Schema Classes

Schema classes define the column structure of your models. In Nimbus, your model struct is the schema — you define columns as struct fields with GORM tags for type, constraints, and JSON serialization.

Struct as schema

GORM infers column names from field names (snake_case by default). Use struct tags to override:

type User struct {
    database.Model
    Name      string `gorm:"size:255"`
    Email     string `gorm:"uniqueIndex;not null"`
    Password  string `gorm:"-"`  // ignore in DB
    Role      string `gorm:"default:user"`
}

Common GORM tags

Tag	Description
`primaryKey`	Primary key
`uniqueIndex`	Unique constraint
`not null`	NOT NULL
`default:value`	Default value
`size:255`	Column size
`column:db_name`	Override column name
`-`	Ignore field

JSON serialization

Use json:"-" to hide sensitive fields from JSON output:

Password string `json:"-"`  // omit from JSON