I'm building a SPA based on AngularJS. In one component of the SPA I have a document upload system, which is built via a custom directive below called docmgmt. Within the component docmgmt I have an another custom directive component called modalCompanyQuery. It is a modal window that searches the company database and returns matching company results. Upon the finding the right company the user clicks on the company name which is then passed back to the parent directive docmgmt called modalOutput.
The issue I have is that despite using two way binding '=' a new scope for modalOutput (output) is created in modalCompanyQuery. How can I pass the modalCompanyQuery search result (modalOutput) back to the parent directive docmgmt? Any help on the simplest way to return the results would be great. Thank you in advance!
Here is my code simplified
modalCompanyQuery Template
<div modal-company-query dialog-show="modalCompanyQuery.isShow" dialog-name ="Select Company" dialog-class="modalSelectCompany" dialog-icon ="fa fa-building" dialog-header="modalSelectCompany-header" company-type = "srchCompanyTypeList" output-select="modalOutput">
</div>
Directive docmgmt
angular.module("docmgmt", [])
.directive("docmgmt",['$http','sessionService','Upload','docService', function($http,sessionService,Upload,docService){
return{
link: function(scope,element,attrs){
scope.docRecord = {};
scope.rightPane = {showAction:true, showInsert:false,showUpdate:false, showRead:false};
scope.progressBar = 0;
scope.submit =[{}];
//modal company search and linking search output results to docmgmt scope
scope.modalCompanyQuery = {isShow:false};
scope.modalOutput={};
scope.test=function(){
console.log(scope.modalOutput);
}
},//return
restrict:"A",
replace:true,
templateUrl:"partials/docmgmt/docmgmt.html",//template
transclude:true,
scope:{
}
}//return
}]);
Directive modalCompanyQuery
angular.module("company", [])
.directive("modalCompanyQuery",['$http','companyService', function($http,companyService){
return{
link: function(scope,element,attrs){ // normal variables rather than actual $scope, that is the scope data is passed into scope
//Read Company
scope.getRecord = function(result){
scope.output={id:result.cs_id, type:result.type,name:result.name, active: result.active};
console.log(scope.output);
scope.isShow = false;
}//getRecord
/*AJAX search functions go here*/
},//return
restrict:"A", //assign as attribute only ie <div my-modal> Content </div>
replace:true,//replaces div with element, note if this is the case must all template must be wrapped within one root element. eg button is within ul otherwise get an error.
templateUrl:"partials/company/tpl/desktop/modal-company-query-desktop.html",//template
transclude:true, //incorporate additional data within
scope:{
isShow:"=dialogShow",//two way binding
name:"#dialogName",//name to be in header
dialogClass:"#dialogClass",// style of the dialog
dialogHeader:"#dialogHeader",//color of the dialogHeader
dialogIcon:"#dialogIcon",//font awesome icon
output:"=outputSelect"
//selectCompany:"=selectCompany",//company to be selected from search and passed back to main window
} //If on this should mean the html input is not binded to custom directive
}//return
}]);
alright, in your docmgmt directive, I see you have made the scope of the directive empty doing:
scope: {}.
I think you should do it like:
scope: {
modalOutput: "="
}
btw doing above expects an attribute in your directive template with name modal-output which must be an object type.
Try it...
After some research I found the solution. The following two links really helped me understand the problem and solution.
Understanding $emit, $broadcast and $on in AngularJS
Communication between nested directives
So I end up using $emit and $on. Outcome as follows:
Directive modalCompanyQuery
scope.getRecord = function(result){
scope.output={id:result.cs_id, type:result.type,name:result.name, active: result.active};
scope.$emit('companyRecord', {record:scope.output});
scope.isShow = false;
}//getRecord
Directive docmgmt
scope.$on('companyRecord', function (event, args) {
scope.modalOutput = args.record;
console.log('Success');
console.log(scope.modalOutput);
});
Hope this helps other people that have come across the same brickwall!
Related
Thanks in advance for taking the time to look into this question
I have serverside generated code that renders a directive wrapped around pre-rendered content.
<serverside-demo color="blue">
<p><strong>Content from Server, wrapped in a directive.</strong></p>
<p>I want this color to show: <span ng-style="{color: color}">{{color}}</span></p>
<button ng-click="onClickButtonInDirective()">Click Me</button>
</serverside-demo>
This means that 1.) the directive tag, 2.) the content inside the directive tag, 3.)the ng-click and 4.) The curly braces syntax are all generated by the server.
I want AngularJs to pick up the generated code, recompile the template and deal with the scope.
The problem is that I am having trouble getting it working. I understand that because the ng-click is inside the controller block, it is picked up not by the directive isolated scope, but the parent controllers. Instead I want the opposite... to pick up the onClickButtonInDirective scope function inside the serversideDemo link
I have created a jsfiddle best explaining my problem, which aims to clearly demonstrate the working "traditional" way of loading the template separately (which works) comparing it to the server-side way.
https://jsfiddle.net/stevewbrown/beLccjd2/3/
What is the best way to do this?
