Utilizing Angular directives to trigger functions within nested child directives

Question

Utilizing Angular directives to trigger functions within nested child directives

Seeking guidance on implementing a hierarchical structure in Angular, where a directive (<partition>) can trigger a method on a child directive's controller (<property-value>).

Sample example provided:
https://jsfiddle.net/95kjjxkh/1/

The code includes an outer directive, <partition>, containing one or more <property-value> directives.

The <property-value> directive has an editing method, editItem(), enabling users to modify entries. A random number is assigned in the current example, but typically a modal would prompt for new values in production.

While this setup works well, I aim to allow the outer directive, <partition>, to create and trigger the editing method of a new <property-value> directive immediately for user input. If no initial value is entered, the new item should be removed.

I've come across instances of inner directives invoking methods on their enclosing directives, but not vice versa.

Is there a way to achieve this interaction? Alternatively, would you recommend a different approach for constructing this view?

javascript angularjs angularjs-directive parent-child

Answer 1

Answer №1

Utilize $broadcast for bidirectional communication, enabling you to communicate with both your parent and children.

Answer 2

Utilize $broadcast for bidirectional communication, enabling you to communicate with both your parent and children.

Answer 3

Answer №2

If you're working in your Child controller, consider implementing the following:

  app.directive('propertyValue', function() {
return {
    require : '^partition'
    restrict: 'E',
    scope: {
        item: '='
    },

This setup allows you to access the parent controller within the child directive's link function like so:

link:function(scope,element,attrs,partitionCtrl){
  partitionCtrl.getChildCtrl(element)
  }

In the partition controller, create a getChildCtrl function that calls the "propertyvalue" controller function:

 controller: function ($scope, ItemFactory) {
 // your code
var propValueCtrl =undefined;
 this.getChildCtrl =function(elem)
 {
   propValueCtrl = elem.controller();
 }
 this.callChildFunction = function()
 {
    propValueCtrl.Edit();// whatever is the name of function
 }

Invoke this function as necessary within the property link function.

I trust this explanation proves beneficial.

Answer 4

If you're working in your Child controller, consider implementing the following:

  app.directive('propertyValue', function() {
return {
    require : '^partition'
    restrict: 'E',
    scope: {
        item: '='
    },

This setup allows you to access the parent controller within the child directive's link function like so:

link:function(scope,element,attrs,partitionCtrl){
  partitionCtrl.getChildCtrl(element)
  }

In the partition controller, create a getChildCtrl function that calls the "propertyvalue" controller function:

 controller: function ($scope, ItemFactory) {
 // your code
var propValueCtrl =undefined;
 this.getChildCtrl =function(elem)
 {
   propValueCtrl = elem.controller();
 }
 this.callChildFunction = function()
 {
    propValueCtrl.Edit();// whatever is the name of function
 }

Invoke this function as necessary within the property link function.

I trust this explanation proves beneficial.

Utilizing Angular directives to trigger functions within nested child directives

Answer №1

Answer №2

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