Enum ReferentialAction 

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

A foreign key’s referential action — SQL’s own five words, no synonyms.

Lives here (rather than in the table model) so a dialect can answer DdlRenderer::supports_foreign_key_action about a specific action without depending on the modeling crate.

Variants

Cascade

Also delete or update the referencing rows

SetNull

Set the referencing columns to NULL

Restrict

Reject the delete or update; some engines defer the check

NoAction

Reject the delete or update (the SQL default)

SetDefault

Set the referencing columns to their default values

Implementations

impl ReferentialAction

pub fn from_sql_word(word: &str) -> Result<Self, String>

Parses the SQL words, case-insensitively; underscores read as spaces so set_null and SET NULL both land.

Errors

Returns a plain message listing the valid words when the input is not one of them.

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 Copy for ReferentialAction

impl Debug for ReferentialAction

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

Formats the value using the given formatter.

impl Display for ReferentialAction

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

Formats the value using the given formatter.

impl Eq for ReferentialAction

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for ReferentialAction