我有以下模型JobRequest :: Receipt。
你可以看到:amount属性是一个大十字形。
list1 = [1, 2, 3, 4, 5]
excluded_index = [1]
new_list = [i for n, i in enumerate(list1) if n not in excluded_index]
>>> new_list
[1, 3, 4, 5]
excluded_index = [1, 3]
>>> [i for n, i in enumerate(list1) if n not in excluded_index]
[1, 3, 5]
这就是对象的样子
# Table name: job_request_line_headers
#
# id :integer not null, primary key
# type :string(255)
# job_request_id :integer
# merchant_company_id :integer
# merchant_id :integer
# default_setting :boolean default(FALSE)
# payment_amount :decimal(12, 4)
# payment_state :integer default(0)
# payment_at :datetime
# deleted_at :datetime
# published_at :datetime
# delivered_at :datetime
# created_at :datetime
# updated_at :datetime
# related_line_header_id :integer
# amount :decimal(12, 4)
如果我尝试以下面的任何方式更新amount属性,它将提交SQL,但它不会更新值
撬(主)GT; JobRequest :: Receipt.last.update_attribute(:amount,22.3)
撬(主)GT; JobRequest :: Receipt.last.update_attribute(:amount,BigDecimal.new(22.3,5)
金额= BigDecimal.new(22.3,5)
撬(主)GT; JobRequest :: Receipt.last.update_attribute(:金额,金额)
其中任何一项都将返回金额设为零。
> JobRequest::Receipt id: 24, type: "JobRequest::Receipt",
> job_request_id: 19, merchant_company_id: nil, merchant_id: nil,
> default_setting: false, payment_amount: nil, payment_state: 1,
> payment_at: nil, deleted_at: nil, published_at: nil, delivered_at:
> nil, created_at: "2016-03-07 06:58:49", updated_at: "2016-03-07
> 06:58:49", related_line_header_id: nil, amount:
> #<BigDecimal:7ffe424c7d48,'0.0',9(18)
任何线索我做错了什么?
答案 0 :(得分:0)
我只是在“herouku run rails console”上以下面的方式在Bigdecimal字段上做到了:
$ i = Item.find(47)
$ i.selling_price = 25.00
$ i.save!
$ i.selling_price
OUTPUT: BigDecimal:7f3cdfe1d598,'0.25E2',9(18)