如何在Rails中加载此yml文件？

Question

I received this yml data file from a colleague who is unreachable. I need to load it to get the data, but I'm not sure how:

---
- !ruby/object:Question
  concise_attributes:
  - !ruby/object:ActiveModel::Attribute::FromDatabase
    name: id
    value_before_type_cast: 1
  - !ruby/object:ActiveModel::Attribute::FromDatabase
    name: name
    value_before_type_cast: Trip Summary
  - !ruby/object:ActiveModel::Attribute::FromDatabase
    name: question
    value_before_type_cast: Please state your general feelings about itinerary, the
      group, and the operations. How did it go overall?
  - !ruby/object:ActiveModel::Attribute::FromDatabase
    name: created_at
  - !ruby/object:ActiveModel::Attribute::FromDatabase
    name: updated_at
  new_record: false
  active_record_yaml_version: 2
- !ruby/object:Question
  concise_attributes:
  - !ruby/object:ActiveModel::Attribute::FromDatabase
    name: id
    value_before_type_cast: 2
  - !ruby/object:ActiveModel::Attribute::FromDatabase
    name: name
    value_before_type_cast: Itinerary
  - !ruby/object:ActiveModel::Attribute::FromDatabase
    name: question
    value_before_type_cast: Did you and the clients like the itinerary? If not, why
      not? How could it be improved? Was it accurate? Did you make any adjustments
      to the itinerary? Please describe any special things you did on the trip that
      were not part of the itinerary.
  - !ruby/object:ActiveModel::Attribute::FromDatabase
    name: created_at
  - !ruby/object:ActiveModel::Attribute::FromDatabase
    name: updated_at
  new_record: false
  active_record_yaml_version: 2

My first guess was to use the yaml_db gem, and then YAML::load_file itself directly, but I get the error:

ArgumentError: undefined class/module Question

Even though there is a Question model in the app"

class Question < ActiveRecord::Base
end

Answer 1

It appears to have been encoded with ActiveModel::AttributeSet::YAMLEncoder . You can use the decode method to parse the yaml file. The use of the concise_attributes is idiosyncratic to YAMLEncoder.

Rails Source Code

EDIT: While the file is under ActiveModel, to load it in a console use ActiveRecord::AttributeSet::YAMLEncoder