Class: Mongoid::Persistence::Atomic::Pop

Inherits:

Object

• Object
• Mongoid::Persistence::Atomic::Pop

Includes:

Operation

Defined in:

lib/mongoid/persistence/atomic/pop.rb

Overview

This class provides the ability to perform an explicit $pop modification on a specific field.

Instance Attribute Summary

Attributes included from Operation

#document, #field, #options, #value

Instance Method Summary

• #persist ⇒ Object

  Sends the atomic $pop operation to the database.

Methods included from Operation

#collection, #initialize, #operation, #path, #prepare

Instance Method Details

#persist ⇒ Object

Sends the atomic $pop operation to the database.

Examples:

Persist the new values.

pop.persist

Returns:

• (Object) —

  The new array value.

Since:

• 2.1.0

# File 'lib/mongoid/persistence/atomic/pop.rb', line 19

def persist
  prepare do
    if document[field]
      values = document.send(field)
      value > 0 ? values.pop : values.shift
      execute("$pop")
      values
    end
  end
end