Ruby-on-rails 跳过模型中的某些验证方法
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/8881712/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
skip certain validation method in Model
提问by Leem.fin
I am using Rails v2.3
我正在使用Rails v2.3
If I have a model:
如果我有一个模型：
class car < ActiveRecord::Base
validate :method_1, :method_2, :method_3
...
# custom validation methods
def method_1
...
end
def method_2
...
end
def method_3
...
end
end
As you see above, I have 3 custom validation methods, and I use them for model validation.
正如您在上面看到的，我有3 个自定义验证方法，我将它们用于模型验证。
If I have another method in this model class which save an new instance of the model like following:
如果我在这个模型类中有另一种方法来保存模型的新实例，如下所示：
# "flag" here is NOT a DB based attribute
def save_special_car flag
new_car=Car.new(...)
new_car.save #how to skip validation method_2 if flag==true
end
I would like to skip the validation of method_2in this particular method for saving new car, how to skip the certain validation method?
我想跳过method_2这个保存新车的特定方法的验证，如何跳过某些验证方法？
回答by shime
Update your model to this
将您的模型更新为此
class Car < ActiveRecord::Base
# depending on how you deal with mass-assignment
# protection in newer Rails versions,
# you might want to uncomment this line
#
# attr_accessible :skip_method_2
attr_accessor :skip_method_2
validate :method_1, :method_3
validate :method_2, unless: :skip_method_2
private # encapsulation is cool, so we are cool
# custom validation methods
def method_1
# ...
end
def method_2
# ...
end
def method_3
# ...
end
end
Then in your controller put:
然后在您的控制器中输入：
def save_special_car
new_car=Car.new(skip_method_2: true)
new_car.save
end
If you're getting :flagvia params variable in your controller, you can use
如果您:flag通过控制器中的 params 变量获取，则可以使用
def save_special_car
new_car=Car.new(skip_method_2: params[:flag].present?)
new_car.save
end
回答by Micha? Szajbe
The basic usage of conditional validation is:
条件验证的基本用法是：
class Car < ActiveRecord::Base
validate :method_1
validate :method_2, :if => :perform_validation?
validate :method_3, :unless => :skip_validation?
def perform_validation?
# check some condition
end
def skip_validation?
# check some condition
end
# ... actual validation methods omitted
end
Check out the docs for more details.
查看文档以获取更多详细信息。
Adjusting it to your screnario:
将其调整为您的场景：
class Car < ActiveRecord::Base
validate :method_1, :method_3
validate :method_2, :unless => :flag?
attr_accessor :flag
def flag?
@flag
end
# ... actual validation methods omitted
end
car = Car.new(...)
car.flag = true
car.save
回答by Ravindra
Use block in your validation something like :
在您的验证中使用块，例如：
validates_presence_of :your_field, :if => lambda{|e| e.your_flag ...your condition}
回答by Wahaj Ali
Depending on weather flag is true of false, use the method save(false)to skip validation.
根据天气标志是真还是假，使用该方法save(false)跳过验证。
