Enum ReferentialAction 

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

Foreign key referential action

Variants

NoAction

No action (default)

Restrict

Restrict deletion

Cascade

Cascade changes

SetNull

Set to NULL

SetDefault

Set to default value

Implementations

impl ReferentialAction

pub const fn as_sql(&self) -> &'static str

Get the SQL representation

pub fn from_sql(s: &str) -> Option<Self>

Parse from SQL string

Trait Implementations

impl Clone for ReferentialAction

fn clone(&self) -> ReferentialAction

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ReferentialAction

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

Formats the value using the given formatter.

impl Default for ReferentialAction

fn default() -> ReferentialAction

Returns the “default value” for a type.

impl Hash for ReferentialAction

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for ReferentialAction

fn eq(&self, other: &ReferentialAction) -> 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 Copy for ReferentialAction

impl Eq for ReferentialAction

impl StructuralPartialEq for ReferentialAction