Thank you!
There are two major problem in your code
1- directive name and dom element not matched, - missing in dom element
app.directive('serverSideDemo', function() {
use <server-side-demo color="blue"> instead of <serverside-demo color="blue">
2- you need to compile the html code of server-side-demo dom with directive scope in link function
$compile(element.contents())(scope);
Working jsfiddle
Use templateUrl instead of template to fetch the content of directive from server:
app.directive('serverSideDemo', function() {
return {
restrict: 'AE',
scope: {
color: '='
},
templateUrl: 'link/that/returns/html/content',
link: function(scope, element, attrs) {
scope.onClickButtonInDirective = function() {
console.log('You clicked the button in the serverside demo')
scope.color = scope.color === 'blue' ? 'red' : 'blue';
}
}
};
});
Have a look at angular docs for more details
I'm trying to figure out how to include scope with a directive that I add to the dom on a click event in a controller.
Step 1. On a click event, I call a function in my controller that adds a directive like this
$scope.addMyDirective = function(e, instanceOfAnObjectPassedInClickEvent){
$(e.currentTarget).append($compile("<my-directive mydata='instanceOfAnObjectPassedInClickEvent'/>")($scope));
}
//I'm trying to take the `instanceOfAnObjectPassedInClickEvent` and make it available in the directive through `mydata`
The above, part of which I got from this SO answer, successfully adds the directive (and the directive has a template that gets added to the dom), however, inside the directive, I'm not able to access any of the scope data mydata it says it's undefined.
My directive
app.directive('myDirective', function(){
return {
restrict: 'AE',
scope: {
mydata: '='
//also doesn't work if I do mydata: '#'
},
template: '<div class="blah">yippee</div>',
link: function(scope,elem,attrs) {
console.log(scope) //inspecting scope shows that mydata is undefined
}
}
}
Update
I changed the name of datafromclickedscope in the OP to make it more clear. In the controller action addMyDirective (see above) instanceOfAnObjectPassedInClickEvent is an instance of an object passed into the controller method on a click event that I try to pass into the directive as mydata='instanceOfAnObjectPassedInClickEvent'. However, even if I change = to # in the directive and I try to access scope.mydata in the link function of the directive, it just shows a string like this "instanceOfAnObjectPassedInClickEvent", not the actual object data that is available to me in my method that handles the click event
When you use mydata='instanceOfAnObjectPassedInClickEvent' in a template you need instanceOfAnObjectPassedInClickEvent to defined in $scope. So before compiling you should assign a variable in $scope. I will rename this variable in code below, so that same names would not confuse you and it would be clear that a formal parameter of a function cannot be visible in a template.
$scope.addMyDirective = function(e, instanceOfAnObjectPassedInClickEvent){
$scope.myEvent = instanceOfAnObjectPassedInClickEvent;
$(e.currentTarget).append($compile("<my-directive mydata='myEvent'/>")($scope));
}
EDIT: slightly adapted jsfiddle not using JQuery no manipulate DOM
I have a form with a ton of duplicate functionality in 2 different Controllers, there are slight differences and some major ones in both.
The form sits at the top of a products view controller, but also inside of the products modal controller.
Test plunker: http://plnkr.co/edit/EIW6xoBzQpD26Wwqwwap?p=preview
^ how would you change the string in the console.log and the color of the button based on parent scope?
At first I was going to create a new Controller just for the form, but also the HTML was being duplicated, so decided to put that into a Directive, and just add the Controller code there.
My question now is this: How would I determine which parent scope the form-directive is currently being viewed in? Because depending on the parent scope the functions/methods behave differently.
So far I've come up with this:
.directive('productForm', function() {
return {
templateUrl: "views/products/productForm.html",
restrict: "E",
controller: function($scope) {
console.log('controller for productForm');
console.log($scope);
console.log($scope.$parent);
/*
If parent scope is the page, then this...
If parent scope is the modal then this instead...
*/
}
}
});
However it's giving me back $parent id's that look like 002 or 00p. Not very easy to put in if / else statements based on that information.
Have you guys run into this issue before?
You can define 'saveThis' in your controller and pass it to directive using '&'
scope: {
user: '=',
saveThis : '&'
},
please see demo here http://plnkr.co/edit/sOY8XZtEXLORLmelWssS?p=preview
That gives you more flexibility, in future if you want to use saveThis in another controller you can define it inside controller instead adding additional if statement to directive.
You could add two way binding variables in the directive scope, this allows you to specify which Ctrl variable gets bound to which directive variable
<my-directive shared="scopeVariable">
this way you achieve two way binding of the scopeVariable with the shared directive variable
you can learn more here
I advice against this practice and suggest you to isolate common logics and behaviours in services or factories rather than in directives
This is an example of a directive that has isolated scope and shares the 'title' variable with the outer scope.
