Enum ReferentialAction 

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

Referential actions for relations.

Variants

Cascade

Cascade the operation.

Restrict

Restrict the operation (error if references exist).

NoAction

No action (deferred check).

SetNull

Set to null.

SetDefault

Set to default value.

Implementations

impl ReferentialAction

pub fn from_str(s: &str) -> Option<ReferentialAction>

Parse from string.

pub fn as_str(&self) -> &'static str

Get the action name.

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<(), Error>

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for ReferentialAction

fn deserialize<__D>( __deserializer: __D, ) -> Result<ReferentialAction, <__D as Deserializer<'de>>::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

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 Serialize for ReferentialAction

fn serialize<__S>( &self, __serializer: __S, ) -> Result<<__S as Serializer>::Ok, <__S as Serializer>::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Copy for ReferentialAction

impl Eq for ReferentialAction

impl StructuralPartialEq for ReferentialAction