问规范通过所需的attr_accessor

EN

describe Record do
  it "calculates the first term grade" do
    test = stub(id: 1, final_grade: 20)
    audition = stub(id: 1, final_grade: 20)
    record = Record.create!({
      first_term_knowledge: 15,
      first_term_attitude: 10,
      first_term_test_id: test.id,
      first_term_audition_id: audition.id})

    record.calculated_grade.should_not be_nil
  end
end

1) Record calculates the first term grade
    Failure/Error: record = Record.create!({
    ActiveRecord::UnknownAttributeError:
      unknown attribute: first_term_knowledge
    # ./spec/models/record_spec.rb:7:in `block (2 levels) in <top (required)>'