hierarchy | 易学教程

Symfony2: Storing users, roles, role hierarchy, and access controls in database

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问题 I've been working with Symfony (2.x) for the first time and I had some questions regarding the definition of roles, role hierarchy, and how they can be assigned to individual users. I was interested in storing the roles and role hierarchy in a database (rather than security.yml); however, I cannot find any documentation supporting this. Is this advisable? I was interested in having an admin module that can add new roles and define role hierarchies; however, having the admin module modify

Swift: “Attempt to present UIAlertController whose view is not in the window hierarchy!”

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I'm trying to display a UIAlertController when a button is clicked (button click runs certain code, and depending on said outcome - the Alert shows up). The initial ViewController is the default one, and I've created a second one (ConsoleViewController). The user logs in, and upon successful log in, segues to the next view (ConsoleViewController), which displays data (which is in the viewDidLoad() section of the ConsoleViewController). Once the user clicks "Check In", the app captures the GPS location of the device, the current date/time, and opens the camera to take a (selfie) picture. Upon

Many-to-Many Hierarchy with Multiple Parents - PHP, MySQL

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I'm trying to create a list of technology books by category, where each book can belong to more than one category, and each category can be both a parent category and a sub-category. Here's an illustration: JavaScript JavaScript Patterns Object-Oriented JavaScript Ajax Ajax Definitive Guide Bulletproof Ajax jQuery Learning jQuery 1.3 PHP jQuery Cookbook PHP PHP in a Nutshell PHP jQuery Cookbook Ajax Ajax Definitive Guide Bulletproof Ajax XML XML Hacks No-Nonsense XML -- As you can see... The book "PHP jQuery Cookbook" belongs to two categories: PHP and jQuery The category "Ajax" is both a

Symfony 2 ACL and Role Hierarchy

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I'm a little stuck and unable to find the answer to this. In my app test I've created two Entities User and Comment both are mapped correctly. I have created a small controller which depending on the user will add the comment and the data to the ACL tables, if I create my comment as a standard user with the associated for of 'ROLE_USER', and Try to access it as user with the role 'ROLE_ADMIN' I get access denied, it seems to completely ignore the security.yml hierarchy. I know this works by adding instead of the userid the ROLE_USER etc but I don't want to do it this way. Examples of my code

C++ : Multiple inheritance with polymorphism

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问题 (pardon the noob question in advance) I have 4 classes: class Person {}; class Student : public Person {}; class Employee : public Person {}; class StudentEmployee : public Student, public Employee {}; Essentially Person is the base class, which are directly subclassed by both Student and Employee . StudentEmployee employs multiple inheritance to subclass both Student and Employee . Person pat = Person("Pat"); Student sam = Student("Sam"); Employee em = Employee("Emily"); StudentEmployee sen

Recursive CTE to find all ancestors OF ALL ITEMS

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I have a simple hierarchy and need to be able to generate a single table that matches EACH item in the table with ALL of its ancestors. (Caps to emphasize that this is not a duplicate question!) So here's a table: Select Item='A', Parent=null into Items union Select Item='B', Parent='A' union Select Item='C', Parent='A' union Select Item='D', Parent='B' union Select Item='E', Parent='B' union Select Item='F', Parent='C' union Select Item='G', Parent='C' union Select Item='H', Parent='D' Go ... which represents this hierarchy: A / \ B C / \ / \ D E F G / H So B has one ancestor (A), and H has 3

jQuery to get next match in the DOM after a particular element

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I hate to admit it but I'm stuck trying to figure out how to do this. e.g. pretending you have the following structure: <div> ... <div> <ul> <li> <a href="..."><img class="foo"/></a> </li> <li> <a href="..."><img class="bar"/></a> </li> <li> <a href="..."><img class="foo"/></a> </li> <li> <a href="..."><img class="baz"/></a> </li> <li> <a href="..."><img class="foo"/></a> </li> </ul> </div> ... <div> <ul> <li> <a href="..."><img class="foo"/></a> </li> <li> <a href="..."><img class="baz"/></a> </li> <li> <a href="...

Ruby on Rails: Routing for a tree hierarchy of places

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问题 So we've got a legacy system that tracks places with IDs like "Europe/France/Paris", and I'm building a Rails facade to turn this into URLs like http:// foobar/places/Europe/France/Paris. This requirement is not negotiable, the number of possible levels in unlimited, and we can't escape the slashes. Setting up routes.rb for http://foobar/places/Europe is trivial: map.resources :places ...but http:// foobar/places/Europe/France complains "No action responded to Europe". I tried: map.connect '

how to get the hierarchical menu from mysql

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问题 I have a table having hierarchical menus like "id" "parent_id" "name" 1 0 menu 2 1 item1 3 2 item1_1 4 1 item2 5 4 item2_1 ... ... and I have 100s of menu items here. In order to get all items in an array I have to write a recursive function like this getmenu function(parent_id = 1) { $items = mysql_query("SELECT id FROM table WHERE parent_id = " + parent_id); while ($item = msyql_Fetch_assoc($items)) { ...here I put them in array and call recursive function again to get sub items... getmenu(

r - hierarchical data frame from child/parent relations

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I have a child - parent data.frame that I want to transform to a complete hierarchical list with all levels and a level number. The example data below goes to three levels, but it could be more. What function can I use to transform the data? Source: data.frame(name = c("land", "water", "air", "car", "bicycle", "boat", "balloon", "airplane", "helicopter", "Ford", "BMW", "Airbus"), parent = c(NA, NA, NA, "land", "land", "water", "air", "air", "air", "car", "car", "airplane")) name parent 1 land <NA> 2 water <NA> 3 air <NA> 4 car land 5 bicycle land 6 boat water 7 balloon air 8 airplane air 9