Struct AddRelation 

pub struct AddRelation {
    pub from: String,
    pub kind: RelationKind,
    pub to: String,
    pub via: String,
    pub required: bool,
    pub on_delete: OnDelete,
}

Fields

from: String

kind: RelationKind

to: String

via: String

Column or accessor name. For belongs_to, the FK column (e.g. user_id). For has_many, the reverse accessor name on the parent side (e.g. posts).

required: bool

true → NOT NULL FK column, requires a parent row to exist before the child row can be inserted. false (default) → nullable, safe to add to a table with existing rows.

0.9.0 default is false because upgrading a 0.8.0 project must not break on pre-existing rows that pointed at id 0.

on_delete: OnDelete

The SQL ON DELETE action when the referenced parent row is removed. Default is Restrict: the parent row cannot be deleted while any child references it. Cascade deletes the children. SetNull nulls the FK on children (only valid when the column is nullable — the executor will reject a SetNull + required combination).

Trait Implementations

impl Clone for AddRelation

fn clone(&self) -> AddRelation

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for AddRelation

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for AddRelation

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for AddRelation

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

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 AddRelation