Class: QueryDelegator

Inherits:
Object
  • Object
show all
Defined in:
lib/query_delegator.rb,
lib/query_delegator/be.rb,
lib/query_delegator/version.rb,
lib/query_delegator/memory_fetching.rb,
lib/query_delegator/respond_or_none.rb

Defined Under Namespace

Modules: Be, MemoryFetching, RespondOrNone

Constant Summary collapse

VERSION = 
"1.0.0"

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(relation) ⇒ QueryDelegator

Returns a new instance of QueryDelegator.



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# File 'lib/query_delegator.rb', line 10

def initialize(relation)
  @current_scope = relation.all
end

Class Method Details

.[](delegating) ⇒ Object

Returns a Proc which delegates an ActiveRecord model scope to query object instance method.



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# File 'lib/query_delegator.rb', line 29

def [](delegating)
  delegator = self

  if public_instance_method(delegating).arity.zero?
    proc do
      delegator.new(self).public_send delegating
    end
  else
    proc do |*options|
      delegator.new(self).public_send delegating, *options
    end
  end
end

.to_proc ⇒ Object

Returns a Proc which wraps an ActiveRecord scope in a new query object instance.



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# File 'lib/query_delegator.rb', line 16

def to_proc
  delegator = self

  proc do |*args|
    if equal? delegator
      new(*args)
    else
      delegator.(self, *args)
    end
  end
end