Struct RelationInclude 

pub struct RelationInclude<M: 'static, Rel: 'static, RelPK: 'static> {
    pub parent_fk_extract: fn(&M) -> Option<RelPK>,
    pub related_descriptor: &'static ModelDescriptor<Rel, RelPK>,
}

Typed handle for an .include(...) call on a query builder. Carries everything the runtime needs to issue the side-load query for a to-one relation: a function pointer that extracts the FK value from a parent row, and a static descriptor of the related model.

Built by the macro-emitted <model_module>::<relation_name>() accessor — see the .include(...) builder method on FindMany.

Scope (v1): to-one relations only, where the related target column is the related model’s primary key. Non-PK references and to-many relations are out of scope for this release; the macro silently omits accessors for non-PK references, and to-many relations stay on the existing list-side query path.

Fields

parent_fk_extract: fn(&M) -> Option<RelPK>

Extracts the FK value from a parent row. None ⇒ the parent’s FK column is null, so there’s no related row to load. Function pointers (not closures) by design: keep the type cheap to copy and ensure call sites can’t smuggle in captures that outlive the descriptor’s 'static.

related_descriptor: &'static ModelDescriptor<Rel, RelPK>

The related model’s descriptor. The runtime uses this to drive the side-load query (SELECT projection FROM related WHERE related.pk IN (...)) so the related-side read policy still applies.

Trait Implementations

impl<M, Rel, RelPK> Clone for RelationInclude<M, Rel, RelPK>

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<M, Rel, RelPK> Debug for RelationInclude<M, Rel, RelPK>

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

Formats the value using the given formatter.

impl<M, Rel, RelPK> Copy for RelationInclude<M, Rel, RelPK>