Enum Cardinality 

pub enum Cardinality {
    Many {
        singular: Name,
    },
    One,
}

Cardinality for a relation field that reaches another model.

Variants

Many

The relation yields zero or more associated items.

Fields

singular: Name

The singular name for one associated item (used in generated method names).

One

The relation yields at most one associated item.

Implementations

impl Cardinality

pub fn is_many(&self) -> bool

Returns true when this relation yields zero or more items.

pub fn is_one(&self) -> bool

Returns true when this relation yields at most one item.

pub fn singular(&self) -> Option<&Name>

Returns the singular item name for a one-to-many relation.

Trait Implementations

impl Clone for Cardinality

fn clone(&self) -> Cardinality

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Cardinality

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

Formats the value using the given formatter.