Ruby-on-rails 如何在没有验证的情况下更新属性
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How to update attributes without validation
提问by Brian Roisentul
I've got a model with its validations, and I found out that I can't update an attribute without validating the object before.
我有一个带有验证的模型，我发现我无法在没有验证对象的情况下更新属性。
I already tried to add on => :createsyntax at the end of each validation line, but I got the same results.
我已经尝试on => :create在每个验证行的末尾添加语法，但得到了相同的结果。
My announcement model have the following validations:
我的公告模型具有以下验证：
validates_presence_of :title
validates_presence_of :description
validates_presence_of :announcement_type_id
validate :validates_publication_date
validate :validates_start_date
validate :validates_start_end_dates
validate :validates_category
validate :validates_province
validates_length_of :title, :in => 6..255, :on => :save
validates_length_of :subtitle, :in => 0..255, :on => :save
validates_length_of :subtitle, :in => 0..255, :on => :save
validates_length_of :place, :in => 0..50, :on => :save
validates_numericality_of :vacants, :greater_than_or_equal_to => 0, :only_integer => true
validates_numericality_of :price, :greater_than_or_equal_to => 0, :only_integer => true
My rake task does the following:
我的 rake 任务执行以下操作：
task :announcements_expiration => :environment do
announcements = Announcement.expired
announcements.each do |a|
#Gets the user that owns the announcement
user = User.find(a.user_id)
puts a.title + '...'
a.state = 'deactivated'
if a.update_attributes(:state => a.state)
puts 'state changed to deactivated'
else
a.errors.each do |e|
puts e
end
end
end
This throws all the validation exceptions for that model, in the output.
这会在输出中抛出该模型的所有验证异常。
Does anybody how to update an attribute without validating the model?
有没有人如何在不验证模型的情况下更新属性？
回答by Olivier Grimard
You can do something like:
您可以执行以下操作：
object.attribute = value
object.save(:validate => false)
回答by Salil
USE update_attributeinstead of update_attributes
使用update_attribute而不是update_attributes
Updates a single attribute and saves the record without going through the normal validation procedure.
更新单个属性并保存记录，而无需通过正常的验证程序。
if a.update_attribute('state', a.state)
Note:- 'update_attribute' update only one attribute at a time from the code given in question i think it will work for you.
注意：- 'update_attribute' 从有问题的代码中一次只更新一个属性，我认为它对你有用。
回答by res
try using
尝试使用
@record.assign_attributes({ ... })
@record.save(validate: false)
works for me
对我来说有效
回答by William Wong Garay
Yo can use:
你可以使用：
a.update_column :state, a.state
Check: http://apidock.com/rails/ActiveRecord/Persistence/update_column
检查：http: //apidock.com/rails/ActiveRecord/Persistence/update_column
Updates a single attribute of an object, without calling save.
更新对象的单个属性，而不调用 save。
回答by MZaragoza
All the validation from model are skipped when we use validate: false
当我们使用时，将跳过模型的所有验证 validate: false
user = User.new(....)
user.save(validate: false)
回答by Saifis
Shouldn't that be
不应该是
validates_length_of :title, :in => 6..255, :on => :create
so it only works during create?
所以它只在创建期间有效？
