Struct FieldPrimitive 

pub struct FieldPrimitive {
    pub column: ColumnId,
    pub lowering: usize,
    pub field_mask: PathFieldSet,
    pub sub_projection: Projection,
    pub column_expr: Expr,
}

Maps a primitive field to its table column.

Examples

use toasty_core::schema::mapping::FieldPrimitive;

let prim: &FieldPrimitive = field.as_primitive().unwrap();
println!("stored in column {:?}, lowering index {}", prim.column, prim.lowering);

Fields

column: ColumnId

The table column that stores this field’s value.

lowering: usize

Index into Model::model_to_table for this field’s lowering expression.

The expression at this index converts the model field value to the column value during INSERT and UPDATE operations.

field_mask: PathFieldSet

Update coverage mask for this primitive field.

A singleton bitset containing the unique bit assigned to this primitive within the model’s field mask space. During update lowering, accumulated changed_mask bits are intersected with each field’s field_mask to determine which fields are affected by a partial update.

sub_projection: Projection

The projection from the root model field (the top-level embedded field containing this primitive) down to this primitive within the embedded type hierarchy. Identity for root-level primitives.

Used when building Returning::Changed expressions: we emit project(ref_self_field(root_field_id), sub_projection) so the existing lowering and constantization pipeline resolves it to the correct column value without needing to carry assignment expressions.

column_expr: Expr

Pre-computed table→model expression for this primitive — a column reference, possibly wrapped in a cast when the storage type differs from the primitive’s expression type.

Cached so that lowering can splice the loaded form Record([..]) for a #[deferred] primitive without re-deriving the column expression from the column id and schema.

Trait Implementations

impl Clone for FieldPrimitive

fn clone(&self) -> FieldPrimitive

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for FieldPrimitive

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

Formats the value using the given formatter.