First time I'm using STI, and I'm running into issues when trying to use accepts_nested_attributes_for with nested inherited objects.
class Document < ApplicationRecord
# code removed for brevity
end
class DocumentItem < ApplicationRecord
# code removed for brevity
end
class Package < Document
belongs_to :user
validates :title, :user, presence: true
has_many :package_items, dependent: :destroy
accepts_nested_attributes_for :package_items, reject_if: :all_blank, allow_destroy: true
end
class PackageItem < DocumentItem
belongs_to :package
end
When I try and use nested attributes, things stop working:
Package.create!(title: 'test',
user: User.last,
package_items_attributes: [{title: 'test'}])
Which results in the following error:
ActiveRecord::RecordInvalid: Validation failed: Package items package must exist
I've tried setting foreign_key and class_name on the belongs_to relationship, with no luck:
class PackageItem < DocumentItem
belongs_to :package, foreign_key: 'document_id', class_name: 'Document'
end
What am I doing wrong here?
UPDATE:
This seems to be an issue with Rails 5 and associations having required: true by default. When turning off required: true and setting foreign_key on the Invoice model, it correctly assigns the parent model ID and saves the parent model and child models.
