vapor-docs/3.0/docs/fluent/postgresql/schema-builder.md

PostgreSQL Schema Builder

Fluent lets you customize your schemas with PostgreSQL-specific column types. You can even set default values. Let's take a look at creating a simple Planet model with custom PostgreSQL field tpyes.

/// Type of planet.
enum PlanetType: String, Codable, CaseIterable, ReflectionDecodable {
    case smallRocky
    case gasGiant
    case dwarf
}

/// Represents a planet.
struct Planet: PostgreSQLModel, PostgreSQLMigration {
	/// Unique identifier.
    var id: Int?

    /// Name of the planet.
    let name: String

    /// Planet's specific type.
    let type: PlanetType
}

The above model looks great, but there are a couple of problems with the automatically generated migration:

• name uses a TEXT column, but we want to use VARCHAR(64).
• type is defaulting to a JSONB column, but we want to store it as ENUM().