Struct ForeignKeyMeta 

pub struct ForeignKeyMeta {
    pub name: Option<Cow<'static, str>>,
    pub columns: Vec<Cow<'static, str>>,
    pub referenced_table: Cow<'static, str>,
    pub referenced_columns: Vec<Cow<'static, str>>,
    pub on_delete: Option<Cow<'static, str>>,
}

A foreign key declared on an entity.

Single-column keys are usually inferred from BelongsTo navigations or the scalar #[foreign_key(Target)] attribute; composite keys are declared via crate::model_builder::EntityTypeBuilder::has_foreign_key.

Fields

name: Option<Cow<'static, str>>

Explicit constraint name. None → derived from table + columns.

columns: Vec<Cow<'static, str>>

Dependent columns (on this entity’s table), in order.

referenced_table: Cow<'static, str>

Principal table name.

referenced_columns: Vec<Cow<'static, str>>

Principal columns, in order (same arity as columns).

on_delete: Option<Cow<'static, str>>

Optional ON DELETE SQL clause (e.g. "CASCADE").

Implementations

impl ForeignKeyMeta

pub fn derive_name(&self, table: &str) -> String

Derives the default constraint name for table.

Trait Implementations

impl Clone for ForeignKeyMeta

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ForeignKeyMeta

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

Formats the value using the given formatter.

impl Eq for ForeignKeyMeta

impl PartialEq for ForeignKeyMeta

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for ForeignKeyMeta