NAME

Mandel::Relationship::HasOne - A field relates to another mongodb document

DESCRIPTION

Mandel::Relationship::HasOne is a class used to describe the relationship between one document that has a relationship to one other documents. The connection between the documents is described in the database using DBRef.

DATABASE STRUCTURE

A "dinosaur" that has one "cat" will look like this in the database:

  mongodb# db.dinosaurs.find({ })
  { "_id" : ObjectId("5352b4d8c5483e4502010000") }

  mongodb# db.cats.find({ "dinosaur.$id": ObjectId("53529f28c5483e4977020000") })
  {
    "_id" : ObjectId("5352b4d8c5483e4502040000"),
    "dinosaur" : DBRef("dinosaurs", ObjectId("5352b4d8c5483e4502010000"))
  }

SYNOPSIS

Using DSL

  package MyModel::Dinosaur;
  use Mandel::Document;
  has_one cat => 'MyModel::Cat';

Using object oriented interface

  MyModel::Dinosaur->model->relationship(
    "has_one",
    "cat",
    "MyModel::Cat",
  );

Methods generated

  $cat = MyModel::Dinosaur->new->cat(\%args, $cb);
  $cat = MyModel::Dinosaur->new->cat($person_obj, $cb);

  $person_obj = MyModel::Dinosaur->new->cat(\%args);
  $person_obj = MyModel::Dinosaur->new->cat($person_obj);

  $person = MyModel::Dinosaur->new->cat;
  $self = MyModel::Dinosaur->new->cat(sub { my($self, $err, $person) = @_; });

See also "relationship" in Mandel::Model.

METHODS

monkey_patch

Add methods to "document_class" in Mandel::Relationship.

SEE ALSO

Mojolicious, Mango, Mandel::Relationship

AUTHOR

Jan Henning Thorsen - jhthorsen@cpan.org