Class: Mongoid::Persistence::Atomic::AddToSet

Inherits:
Object
  • Object
show all
Includes:
Operation
Defined in:
lib/mongoid/persistence/atomic/add_to_set.rb

Overview

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

Instance Attribute Summary

Attributes included from Operation

#document, #field, #options, #value

Instance Method Summary collapse

Methods included from Operation

#collection, #initialize, #path, #prepare

Instance Method Details

#operation(modifier) ⇒ Hash

Get the atomic operation to perform.

Examples:

Get the operation.

add_to_set.operation("$addToSet")

Parameters:

  • modifier (String) —

    The modifier to use.

Returns:

  • (Hash) —

    The atomic operation for the field and addition.

Since:

  • 2.0.0



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# File 'lib/mongoid/persistence/atomic/add_to_set.rb', line 45

def operation(modifier)
  { modifier => { path => value.is_a?(Array) ? { "$each" => value } : value}}
end

#persist ⇒ Object

Sends the atomic $addToSet operation to the database.

Examples:

Persist the new values.

addToSet.persist

Returns:

  • (Object) —

    The new array value.

Since:

  • 2.0.0



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

def persist
  prepare do
    document[field] = [] unless document[field]
    values = document.send(field)
    Array.wrap(value).each do |val|
      values.push(val) unless values.include?(val)
    end
    values.tap do
      if document.persisted?
        collection.update(document.atomic_selector, operation("$addToSet"), options)
        document.remove_change(field)
      end
    end
  end
end