Struct RelationHop 

pub struct RelationHop {
    pub parent_table: &'static str,
    pub parent_column: &'static str,
    pub related_table: &'static str,
    pub related_column: &'static str,
    pub quantifier: RelationQuantifier,
    pub scope: RelatedReadScope,
}

One traversed relation edge: the FK linkage, how the related rows are quantified (ToOne for a plain to-one hop, Some/Every/None for a to-many hop under a quantifier), and the related model’s read scope, which every backend that enforces policy applies inside the subquery this hop renders to (GHSA-p55v-6xv5-93p3).

Fields

parent_table: &'static str

parent_column: &'static str

related_table: &'static str

related_column: &'static str

quantifier: RelationQuantifier

scope: RelatedReadScope

Required, never defaulted: see RelatedReadScope.

Implementations

impl RelationHop

pub const fn new( parent_table: &'static str, parent_column: &'static str, related_table: &'static str, related_column: &'static str, quantifier: RelationQuantifier, scope: RelatedReadScope, ) -> RelationHop

pub const fn with_quantifier( self, quantifier: RelationQuantifier, ) -> RelationHop

Same linkage, re-quantified. Used when a to-many hop is recorded before the caller has picked some/every/none.

pub fn is_self_relation(&self) -> bool

Whether the related table is the parent table (User.manager). The subquery’s own FROM then shadows the parent’s name, so backends must correlate through a derived table instead of related.col = parent.col, which would compare the inner row with itself.

Trait Implementations

impl Clone for RelationHop

fn clone(&self) -> RelationHop

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for RelationHop

impl Debug for RelationHop

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

Formats the value using the given formatter.

impl Eq for RelationHop

impl PartialEq for RelationHop

fn eq(&self, other: &RelationHop) -> bool

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for RelationHop