I want to remove element from firebase using javascript

Question

I'm trying to understand how to remove an item from my Firebase. I've set up a function (saveEmployee) to create an item , but can't figure out how to go about removing an item.

HTML

<tbody ng-repeat="employee in employees"> 
            <tr>
                <td>{{employee.employeeName}}</td>
                <td>{{employee.employeeAge}}</td>
                <td><a class="btn btn-danger" ng-click="removeEmployee(employee.employeeName)" >Delete</a></td>
            </tr>
        </tbody>

JS

$scope.removeEmployee = function(employeeName) {
        console.log(employeeName);
        $scope.myData.child(employeeName).remove();
    };

no one have answer

Semah Mhamdi
– Semah Mhamdi

2016-06-04 22:20:01 +00:00
Commented Jun 4, 2016 at 22:20 — Semah Mhamdi
– Semah Mhamdi, Commented Jun 4, 2016 at 22:20
probably not on the weekend.

Gregg
– Gregg

2016-06-04 22:25:45 +00:00
Commented Jun 4, 2016 at 22:25 — Gregg
– Gregg, Commented Jun 4, 2016 at 22:25

Gregg · Accepted Answer · 2016-06-04 22:52:12Z

1

Use Firebase.set() and pass in null. This will delete the employee.

$scope.removeEmployee = function(employeeId) {
   var employeeRef = new Firebase('https://myfirebaseurl.firebaseio.com/employees/' + employeeId);
   employeeRef.set(null);
};

or with a callback handler.

$scope.removeEmployee = function(employeeId) {
   var employeeRef = new Firebase('https://myfirebaseurl.firebaseio.com/employees/' + employeeId);
   employeeRef.set(null, function(error) {
       if (error) {
           console.log(error);
       } else {
           console.log('Employee deleted.');
       }
   });
};

edited Jun 4, 2016 at 22:52

answered Jun 4, 2016 at 22:25

Gregg

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16 Comments

Semah Mhamdi Over a year ago

not working because the employeRef is like "firebaseurl.firebaseio.com/Employee/-KJSFx_NJCdaJqusmL6S/employeeName" and i can't know the generated id

Gregg Over a year ago

You cant know the generated id, why not? Once you create the new record in firebase, the generated ID is passed back via the ref.

Semah Mhamdi Over a year ago

there is no error it say employee deleted and there is no change in firebase

Gregg Over a year ago

Are you using the firebase dashboard to monitor the changes? If so, you will not see updates when at the root level and have nodes expanded. The new firebase dashboard requires you to click into a child node to see the updates in real time. Not sure why this is the case. Or at least this is the case for me. For example, click into the employees node and see if the record still exists. If so try deleting it again to see if it is removed.

Semah Mhamdi Over a year ago

First argument must be a valid firebase URL and the path can't contain ".", "#", "$", "[", or "]".

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