我运行了代码@transaction = Transaction.new
然后我给了它一些值:
<Transaction id: nil, debit_uri: "d8hmFJ89CIQUZMBoiPMnvWkQJW/bank_...", credit_uri: "d8hmciqLOg9bCIQUZMBoiPMnvWkQJW/cards...", seller_id: 2, buyer_id: 6, product_id: 31, price: #<BigDecimal:b4a6115c,'0.45E2',9(36)>, ship_price: #<BigDecimal:b4a61094,'0.123E3',9(36)>, ship_method: "fedex", created_at: nil, updated_at: nil>
但是当我做@transaction.save!
bang(!) 或不做时,我得到了错误:
NoMethodError: undefined method `clear' for nil:NilClass
from /home/alain/.rvm/gems/ruby-1.9.3-head/gems/activemodel-3.2.13/lib/active_model/validations.rb:194:in `valid?'
所以我不知道在哪里寻找错误,因为我的模型几乎没有,也没有称为 clear 的方法。
class Transaction < ActiveRecord::Base
attr_accessible :buyer_id, :credit_uri, :debit_uri, :price, :product_id, :seller_id, :ship_method, :ship_price
require 'balanced'
attr_reader :errors
end