Ruby 6 模型的数值验证：假

Question

我想确保仅当记录设置了另一个标志时才填充某些字段（反之亦然）。 然而，我的测试允许模型在我认为它应该失败的时候保存。

class Measurement < ApplicationRecord

    validates :start_date, presence: true
    validates :end_date, presence: true
    validates :actual, numericality: true,    if: :is_baseline?      # baseline must have actual value
    validates :forecast, numericality: false, if: :is_baseline?      # baseline must not have forecast value
    validates :target, numericality: false,   unless: :is_target?    # only target can have target value
    validates :target, numericality: true,    if: :is_target?        # only target can have target value

    belongs_to :measure
    belongs_to :organisation

end

Answer 1

这不是这些验证的工作方式。 numericality: false<\/code>不会验证相反的结果，但会关闭验证。

但是，您可以使用absence<\/code><\/a>验证器检查是否未设置值：

validates :actual,   numericality: true, if: :is_baseline?      # baseline must have actual value
validates :forecast, absence: true,      if: :is_baseline?      # baseline must not have forecast value
validates :target,   absence: true,      unless: :is_target?    # only target can have target value
validates :target,   numericality: true, if: :is_target?        # only target can have target value