问题描述
我想要一个可供整个应用程序全局访问的变量.用户将填写单个输入字段表单.然后它将被保存到数据库中,并且该变量可以在任何地方访问.所以这是我到目前为止所做的.
I want a variable that is globally accessible to the whole app. The user will fill a single input field form. It will be then saved into the database and that variable will be accessible anywhere. So here is what I have done so far.
class ApplicationController < ActionController::Base
# Prevent CSRF attacks by raising an exception.
# For APIs, you may want to use :null_session instead.
protect_from_forgery with: :exception
before_action :save_page
def save_page
@page_name = params[:page_name ]
test_page_name = PageName.new
test_page_name.name = @page_name
if test_page_name.save
redirect_to(controller: 'template',action: 'templates')
end
end
end
表单提交给 ApplicaitonController 中的 save_page 方法,保存后被重定向.因为这种方法会在成功保存到数据库的情况下重定向,所以给我带来了问题.我该如何解决这个问题?
The form is submitted to save_page method in ApplicaitonController and after being saved it is redirected. Because this method will redirect in case of successfully saved into database, it is giving me problem. How can I fix this?
我也试过这样但没有运气
I also tried like this but no luck
class ApplicationController < ActionController::Base
# Prevent CSRF attacks by raising an exception.
# For APIs, you may want to use :null_session instead.
protect_from_forgery with: :exception
before_action :page_name
def save_page
@page_name = params[:page_name ]
test_page_name = PageName.new
test_page_name.name = @page_name
if test_page_name.save
redirect_to(controller: 'template',action: 'templates')
end
end
def page_name
@user_page_name = @page_name
end
end
但是当我试图在视图中打印 @user_page_name 的值时,我什么也没得到.
but when I tried to print the value of @user_page_name in the view I got nothing.
推荐答案
class ApplicationController < ActionController::Base
# Prevent CSRF attacks by raising an exception.
# For APIs, you may want to use :null_session instead.
protect_from_forgery with: :exception
before_action :page_name
def param_page
@page_name=params[:page_name]
end
def save_page
param_page
test_page_name = PageName.new
test_page_name.name = @page_name
if test_page_name.save
redirect_to(controller: 'template',action: 'templates')
end
end
def page_name
param_page
@user_page_name = @page_name
end
end
这篇关于rails 中的全局可访问变量的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!