遍历数据库中的每个记录 - Ruby on Rails [英] Iterating through every record in a database - Ruby on Rails
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问题描述
n00b问题。我试图循环遍历我的数据库中的每个用户记录。伪代码可能看起来像这样:
def send_notifications
render:nothing => ; true
#从DB中随机选择消息记录
@message = Message.offset(rand(Message.count))。首先
random_message = @ message.content
@user = User.all.entries.each do
@user = User.find(:id)
number_to_text =
@ user.number = number_to_text #number是用户的电话号码
puts @ user.number
end
end
有人可以用最好的方法填充我吗? )
解决方案感谢大家! div>
这里是遍历所有User的正确语法:
User.all.each do | user |
#这里的代码为每个用户调用一次
#用户可以通过'user'变量
访问
$ b
此外,为了提高性能,您可能需要使用 User.find_each
(查看文档)而不是 User.all
n00b question. I'm trying to loop through every User record in my database. The pseudo code might look a little something like this:
def send_notifications
render :nothing => true
# Randomly select Message record from DB
@message = Message.offset(rand(Message.count)).first
random_message = @message.content
@user = User.all.entries.each do
@user = User.find(:id)
number_to_text = ""
@user.number = number_to_text #number is a User's phone number
puts @user.number
end
end
Can someone fill me in on the best approach for doing this? A little help with the syntax would be great too :)
Thanks everyone!
解决方案
Here is the correct syntax to iterate over all User :
User.all.each do |user|
#the code here is called once for each user
# user is accessible by 'user' variable
end
Also, to improve performance, you may want to use User.find_each
(see doc) instead of User.all
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