Enum ReferentialAction 

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

Referential action for foreign key constraints (ON DELETE / ON UPDATE).

These define what happens to referencing rows when the referenced row is deleted or updated.

Variants

NoAction

No action - raise error if any references exist. This is the default and most restrictive option.

Restrict

Restrict - same as NO ACTION (alias for compatibility).

Cascade

Cascade - automatically delete/update referencing rows.

SetNull

Set null - set referencing columns to NULL.

SetDefault

Set default - set referencing columns to their default values.

Implementations

impl ReferentialAction

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

Get the SQL representation of this action.

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

Parse a referential action from a string (case-insensitive).

Returns None if the string is not a recognized action.

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 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