Constant ON_UPDATE 

pub const ON_UPDATE: ColumnMarker;

Specifies the ON UPDATE action for foreign key references.

Example

#[column(references = User::id, on_update = CASCADE)]
user_id: i32,

Supported Actions

• CASCADE: Update referencing rows when referenced row is updated
• SET_NULL: Set the column to NULL when referenced row is updated
• SET_DEFAULT: Set the column to its default value
• RESTRICT: Prevent update if referenced
• NO_ACTION: Similar to RESTRICT (default)

See: https://sqlite.org/foreignkeys.html#fk_actions