controller

问题 I'm getting the following error on Play 2.1.3: [RuntimeException: Cannot instantiate class controllers.Application$User. It must have a default constructor] Here's my Application.java file...I can't tell what I'm doing wrong! This occurs when I make a POST request to /login. package controllers; import play.mvc.*; import play.data.*; import views.html.*; public class Application extends Controller { private static boolean loggedin = false; private static User currentUser; private static Form

问题 We are creating an user's editing data page, so the textfield already comes filled with the user data and users can change and save it... The problem is that when I start to enter character into textfield, the cursor get lost, every character that I enter (from the device keyboard), the cursor goes to the first character... and if I remove the controller with my initial value, it works fine, but then I can not have my textfield filled with the users data. Code sample: child: StreamBuilder

问题 My problem is that my directive doesnt show the template. I added a html tag with specific name in my controller to the dom via "$sce.trustAsHtml(taskDirective)" and "$compile(taskDirective)($scope)" . The controller-function inside the directive is called. But the template is not showing up. Im using the $stateProvider , which calls the "TaskDetailCtrl" with the certain HTML. Anybody can help? Thank you!+ Controller: app.controller("TaskDetailCtrl", function ($scope, $state, $stateParams,

问题 I am working on one role based login system. Actually, What should I do to the controller, model and the views in this role based login system to allocate different access criteria. I am little confused about how to set and access for the user according to the role. Mainly I am not sure about how to allocate different view as a role. ex. I apply if condition to check role and then view according to the role the menu show the different links. like main admin can only watch account tab. the

问题 Am new to Spring boot. Am trying to create an endpoint that will add vehicle under manager. I have two entites Vehicle and Manager and corresponding DTO are below. ManagerDTO has reference of VehicleDTO VehicleDTO import javax.validation.constraints.Max; import javax.validation.constraints.Min; import javax.validation.constraints.NotNull; import javax.validation.constraints.Size; import com.fasterxml.jackson.annotation.JsonIgnore; import com.fasterxml.jackson.annotation.JsonInclude; import

问题 In a MVC project am trying to create a view which has the Title from a parent table and the subsequent list below it from its related Child table. I pulled the tables into the project using Entity Framework and in the controllers namespace created the follwing Viewmodel: public class ServicesViewModel { public ServicesViewModel(List<ServiceGroup> servicegroups, List<Service> services) { this.ServiceGroups = servicegroups; this.Service = services; } public List<ServiceGroup> ServiceGroups {

问题 I want to create a polymorphic friendship/network system. For example User can request or be requester to join multiple models like: Company Project Group Contacts(friends) Some will be one to many e.g. a user is employed by one company but a company has many employees. Others many to many e.g a user has many projects a project has many users The relationships aren't to difficult to create using active recorded. The middle step, requesting(invitations) that has me baffled. After bit of

问题 I am receiving the following error on a project of mine: First argument in form cannot contain nil or be empty. I am trying to create an edit page for my code. Fairly new with Rails and trying to learn without scaffolding. Controller: class BooksController < ApplicationController def new @book = Book.new @authors = Author.all end def edit @book = Book.find(params[:id]) end def show #Notice how the @books is plural here. @books = Book.all @authors = Author.all #@books = Book.where(id: params[

问题 I have a cakephp project under folder FC such that on ubuntu, it's path is /var/www/FC/app/... Upon uploading to ec2 and making all configuration changes, the base path, ie. index.php is correctly opening but any other link on index.php is giving an error: Error: FCController could not be found. Error: Create the class FCController below in file: app/Controller/FCController.php class FCController extends AppController { } Upon creating this file, it asks to put method locations into the class

问题 The following code finds the current users iPhone geolocation on load and loads a google map accordingly using a directive. Unfortunately the geolocationData data variable from the directive does not get shared to the html footer {{geolocationData}}... So how can I pass in this case the geolocationData across from the directive to the html page and/or the controller. Thank you. Directive: 'use strict'; angular.module('MyApp.directives', ['ngCordova']) .directive('map', function(