Enum EndpointCardinality 

pub enum EndpointCardinality {
    ZeroOrOne,
    ExactlyOne,
    ZeroOrMany,
    OneOrMany,
}

Crow’s feet notation endpoint cardinality

Defines the cardinality at one end of a relationship using standard crow’s feet notation symbols:

• ZeroOrOne: Optional single (0..1) - circle with single line
• ExactlyOne: Required single (1..1) - single line with perpendicular bar
• ZeroOrMany: Optional multiple (0..*) - circle with crow’s foot
• OneOrMany: Required multiple (1..*) - perpendicular bar with crow’s foot

Variants

ZeroOrOne

Zero or one (optional single) - 0..1

ExactlyOne

Exactly one (required single) - 1..1

ZeroOrMany

Zero or many (optional multiple) - 0..*

OneOrMany

One or many (required multiple) - 1..*

Trait Implementations

impl Clone for EndpointCardinality

fn clone(&self) -> EndpointCardinality

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for EndpointCardinality

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for EndpointCardinality

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for EndpointCardinality

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

Tests for self and other values to be equal, and is used by ==.

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

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

impl Serialize for EndpointCardinality

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 EndpointCardinality

impl Eq for EndpointCardinality

impl StructuralPartialEq for EndpointCardinality