Question

在我的Rails应用中，update_attribute似乎无效。我正在尝试更新名为billed的布尔字段。同样的命令适用于另外两个表。

rails console的输出：

>> Expense.find(28).update_attributes(:billed => true)
=> false
>> Expense.find(28).billed
=> false

expenses_controller.rb：

# PUT /expenses/1
# PUT /expenses/1.json
def update
  @expense = Expense.find(params[:id])

  respond_to do |format|
    if @expense.update_attributes(params[:expense])
      format.html { redirect_to @expense, notice: 'Expense was successfully updated.' }
      format.json { render json: @expense }
    else
      format.html { render action: "edit" }
      format.json { render json: @expense.errors, status: :unprocessable_entity }
    end
  end
end

费用有这些验证：

  validates_presence_of :employee_id       # Declare a required field
  validates_presence_of :unitcost          # Declare a required field
  validates_presence_of :quantity          # Declare a required field
  validates_presence_of :exp_date          # Declare a required field
  validates_presence_of :category_id       # Declare a required field
  validates_presence_of :description       # Declare a required field
  validates_presence_of :markup            # Declare a required field
  validates :markup, :format => { :with => /^\d{3}$/}, :numericality => {:greater_than => 0}
  validates :unitcost, :format => { :with => /\A\d+(?:\.\d{0,2})?\z/}, :numericality => {:greater_than => 0}
  validates_numericality_of :quantity, :only_integer => true, :message => "Can only be whole number."

感谢您的帮助！

Answer 1

使用 update_attribute 代替 update_attributes 更新单个列。

来自 API

update_attribute

更新单个属性并保存记录而不经过   正常的验证程序。这对布尔值特别有用   现有记录上的标志。 Base中的常规update_attribute方法   当混合验证模块时，将替换为this   默认情况下

Expense.find(28).update_attribute(:billed => true)

Rails update_attributes不起作用

1 个答案: