Question

我一直得到错误未定义的方法`＆gt;'对于nil：当我在Billing模型上运行我的rspec时NilClass。以下是我的模型代码

class Billing < ActiveRecord::Base
  validate :start_date, :end_date, presence: true
  validate :is_valid_date?

  def is_valid_date?
    errors.add(:start_date, 'must be in the past') if start_date > Time.current.to_date
    errors.add(:end_date, 'must be in the past') if end_date > Time.current.to_date
    errors.add(:end_date, 'must be more than or equal to start date') if start_date > end_date
  end
end

这是我的rspec代码

require 'rails_helper'
RSpec.describe FamilyBilling, type: :model do
  it { should validate_presence_of(:start_date) }
  it { should validate_presence_of(:end_date) }
  it { should validate_presence_of(:amount) }
  it { should validate_presence_of(:hours) }
  it { should validate_presence_of(:rate) }
  it { should validate_presence_of(:processing_fee) }       
  it { should_not validate_presence_of(:tip) }
end

运行rspec时出现此错误

Failed examples:
rspec ./spec/models/billing_spec.rb:8 # Billing should require start_date to be set
rspec ./spec/models/billing_spec.rb:9 # Billing should require end_date to be set
rspec ./spec/models/billing_spec.rb:10 # Billing should require amount to be set
rspec ./spec/models/billing_spec.rb:11 # Billing should require hours to be set
rspec ./spec/models/billing_spec.rb:12 # Billing should require rate to be set
rspec ./spec/models/billing_spec.rb:13 # Billing should require processing_fee to be set
rspec ./spec/models/billing_spec.rb:14 # Billing should not require tip to be set

并且所有这些都显示此错误

Failure/Error: errors.add(:start_date, 'must be in the past') if start_date > Time.current.to_date

NoMethodError:
    undefined method `>' for nil:NilClass

我做错了什么？

Answer 1

您的自定义验证程序希望start_date和end_date都必须存在。如果它们不存在则抛出错误 - 例如：start_date > Time.current.to_date。

因此，您应该明确验证其存在并检查它们是否存在于您的自定义验证器中：

class Billing < ActiveRecord::Base
  validates :start_date, :end_date, presence: true
  validate :dates_valid?

  def dates_valid?
    errors.add(:start_date, 'must be in the past') if start_date && start_date > Time.current.to_date
    errors.add(:end_date, 'must be in the past') if end_date && end_date > Time.current.to_date
    errors.add(:end_date, 'must be more than or equal to start date') if start_date && end_date && start_date > end_date
  end
end

Rails Rspec - 模型属性未定义方法`＆gt;'为零：NilClass

1 个答案: