Enum FkAction 

pub enum FkAction {
    Restrict,
    Cascade,
    SetNull,
    SetDefault,
    NoAction,
}

v7.6.0 — Referential action for ON DELETE / ON UPDATE.

Variants

Restrict

Reject the parent mutation if any child row references it. SQL spec default; SPG default when no clause is given.

Cascade

Recursively propagate the parent’s delete / update to the child rows. Same TX.

SetNull

Set the child FK column(s) to NULL. Requires the FK columns to be NULL-able.

SetDefault

Set the child FK column(s) to their declared DEFAULT. Requires the child column(s) to have DEFAULT.

NoAction

SQL spec NO ACTION (deferred check). SPG treats this as Restrict because the single-writer model has no deferred constraint window; the keyword is accepted for compatibility.

Trait Implementations

impl Clone for FkAction

fn clone(&self) -> FkAction

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for FkAction

impl Debug for FkAction

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

Formats the value using the given formatter.

impl Display for FkAction

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

Formats the value using the given formatter.

impl Eq for FkAction

impl PartialEq for FkAction

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for FkAction