This class provides the ability to perform an explicit $addToSet modification on a specific field.
Get the atomic operation to perform.
@example Get the operation.
add_to_set.operation("$addToSet")
@param [ String ] modifier The modifier to use.
@return [ Hash ] The atomic operation for the field and addition.
@since 2.0.0
# File lib/mongoid/persistence/atomic/add_to_set.rb, line 40 def operation(modifier) { modifier => { path => value.is_a?(Array) ? { "$each" => value } : value}} end
Sends the atomic $addToSet operation to the database.
@example Persist the new values.
addToSet.persist
@return [ Object ] The new array value.
@since 2.0.0
# File lib/mongoid/persistence/atomic/add_to_set.rb, line 18 def persist prepare do document[field] = [] unless document[field] values = document.send(field) Array.wrap(value).each do |val| values.push(val) unless values.include?(val) end execute("$addToSet") values end end
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