users(id),
FOREIGN KEY (role_id) REFERENCES roles( id)
);

4. Permission table
   Finally, we can create a permission table to define all operating permissions in the system. Each permission can be assigned to one role or multiple roles. We can use a numeric field to represent the level of permissions.

CREATE TABLE permissions(
id INT PRIMARY KEY AUTO_INCREMENT,
name VARCHAR(50) NOT NULL,
level INT NOT NULL
);

5. Role permissions association table
   Finally, we need to create a role permissions association table to specify the permissions owned by the role. A role can have multiple permissions.

CREATE TABLE role_permissions(
role_id INT,
permission_id INT,
FOREIGN KEY (role_id) REFERENCES roles(id),
FOREIGN KEY (permission_id) REFERENCES permissions( id)
);

Through the design of the above table structure, we can realize basic user rights management functions. When a user logs in to the system, we can impose corresponding operation restrictions based on the roles and permissions the user has. For example, if a certain operation requires the user to have administrator role permissions to perform, then we can check whether the current user's role and permissions meet the requirements.

The following is a specific code example that shows how to query a user's permissions in MySQL:

SELECT p.name
FROM users u
JOIN user_roles ur ON u. id = ur.user_id
JOIN roles r ON r.id = ur.role_id
JOIN role_permissions rp ON r.id = rp.role_id
JOIN permissions p ON p.id = rp.permission_id
WHERE u.username = 'admin';

The above is an introduction to how to design a secure MySQL table structure to implement user rights management functions. Through proper design and management, we can ensure the security of user data and prevent unauthorized users from accessing sensitive information. Hope this article helps you!

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