schneems/attendance

Speed up ActiveRecord#present? calls with the power of monkeypatching!

Schneems

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attendance's Issues

Breaks ActiveRecord::Associations::CollectionProxy objects within Pry rails console

TLDR: To duplicate the issue, start a console session using Pry as your default Rails console. Then try calling .empty? on an ActiveRecord::Associations::CollectionProxy object. You'll have to assign the object to a value, and then try calling .empty? on that value.

Possible Explanation:
Both ActiveRecord::Associations::CollectionProxy and ActiveRecord::Relation have different definitions of the empty? method, even though the former subclasses the latter.

empty? definition in ActiveRecord::Associations::CollectionProxy:

Owner: ActiveRecord::Associations::CollectionProxy
Visibility: public
Number of lines: 3

def empty?
  @association.empty?
end

empty? definition in ActiveRecord::Relation:

Owner: ActiveRecord::Relation
Visibility: public
Number of lines: 4

def empty?
  return @records.empty? if loaded?
  !exists?
end

Without Pry, in the default rails console, the alias call works correctly by aliasing blank? on both objects to the respective definitions of empty? in each class.

However, within the Pry console, the alias functionality breaks. empty? in both objects point to the definition in ActiveRecord::Relation, thus raising this error for ActiveRecord::Associations::CollectionProxy objects:

NoMethodError: undefined method `empty?' for nil:NilClass