You could declare this directive this way:
now inside the directive you can discriminate the location where the directive is defined; just replace the title variable with a location variable and chose better names.
.directive('myPane', function() {
return {
restrict: 'E',
scope: {
title: '#'
},
link: function(scope, element, attrs, tabsCtrl) {
},
templateUrl: 'my-pane.html'
};
});
I have a directive which consists of a form text element and a continue button along with the associated controller etc. This directive is going to be used in about 5 different pages, but on each page it is used the continue button will do something different.
My question is where can/should I put the code for the continue button if it does different things for each page?
Since its a directive I cant simply pass a different function into ng-click depending on what page im on (ie, if i simply replicated the code on each page it is used I could simply change the function called on ng-click and have that function in each of the page controllers.
Hopefully Im not being too vague with my question and you can make sense of what im asking. If not just say so and ill try to explain in more detail.
I would really appreciate some guidance on this matter.
Thanks.
There are two ways that you can do it. If you are creating your directive as a true component you can use isolated scope with & binding that binds to an expression.
Assume your directive looks like
<div do-work on-click="save()"></div>
and the generated html
<div>
<input ...>
<button ng-click="doAction()"><button>
</div>
The directive scope will be defined
scope:{
onClick:'&'
}
In your directive controller or link function you need to implement the button doAction, which in turns evaluates the onClick action
scope.doAction=function() {
scope.onClick({//if params are required});
}
Now you have linked the parent through the direct onClick reference. One thing to remember here is that this creates a directive with isolated scope.
In case you do not want isolated scope created you need to use
scope.$eval(attr.onClick); // this evaluates the expression on the current scope.
Hope this helps.
Ideally you should not create directives which are not re-usable.
In your case, you may do it like following -
create an isolated scope in the directive
add a function to be called and pass the page/ page id as parameter
call functions in controller based on parameter
Directive
myApp.directive('someDirecive', function () {
return {
// restrict options are EACM. we want to use it like an attribute
restrict: 'A',
// template : <inline template string>
// templateUrl = path to directive template.
// templateUrl: '',
scope: {
onButtonClick : '&'
},
controller: function ($scope, $element, $attrs, $transclude) {
$scope.onButtonClick = function(pageId) {
if (pageId == 1) {
// do something
}
else if (pageId == 2) {
// do something
}
}
},
//link: function (scope, iElement, iAttrs) {
//}
};
});
HTML
<div some-directive on-button-click="DoSomething(1)" />
I have a simple Angular Problem - I think it's probably a case of can't see the wood for the trees here.
I have an input field with a directive attached. The purpose is eventually to compare new with old data and show a popup. However, as soon as I add the directive attribute to the input field, the value disappears:
Plunk here: http://plnkr.co/edit/BQvKGe6kjuD0ThPBYJ4d?p=preview
HTML:
First Name:
<input type='text' ng-model='currentEditItem.strFirstName' name='strFirstName' id='strFirstName'
cm-popover="currentEditItem.personOldData.strFirstName"/>
<br><br>
ngModel: {{currentEditItem.strFirstName}} <br>
cmPopover: {{currentEditItem.personOldData.strFirstName}}
JS
var app = angular.module('app', []);
app.controller('Ctrl', function ($scope) {
$scope.currentEditItem = {};
$scope.currentEditItem.strFirstName = "Bob";
$scope.currentEditItem.personOldData = {};
$scope.currentEditItem.personOldData.strFirstName = "Roger";
});
app.directive("cmPopover", function () {
return {
scope: {
ngModel: "=",
cmPopover: "="
},
link: function (scope, elem, attrs) {
console.log("ngModel", scope.ngModel);
console.log("cmPopover", scope.cmPopover);
}
}
});
If you go to the Plunk and remove the cm-popover attribute, the input field is filled with the value from the model. When the attribute is added the value disappears although the model is still in the scope with the correct value.
In your directive you declare an isolate scope. This input's scope is now this isolate scope since it's the directive element. It's looking for the currentEditItem object which doesn't exist in the isolate scope
ngModel does not create a new isolated scope for itself so it can $watch without having to hardcode a $parent in it's internal code.
But then you add another directive on the same DOM node that creates an isolated scope for itself. Couple this with the fact that you can only have a single isolated scope on a DOM node and you basically force ngModel to use/work with the same scope cmPopover created.
So when writing ng-model="currentEditItem.strFirstName" you are actually addressing the $scope inside the cmPopover directive, no the one in the (parent) controller. You can check this is the case by using ng-model="$parent.currentEditItem.strFirstName" - and it will work.
There's quite a lengthy conversation here with a lot of possible workarounds and solutions that leads to an actual fix in release 1.2.0.
So long story short: update to at least AngularJS 1.2.0 and this will work.