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AngularJS - Checklist-Model doesn't update the model correctly on checkbox change

I'm new to AngularJS and I'm having a problem with the Checklist-Model directive.
I'm using one of their examples to replicate this behavior.
When I click one checkbox and call a function, the model seems to be updated
correctly and is shown accordingly on the template, but when I log the contents of the model on the console the value of the checkbox I clicked is missing.
Here's when the strange stuff starts. If I click the checkbox again, then the value is removed from the template but I can see it on the console.
Here's the code:
HTML:
<div ng-controller="DemoCtrl">
<label ng-repeat="role in roles">
<input type="checkbox" checklist-model="user.roles"
checklist-value="role.text"
ng-change="changeValues(role)"> {{role.text}}
</label>
<br>
<button ng-click="checkAll()">check all</button>
<button ng-click="uncheckAll()">uncheck all</button>
<button ng-click="checkFirst()">check first</button>
<br><br>
user.roles {{ user.roles | json }}
</div>
Angular:
angular.module("DemoApp", ["checklist-model"])
.controller('DemoCtrl', function($scope) {
$scope.roles = [
{id: 1, text: 'guest'},
{id: 2, text: 'user'},
{id: 3, text: 'customer'},
{id: 4, text: 'admin'}
];
$scope.user = {
roles: ['guest', 'admin']
};
$scope.checkAll = function() {
$scope.user.roles = $scope.roles.map(function(item) { return item.id; });
};
$scope.uncheckAll = function() {
$scope.user.roles = [];
};
$scope.checkFirst = function() {
$scope.user.roles.splice(0, $scope.user.roles.length);
$scope.user.roles.push(1);
};
$scope.changeValues = function() {
console.log('Roles: ', JSON.stringify($scope.user.roles));
}
});
The first time I click a checkbox i.e: 'User' the output on the console is:
Roles: ["guest","admin"]
Then, when I uncheck the same checkbox the output is:
Roles: ["guest","admin","user"]
In the application I'm developing I MUST call a function when the checkbox changes it's value that's why I using the "ng-change" directive.
Can anybody explain what I'm doing wrong?
Thanks in advance.

checklist-model it's used the Id as checklist-value in the checkbox and in your code you use the text.
So in the function $scope.checkAll you should return the item.text instead item.id and in the function $scope.checkFirst you should push the $scope.roles.find(item => item.id == 1).text
And the rest seems correct

Dropdown menus in AngularJS

I have two dropdown menus in my angular app. When I select an option in the 1st dropdown menu, I want that choice to effect the 2nd dropdown menu. Example: 1st menu will have a list of status messages. When I select, let's say, "Need Maintenance" It will change the 2nd menu to the departments relevant to the Maintenance. Or if I choose the status "Lost", it will change the 2nd menu to the departments relevant to the Lost status. Here is my code and setup:
.controller('HomeCtrl', function($scope, $rootScope, $http, $ionicPlatform) {
// This disables the user from being able to go back to the previous view
$ionicPlatform.registerBackButtonAction(function (event) {
event.preventDefault();
}, 100);
// This function only gets called when the submit button is hit on the messaging screen. It posts to server for sending of message
$scope.submit = function() {
$http.post('http://localhost:8000/', {
messageText: $scope.messageText,
name: window.localStorage.getItem("username")
});
$scope.messageText = ""; //clearing the message box
}
})
<div class="form1" ng-controller="HomeCtrl">
<form class="form">
<select placeholder="Select a Subject" ng-model="selectSubject" data-ng-options="option.subject for option in subject"></select>
<select placeholder="Select a Department" ng-model="selectDept" data-ng-options="option.dept for option in dept"></select>
<input type="text" class="messageText" placeholder="Message" ng-model="messageText">
<button class="button" ng-click="submit()"><span>Submit</span></button>
</form>
</div>
That is my controller relevant to the html that is also posted.
I know how to get the information I need from my node server which will be housing the information. All I need help figuring out is changing the options within the 2nd menu when a option is clicked in the 1st menu.
I am thinking just having a http.get call when a option is clicked which will then populate the 2nd menu. The first menu will be static, not changing.

