Method: DataMapper::Adapters::DataObjectsAdapter#create

Defined in:
lib/dm-core/adapters/data_objects_adapter.rb

#create(resources) ⇒ Integer

For each model instance in resources, issues an SQL INSERT (or equivalent) statement to create a new record in the data store for the instance

Note that this method does not update identity map. A plugin needs to use adapter directly, it is up to plugin developer to keep identity map up to date.

Parameters:

  • resources (Enumerable(Resource)) —

    The list of resources (model instances) to create

Returns:

  • (Integer) —

    The number of records that were actually saved into the database



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# File 'lib/dm-core/adapters/data_objects_adapter.rb', line 30

def create(resources)
  resources.each do |resource|
    model      = resource.model
    serial     = model.serial(name)
    attributes = resource.dirty_attributes

    properties  = []
    bind_values = []

    # make the order of the properties consistent
    model.properties(name).each do |property|
      next unless attributes.key?(property)

      bind_value = attributes[property]

      # skip insering NULL for columns that are serial or without a default
      next if bind_value.nil? && (property.serial? || !property.default?)

      # if serial is being set explicitly, do not set it again
      if property.equal?(serial)
        serial = nil
      end

      properties  << property
      bind_values << bind_value
    end

    statement = insert_statement(model, properties, serial)
    result    = execute(statement, *bind_values)

    if result.to_i == 1 && serial
      serial.set!(resource, result.insert_id)
    end
  end
end