Struct FieldEnum 

pub struct FieldEnum {
    pub discriminant: FieldPrimitive,
    pub variants: Vec<EnumVariant>,
    pub field_mask: PathFieldSet,
    pub sub_projection: Projection,
    pub default_returning: Expr,
}

Maps an embedded enum field to its discriminant column and per-variant data columns.

The discriminant column stores the active variant’s discriminant (integer or string). Each data variant additionally has nullable columns for its fields; unit variants have no extra columns (all variant-field columns are NULL for them).

Examples

use toasty_core::schema::mapping::FieldEnum;

let e: &FieldEnum = field.as_enum().unwrap();
println!("discriminant column: {:?}", e.discriminant.column);
println!("{} variants", e.variants.len());

Fields

discriminant: FieldPrimitive

Mapping for the discriminant column.

variants: Vec<EnumVariant>

Per-variant mappings, in the same order as app::EmbeddedEnum::variants.

field_mask: PathFieldSet

Update coverage mask for the enum field (singleton: the whole enum changes atomically).

sub_projection: Projection

Sub-projection from the root model field to this enum field.

default_returning: Expr

Pre-computed default expression for this embedded enum.

For unit-only enums this is the discriminant column reference. For data-carrying enums it is the full Match { disc, arms[], else } expression with per-arm records (currently identical to the raw table_to_model shape — #[deferred] on a variant field is rejected at the macro layer; if it is ever lifted, the per-arm records would mask their deferred fields here).

Trait Implementations

impl Clone for FieldEnum

fn clone(&self) -> FieldEnum

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for FieldEnum

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.