I've just started messing around with Angular and a database and and was able to dynamically populate one select based on the choice in another.
Below is the HTML for my two select boxes (my second select is a multiple, but you can obviously remove that attribute):
<label>Select a Table</label>
<select name="tableDropDown" id="tableDropDown"
ng-options="table.name for table in data.availableTables"
ng-model="data.selectedTable"
ng-change="getTableColumns()">
</select>
<label>Select Columns</label>
<select name="columnMultiple" id="columnMultiple"
ng-options="column.name for column in data.availableColumns"
ng-model="data.selectedColumns"
multiple>
</select>
And I have the controller below. The init function clears all of the data sources for the two select's, retrieves the list of tables (for the first select), sets the selected table to the first table in the list, and then calls the second function.
The second function (which is also called whenever the selected table changes, thanks to the ng-change directive) retrieves the metadata for the selected table and uses it to populate the second select with the list of available columns.
.controller('SimpleController', function($scope, $http) {
init();
function init() {
$scope.data = {
availableTables: [],
availableColumns: [],
selectedTable: {}
};
$http.get("http://some.server.address")
.then(function (response) {
$scope.data.availableTables = response.data.value;
$scope.data.selectedTable = $scope.data.availableTables[0];
$scope.getTableColumns();
});
}
$scope.getTableColumns = function () {
$scope.data.selectedColumns = [];
table = $scope.data.selectedTable.url;
if (table != "") {
$http.get("http://some.server.address/" + table + "/$metadata?#json")
.then(function (response) {
$scope.data.availableColumns = response.data.value;
});
}
}
...
});

maybe you can use the ng-change directive on the 1st select and using the callback function to populate the 2nd select in the way you prefer( http call or local data).

if your Departments objects has a references to the Subject object, something like a subject_id, you can just do a filter:
Example:
<div ng-controller="MyCtrl">
subjects
<select placeholder="Select a Subject" ng-model="selectSubject" ng-options="subject.name for subject in subjects"></select>
departmets
<select placeholder="Select a Department" ng-model="selectDept" ng-options="dept.name for dept in depts | filter:{ subject_id : selectSubject.id }"></select>
</div>
var myApp = angular.module('myApp',[]);
function MyCtrl($scope) {
$scope.subjects = [
{
id: 1,
name: "sub 1",
},
{
id: 2,
name: "sub 2",
}
];
$scope.depts = [
{
id: 1,
name: "Dep 1",
subject_id: 1
},
{
id: 2,
name: "Dep 2",
subject_id: 1
},
{
id: 3,
name: "Dep 3",
subject_id: 2
},
{
id: 4,
name: "Dep 4",
subject_id: 2
}
]
}

Strange behaviour Angular driven select list

According to paper "How to set the initial selected value of a select element using Angular.JS ng-options & track by" by #Meligy which I used as a guidance to learn and solve my problem with implementing a select list (ng-options), I still encounter some strange collaterale behaviour.
Although the basic behaviour finally does what it should do, see Test Plunk, I still encounter strange behaviour on the selected item in that list. Not in my test plunk though, implemented in my developement site.
app.controller("TaskEditCtrl", function($scope) {
$scope.loadTaskEdit = loadTaskEdit;
function loadTaskEdit() {
taskLoadCompleted();
tasktypesLoadCompleted();
}
function taskLoadCompleted() {
$scope.tasks = [{
Id: 1,
Name: "Name",
Description: "Description",
TaskTypesId: 4
}
];
$scope.current_task_tasktypesid = $scope.tasks[0].TaskTypesId;
}
function tasktypesLoadCompleted() {
var tasktypes = [{ Id: 1, Name: "A" },
{ Id: 2, Name: "B" },
{ Id: 3, Name: "C" },
{ Id: 4, Name: "D" }];
$scope.available_tasktypes_models = tasktypes
}
$scope.submit = function(){
alert('Edited TaskViewModel (New Selected TaskTypeId) > Ready for Update: ' + $scope.tasks[0].TaskTypesId);
}
loadTaskEdit();
});
HTML
<form class="form-horizontal" role="form" novalidate angular-validator name="editTaskForm" angular-validator-submit="UpdateTask()">
<div ng-repeat="task in tasks">
<div>
<select ng-init="task.TaskTypes = {Id: task.TaskTypesId}"
ng-model="task.TaskTypes"
ng-change="task.TaskTypesId = task.TaskTypes.Id"
ng-options="option_tasttypes.Name for option_tasttypes in available_tasktypes_models track by option_tasttypes.Id">
</select>
</div>
</div>
<div class="">
<input type="submit" class="btn btn-primary" value="Update" ng-click="submit()" />
</div>
</form>
As said, see my test plunk which shows exactly what it supposed to do. Moreover, using 5 self-explaining images, I do hope to make my troulbe bit clearer what's the problem.
I'm a bit lost to figure out what's so troublesome. My 'water' is telling me something wrong or missing in css. Did have anybody out their ever have face comparable? What could cause me this trouble? Does have anybody out there have a clue?
Thanks in advance
[1
[]2
[]3
[]4
Apparently I'm a rookie on css. Any suggestion is welcome!
CSS
#region "style sheets"
bundles.Add(new StyleBundle("~/Content/css").Include(
"~/Content/css/site.css",
"~/content/css/bootstrap.css",
"~/content/css/bootstrap-theme.css",
"~/Content/css/font-awesome.css",
"~/Content/css/morris.css",
"~/Content/css/toastr.css",
"~/Content/css/jquery.fancybox.css",
"~/Content/css/loading-bar.css"));
#endregion "style sheets"

