Module: ActiveRecordExtension::ClassMethods

Defined in:
lib/activeupdate.rb

Instance Method Summary collapse

Instance Method Details

#update!(ids, attributes) ⇒ Object

Updates an object (or multiple objects) and saves it to the database. The resulting object is returned whether the object was saved successfully to the database or not.

Parameters:

  • ids (Array) —

    an array of ids

  • attributes (Array) —

    an array of attribute hashes

Returns:

  • (Object) —

    the object.



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# File 'lib/activeupdate.rb', line 11

def update!(ids, attributes)
  update_manager = Arel::UpdateManager.new

  resources = self.arel_table

  attribute_hash = {}

  resources_id = resources[:id]

  attributes.each_with_index do |attribute, index|
    attribute.each do |key, value|
      attribute_hash[key] = Arel::Nodes::Case.new(resources_id) unless attribute_hash[key]
      attribute_hash[key].when(ids[index]).then(value)
    end
  end

  attribute_array = attribute_hash.map do |attribute, values|
    attribute = resources[attribute.to_sym]
    [attribute, Arel::Nodes::SqlLiteral.new(values.else(attribute).to_sql)]
  end

  update_manager.table(resources).where(resources_id.in(ids))
  ActiveRecord::Base.connection.execute(update_manager.set(attribute_array).to_sql)

  self
end