Module: ROM::Plugins::Relation::SQL::AutoCombine::InstanceInterface

Defined in:
lib/rom/plugins/relation/sql/auto_combine.rb

Instance Method Summary collapse

Instance Method Details

#for_combine(spec) ⇒ SQL::Relation

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Default methods for fetching combined relation

This method is used by default by ‘combine`

Returns:



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# File 'lib/rom/plugins/relation/sql/auto_combine.rb', line 31

def for_combine(spec)
  source_key, target_key, target =
    case spec
    when ROM::SQL::Association
      [*spec.join_keys(__registry__).flatten, spec.call(__registry__)]
    else
      [*spec.flatten, self]
    end

  target.preload(source_key, target_key)
end

#preload(source_key, target_key, source) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/rom/plugins/relation/sql/auto_combine.rb', line 44

def preload(source_key, target_key, source)
  where(target_key => source.pluck(source_key.to_sym))
end