The key with the dropdown is to set the model to the object that was selected. I updated your code to behave the way that I believe you are asking for it to work.
The key differences are:
Set the ng-model of the dropdown to the selected object and not the id of the selected item. This will give you access to the full selected object and all it's properties.
Remove the ng-change binding - this is not necessary with 2 way data binding, and the value on the model (whatever is put in for ng-model) will automatically be updated.
In your HTML you were using properties that were never declared in the Controller $scope. I updated those to reflect the available variables that were in scope.
For more information on dropdowns please see the angular documentation. It's very useful for figuring these types of issues out - https://docs.angularjs.org/api/ng/directive/select
// Code goes here
var app = angular.module("myApp", []);
app.controller("TaskEditCtrl", function($scope) {
$scope.tasks = {};
$scope.current_task_tasktypesid = null;
$scope.selected_task_tasktype = null;
$scope.loadTaskEdit = loadTaskEdit;
function loadTaskEdit() {
taskLoadCompleted();
tasktypesLoadCompleted();
//EDIT: DEFAULT DROPDOWN SELECTED VALUE
$scope.selected_task_tasktype = $scope.available_tasktypes_models[2];
}
function taskLoadCompleted() {
$scope.tasks = [{
Id: 1,
Name: "Name",
Description: "Description",
TaskTypesId: 4
}
];
$scope.current_task_tasktypesid = $scope.tasks[0].TaskTypesId;
}
function tasktypesLoadCompleted() {
var tasktypes = [{ Id: 1, Name: "A" },
{ Id: 2, Name: "B" },
{ Id: 3, Name: "C" },
{ Id: 4, Name: "D" }];
$scope.available_tasktypes_models = tasktypes
}
$scope.submit = function(){
alert('submitted model: ' + $scope.selected_task_tasktype.Id);
}
loadTaskEdit();
});
<!DOCTYPE html>
<html>
<head>
<script data-require="angular.js#*" data-semver="1.2.9" src="http://code.angularjs.org/1.2.9/angular.js"></script>
<link rel="stylesheet" href="style.css" />
<script src="script.js"></script>
</head>
<body ng-app="myApp" ng-controller="TaskEditCtrl as edit">
<form class="form-horizontal" role="form" novalidate angular-validator name="editTaskForm" angular-validator-submit="UpdateTask()">
<div ng-repeat="task in available_tasktypes_models">
<div>Task (Id): {{task.Id}}</div>
<div>Name: {{task.Name}}</div>
<div>Descripton: {{task.Description}}</div>
</div>
<p>Current Task.TaskTypesId: {{selected_task_tasktype.Id}}</p>
<div>
<select
ng-model="selected_task_tasktype"
ng-options="option_tasttypes.Name for option_tasttypes in available_tasktypes_models track by option_tasttypes.Id">
</select>
</div>
<p>{{task.TaskTypes}}</p>
<p>{{selected_task_tasktypesid = task.TaskTypes}}</p>
<div class="">
<input type="submit" class="btn btn-primary" value="Update" ng-click="submit()" />
</div>
</form>
</body>
</html>

