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Class: Mongoid::Association::EagerLoad::OtherDatabaseTargets Private

Relationships & Source Files
Super Chains via Extension / Inclusion / Inheritance
Class Chain:
self, PolymorphicTargets
Instance Chain:
self, PolymorphicTargets
Inherits: Mongoid::Association::EagerLoad::PolymorphicTargets
Defined in: lib/mongoid/association/eager_load/polymorphic_targets.rb

Overview

Targets kept in another database (or cluster), which a $lookup cannot reach. Each type is read directly through its own model, which connects with that model's client.

For { 'Scanner' => [ id2 ] } it runs, on the Scanner model's own client:

scanners.find('_id' => { '$in' => [ id2 ] })

Class Method Summary

PolymorphicTargets - Inherited

.for

Resolve every polymorphic target for the foreign keys grouped by type.
.new,
.in_root_database?

Whether the type's model shares the root's database (and client): exactly what a $lookup from the root collection can reach.

Instance Method Summary

PolymorphicTargets - Inherited

#fetch,
#indexed

The raw documents instantiated and indexed by their primary key.
#model_for, #primary_key

Constructor Details

This class inherits a constructor from Mongoid::Association::EagerLoad::PolymorphicTargets

Instance Method Details

#fetch ⇒ Hash

Returns:

  • (Hash) —

    The targets, as { type => { primary_key => document } }.

[ GitHub ] 

  


# File 'lib/mongoid/association/eager_load/polymorphic_targets.rb', line 141



def fetch
  @keys_by_type.to_h do |type, keys|
    model = model_for(type)
    documents = model.collection.find(primary_key => { '$in' => keys.uniq })
    [ type, indexed(documents, model) ]
  end
end