Rails 中的 jQuery Mobile 表单处理
我创建了一个 jQuery Mobile 表单，用于创建“用户”模型。该表单正确回发所有信息，但是我不确定如何处理相应控制器操作中的成功和失败情况。我通常会使用：
# POST /user
def create
@user = User.create(params[:user])
respond_to do |format|
format.mobile { @user.valid? ? redirect_to(root_url) : render(action: 'new') }
end
end
但是这会导致 jQuery Mobile 中出现奇怪的动画（即出现错误时滑出屏幕）。我有什么想法应该如何呈现错误吗？
谢谢！
I've created a jQuery Mobile form that is used for creating 'user' models. The form posts back all the information correctly, however I am not sure how to handle the success and failure cases in the action for the corresponding controller. I would typically use:
# POST /user
def create
@user = User.create(params[:user])
respond_to do |format|
format.mobile { @user.valid? ? redirect_to(root_url) : render(action: 'new') }
end
end
However this causes strange animations in the jQuery Mobile (i.e. slides the screen out on errors). Any ideas how I I should be rendering out the errors?
Thanks!
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我不了解手机，但如果这基本上是一个ajax请求，那么当出现问题时你需要返回
@user.errors.to_json。如果这只是一个普通的页面请求，那么您可以在视图中迭代@user.errors以显示您想要的错误。我也不建议使用 ? :
format.mobile块内的运算符。在respond_to内和各个格式块之外执行if语句，这样您就不必使用 ?当您添加更多格式块时， : 运算符会一遍又一遍地重复。如果你有 3 个格式块，你就会有 3 个 ? : 语句而不仅仅是 1 个 if。如果您只计划使用 1 种格式，则可以在
create操作中使用respond_with，然后在控制器顶部。您应该默认执行此操作，因为它可以正常工作并清理您的控制器操作。另外，您不想立即调用
User.create。您应该使用User.new，然后在主if语句中调用@user.save来确定出现错误时要执行的操作。这删除了 @user.valid?的调用，我认为更符合惯用语。I don't know about mobile phones, but if this is basically an ajax request, then you need to return
@user.errors.to_jsonwhen something went wrong. If it's just a normal page request, then you can iterate over@user.errorsin your view to display the errors however you want.I also wouldn't recommend using the ? : operator inside of your
format.mobileblock. Do anifstatement within therespond_toand outside of your individual format blocks so that you don't have to use the ? : operator over and over again as you add more format blocks. If you had 3 format blocks, you'd have 3 ? : statements rather than just 1 if.If you only plan on using 1 type of format, you can use
respond_withinside of thecreateaction, and then userespond_to :mobileat the top of the controller. You should do this by default since it just works and it cleans up your controller actions.Also, you don't want to call
User.createright away. You should rather useUser.newand then call@user.saveon it in your mainifstatement to determine what to do on errors. This removes the call of@user.valid?and I think is more idiomatically correct.