How do you design the database structure for your application?

When designing a database structure for a Go application, the following steps are important:

1. Requirements analysis — understand what data needs to be stored, how they are related, and what operations will be performed.

2. Defining entities and relationships — identify main objects (tables) and relationships between them (one-to-one, one-to-many, many-to-many).

3. Normalization — eliminate data redundancy to avoid anomalies during updates.

4. Choosing the database type — relational (PostgreSQL, MySQL) or NoSQL (MongoDB), depending on requirements.

5. Defining table schemas — fields, data types, constraints (PRIMARY KEY, FOREIGN KEY, NOT NULL).

6. Indexing — to speed up queries.

7. Designing migrations — to manage schema changes.

In Go, ORM or libraries like GORM or sqlx are commonly used to work with databases, helping to link data structures with tables.

Example of defining a model structure with GORM:

type User struct {
    ID        uint   `gorm:"primaryKey"`
    Name      string
    Email     string `gorm:"uniqueIndex"`
    CreatedAt time.Time
}

This approach helps maintain the database structure in code and simplifies migrations.