destroy

问题 I have the traditional friendship model: The user model has: has_many :friendships, :dependent => :destroy has_many :friends, :through => :friendships, :dependent => :destroy has_many :inverse_friendships, :class_name => "Friendship", :foreign_key => "friend_id", :dependent => :destroy has_many :inverse_friends, :through => :inverse_friendships, :source => :user, :dependent => :destroy I would like to define the status "friend" only if a friend request has been sent, and accepted by the other

问题 I believe this is a bug in Rails 3. I am hoping someone here can steer me in the correct direction. The code posted below, is purely for illustration of this problem. Hopefully this does not confuse the issue. Given I have a Post model, and a Comment model. Post has_many Comments, and Comment belongs_to Post. With a default_scope set on the Post model, defining joins() and where() relations. In this case where() is dependent on joins(). Normally Posts wouldn't be dependent on Comments. Again,

问题 I just noticed that all the various delete links in my application now just go to show pages. This application began as rails 2.3.8, it is now rails 3.2.17 Examples of the rails code: Controllers, def destroy @group = Group.find(params[:id]) @group.destroy respond_to do |format| format.html { redirect_to(groups_url) } format.xml { head :ok } end end And, def destroy @link = Link.find(params[:id]) @link.destroy respond_to do |format| format.html { redirect_to(links_url) } end end Which

问题 from tkinter import * class GameBoard(Frame): def __init__(self): Frame.__init__(self) self.master.title("test") self.grid() #button frame self.__buttonPane = Frame(self) self.__buttonPane.grid() #buttons self.__buttonA1 = Button(self.__buttonPane,text = "A1",command = self._close) self.__buttonA1.grid() def _close(self): GameBoard().destroy() def main(): GameBoard().mainloop() main() How would I make my function for close to work? 回答1: GameBoard() creates a new instance of GameBoard .

问题 Now I'm developing a project about softlayer api, I create a child account by SoftLayer_Brand::createCustomerAccount. Then I wan't to destroy the child account by softlayer api. Is there certain method to destroy? Or make the account does not work by softlayer api? regards~ 回答1: http://sldn.softlayer.com/reference/services/SoftLayer_Brand there you can find all the available methods for brands, I am afraid you cannot cancel an account that taks only can be performed by softlayer employee, so

问题 Elementor Pro (the WordPress page builder) integrates beautifully with Swiper, tying their GUI to the JS parameters and database content. However, for my project, I need to make some changes to the Swiper "CoverFlow" skin Init parameters (show more slides, change the 3D effect facing direction...). My hope is to to use the Destroy method of the Swiper API which looks like: mySwiper.destroy(deleteInstance, cleanStyles); Then I can initialize the Swiper again, with my own custom parameters. The

问题 I am using session variables to control logins and page access. I use variables to control different user groups that a user belongs to, so I have quite a few session variables. I also use a session variable to remember the users last visited page upon refresh. When the user logs out, I use session_destroy(); to remove all variables. What i would like to do is to maintain the last visited page variable even after the user has logged out. I think I could do it by using the unset function on

问题 I have a Tab Activity with 2 tabs (activities). Each tab has a 3d Open GL scene drawn on top of a SurfaceView with camera preview. Yet, depending on device orientation, tabs are being switched. The problem is that when the other activity starts, it calls camera.open(), which generates exception, saying that camera service is unavailable. In fact, the problem is that camera is not stopped when activity is paused, in other words onSurfaceDestroyed() is not called for the SurfaceView. I tried to

问题 How do I release resources used in 1 activity? So I got 3 layouts and activity for each layout, but the problem is when I switch between those activities my app crashes and I get this: I started getting this error ever since I added adds to my application. My whole logcat http://i.imgur.com/t5G94dC.png XML Layout: <?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:ads="http://schemas.android.com/apk/lib/com.google.ads"

问题 is it possible to tell the container of spring to destroy a specific bean (prototype) in order to save up memory? I dont want to user ctx.close() in order to see this bean destroyed, but rather on runtime. 回答1: If I understand you correctly you want to remove bean that was defined in the ctx at runtime, will I use BeanDefinitionRegistry to get this done, BeanDefinitionRegistry has a method of removeBean() which takes the bean name as the parameter. BeanDefinitionRegistry factory =