Enum sql_schema_describer::ForeignKeyAction

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

Foreign key action types (for ON DELETE|ON UPDATE).

Variants

NoAction

Produce an error indicating that the deletion or update would create a foreign key constraint violation. If the constraint is deferred, this error will be produced at constraint check time if there still exist any referencing rows. This is the default action.

Restrict

Produce an error indicating that the deletion or update would create a foreign key constraint violation. This is the same as NO ACTION except that the check is not deferrable.

Cascade

Delete any rows referencing the deleted row, or update the values of the referencing column(s) to the new values of the referenced columns, respectively.

SetNull

Set the referencing column(s) to null.

SetDefault

Set the referencing column(s) to their default values. (There must be a row in the referenced table matching the default values, if they are not null, or the operation will fail).

Implementations

impl ForeignKeyAction

pub fn is_cascade(&self) -> bool

Trait Implementations

impl Clone for ForeignKeyAction

fn clone(&self) -> ForeignKeyAction

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for ForeignKeyAction

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for ForeignKeyAction

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

Deserialize this value from the given Serde deserializer.

impl PartialEq for ForeignKeyAction

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

This method tests for self and other values to be equal, and is used by ==.

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

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

impl Serialize for ForeignKeyAction

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

Serialize this value into the given Serde serializer.

impl Copy for ForeignKeyAction

impl StructuralPartialEq for ForeignKeyAction