Enum RelationKind 

#[non_exhaustive]
pub enum RelationKind {
    HasMany,
    HasOne,
    BelongsTo,
    BelongsToMany,
}

Available on crate features model-mysql or model-postgres or model-sqlite only.

What a Relation is.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

HasMany

The related table’s foreign key holds the owner’s primary key; any number of rows.

HasOne

As HasMany, at most one row (the one with the lowest key).

BelongsTo

The owner’s foreign key holds the related row’s primary key.

BelongsToMany

Through a join table holding both keys.

Trait Implementations

impl Clone for RelationKind

fn clone(&self) -> RelationKind

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for RelationKind

impl Debug for RelationKind

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

Formats the value using the given formatter.

impl Eq for RelationKind

impl Hash for RelationKind

fn hash<__H>(&self, state: &mut __H)

where __H: Hasher,

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 RelationKind

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for RelationKind