When importing a CSV, how do I handle data in a row that corresponds to an association?

Question

I am following the Import CSV Railscast and it is straight forward.

The issue is that it deals with just a csv file containing only information in 1 model in 1 file.

Answer 1

try this

def self.import(file)
  CSV.foreach(file.path, headers: true) do |row|
    product = find_by_id(row["id"]) || new
    product.attributes = row.to_hash.slice(*accessible_attributes)
    product.save!

    building = product.buildings.find_by_name(row['building_name'])
    building ||= product.buildings.build
    building.attributes = row.to_hash.slice(*build_accessible_attributes)
    building.save!
  end
end

UPDATE: updated answers using new rails 3 methods

def self.import(file)
  CSV.foreach(file.path, headers: true) do |row|
    product = where(id: row["id"])
      .first_or_create!(row.to_hash.slice(*accessible_attributes))

    product.buildings.where(name: row['building_name'])
      .first_or_create!(row.to_hash.slice(*building_accessible_attributes))
  end
end