nested_form：孩子在验证错误时消失

Question

我能够验证子记录，但是在提交表单后，有错误的记录会消失。

class Deduction < ActiveRecord::Base
    belongs_to :parent_source, polymorphic: true, inverse_of: :deductions
    belongs_to :debt, polymorphic: true, inverse_of: :deductions
    validates :payee_id, presence: true
    validates :debt_id, presence: true
    validates_uniqueness_of :debt_id, scope: :parent_source
end


class Voucher < ActiveRecord::Base
    has_many :deductions, dependent: :destroy, as: :parent_source, inverse_of: :parent_source
    accepts_nested_attributes_for :deductions, allow_destroy: true
end

Answer 1

不确定您的控制器是什么样的，但如果保存失败，请尝试将以下行添加到控制器的create操作中：

@ voucher.deductions.build除非@ voucher.errors.any？