Enum Cardinality 

pub enum Cardinality {
    O2M {
        constraint: String,
        columns: Vec<(String, String)>,
    },
    M2O {
        constraint: String,
        columns: Vec<(String, String)>,
    },
    O2O {
        constraint: String,
        columns: Vec<(String, String)>,
        is_parent: bool,
    },
    M2M(Junction),
}

Relationship cardinality.

Variants

O2M

One-to-Many: parent has many children

Fields

constraint: String

columns: Vec<(String, String)>

M2O

Many-to-One: child has one parent

Fields

constraint: String

columns: Vec<(String, String)>

O2O

One-to-One

Fields

constraint: String

columns: Vec<(String, String)>

is_parent: bool

Whether this table is the parent in the relationship

M2M(Junction)

Many-to-Many (via junction table)

Implementations

impl Cardinality

pub fn columns(&self) -> Vec<(String, String)>

Get the join columns.

pub fn constraint_name(&self) -> &str

Get the constraint name.

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.

impl<'de> Deserialize<'de> for Cardinality

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for Cardinality

fn eq(&self, other: &Cardinality) -> 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 Cardinality

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for Cardinality