First, I need to state the implementation of #Meligy and the suggested input of 'dball' are correct. So, go with the flow of your choice.
Keep notice on your style sheets.
Finally, I figured out that the style property 'color' with the value 'white' of selector #editTaskWrapper as identifier of the parent
<div id="editTaskWrapper">
acted as the bad guy. One way or the other, if I comment 'color: white' in
#editTaskWrapper {
background-color: #337AB7;
/*color: white;*/
padding: 20px;
}
the selected item in the selectlist becomes visible. All other controls and values are not affected, only the selected list item.

Issues in Implementing a Drop Down with Knockout

I am trying to replace a text box in the existing website with a dropdown menu with few options in it. Everything is working fine expect the value is not being stored/registered when the person hits register. But with the text box it works fine. Please see the code below that i have made for the drop down:
</label>
<label class="label-4 lcol1" for="d_name-suffix"><small>(optional)</small>
<select id="d_name-suffix" style="width:auto; height:auto" data-bind="options: $root.nameSuffix, value: nameSuffix, optionsText: 'options1'" />
</label>
JS:
self.nameSuffix = ko.observable([
{ options1: "Mr" },
{ options1: "Mrs" },
{ options1: "Miss" }
]).extend({ pattern: NineElevenRegistries.inputValidation.name });
And here is the code that was implemented for the textbox:
self.nameSuffix = ko.observable().extend({
maxLength: NineElevenRegistries.inputValidation.nameSuffixMaxLength,
pattern: NineElevenRegistries.inputValidation.name
});

You need to use an array for the values and store the value in an observable.
self.nameSuffixes = ko.observableArray([
{ options1: "Mr" },
{ options1: "Mrs" },
{ options1: "Miss" }
]);
self.nameSuffix = ko.observable();
And in your view -
<select id="d_name-suffix" style="width:auto; height:auto" data-bind="options: $root.nameSuffixes, value: nameSuffix, optionsText: 'options1'" />

So actually i figured out the solution to this problem. Instead of making Mr, Mrs etc as objects, i created string using the following array:
self.nameSuffixes = ko.observableArray([ "","Mr.","Mrs","Miss"]);
self.nameSuffix = ko.observable();

Knockout two-way bindings not working on checkbox

I have a form which generates a list options for the user, each option has a check-box, a label and an input field. The input field should only be shown whilst the check-box is ticked. The options are generated through a JSON call.
However, knockout doesn't seem to be doing what I would have expected when using the visible binding. When I check a row, the text box is correctly shown but when I uncheck it, the text box stays shown.
I suspect this is something to-do with the observable "selected" being overridden or something like that but I am stuck for ideas.
Here is a fiddle showing the issue: http://jsfiddle.net/qccQs/2/
Here is the HTML I am using in the fiddle:
<div data-bind="template: { name: 'reason-template', foreach: reasonList }"></div>
<script type="text/html" id="reason-template">
<div>
<input type="checkbox" data-bind="value: selected" />
<span data-bind="text: name"></span>
<input type="text" class="datepicker" data-bind="value: date, visible: selected" />
</div>
</script>
Here is the javascript that I am using in the fiddle:
function ReasonItem(name) {
this.name = ko.observable(name);
this.date = ko.observable(null);
this.selected = ko.observable(false);
};
function MyViewModel() {
var self = this;
self.reasonList = ko.observableArray([ ])
};
var vm = new MyViewModel();
new Request.JSON({
url: '/echo/json/',
data: {
json: JSON.encode({
data: [
{ name: "Reason 1", selected: false, date: null },
{ name: "Reason 2", selected: false, date: null },
{ name: "Reason 3", selected: false, date: null }
]
}),
delay: 0
},
onSuccess: function(response) {
$.each(response.data, function(index, reason) {
vm.reasonList.push(new ReasonItem(reason.name));
});
}
}).send();
ko.applyBindings(vm);
Any ideas on how I can get this to behave like I expected it to?

For inputs of checkbox type you need to use checked instead of value:
<input type="checkbox" data-bind="checked: selected" />
See Knockout Documentation.