Enum OptionalParent 

pub enum OptionalParent<T, Pk> {
    Absent,
    Template(T),
    Existing(Pk),
}

An optional parent reference — the template field behind a nullable foreign key.

The default is Absent: the column stays NULL, because a factory should never invent rows the schema does not require. A mod opts in with an existing row or a shaped template.

Variants

Absent

No parent; the FK column stays NULL.

Template(T)

Create the parent from this shaped template.

Existing(Pk)

Use this already-existing row’s key.

Trait Implementations

impl<T: Clone, Pk: Clone> Clone for OptionalParent<T, Pk>

fn clone(&self) -> OptionalParent<T, Pk>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<T: Debug, Pk: Debug> Debug for OptionalParent<T, Pk>

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

Formats the value using the given formatter.

impl<T, Pk> Default for OptionalParent<T, Pk>

fn default() -> Self

Returns the “default value” for a type.

impl<T: PartialEq, Pk: PartialEq> PartialEq for OptionalParent<T, Pk>

fn eq(&self, other: &OptionalParent<T, Pk>) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl<T: PartialEq, Pk: PartialEq> StructuralPartialEq for OptionalParent<T, Pk>