Enum OnDelete 

pub enum OnDelete {
    Cascade,
    Protect,
    SetNull,
    SetDefault,
    DoNothing,
}

What happens to rows referencing a deleted row (Django on_delete).

Variants

Cascade

Delete referencing rows too.

Protect

Refuse the delete while references exist.

SetNull

Set the reference to NULL (field must be nullable).

SetDefault

Set the reference to the column default.

DoNothing

Leave referencing rows untouched (the database may still enforce).

Trait Implementations

impl Clone for OnDelete

fn clone(&self) -> OnDelete

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for OnDelete

impl Debug for OnDelete

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

Formats the value using the given formatter.

impl Default for OnDelete

fn default() -> OnDelete

Returns the “default value” for a type.

impl Eq for OnDelete

impl PartialEq for OnDelete

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for OnDelete