Relation (trait)

Overview:

Relation defines relationships between Model classes and adds lazy-loading accessors.

Use the Relation trait to declare one-to-one and one-to-many links between models and access related data lazily.

Key behavior:

• Relations are defined via hasOne and hasMany.
• Accessing $model->relationName triggers a query.

Public API:

• ::hasOne($modelName, $extra = []) defines a one-to-one relation.
• ::hasMany($modelName, $extra = []) defines a one-to-many relation.

Example:

class Post extends Model { public $id; }
class Comment extends Model { public $post_id; }
Post::hasMany('Comment.post_id');