How to iterate over the keys and values with ng-repeat in AngularJS?
In my controller, I have data like: $scope.object = data
Now this data is the dictionary with keys and values from json.
I can access the attribute with object.name in the template. Is there any way that I can iterate over the keys as well and display them in table like
<tr><td> {{key}} </td> <td> data.key </td>
The data is like this
{
"id": 2,
"project": "wewe2012",
"date": "2013-02-26",
"description": "ewew",
"eet_no": "ewew",
}
How about:
<table>
<tr ng-repeat="(key, value) in data">
<td> {{key}} </td> <td> {{ value }} </td>
</tr>
</table>
This method is listed in the docs: https://docs.angularjs.org/api/ng/directive/ngRepeat
If you would like to edit the property value with two way binding:
<tr ng-repeat="(key, value) in data">
<td>{{key}}<input type="text" ng-model="data[key]"></td>
</tr>
ng-model="value"?
ng-repeat is essentially iterating over the object and returning key-value pairs. Think of it like for(var value in arrayOfValues) { ... }. If you re-assign the variable value inside your loop, you are not changing what is inside of arrayOfValues, you are just re-pointing value to a new object.
I don't think there's a builtin function in angular for doing this, but you can do this by creating a separate scope property containing all the header names, and you can fill this property automatically like this:
var data = {
foo: 'a',
bar: 'b'
};
$scope.objectHeaders = [];
for ( property in data ) {
$scope.objectHeaders.push(property);
}
// Output: [ 'foo', 'bar' ]
we can follow below procedure to avoid display of key-values in alphabetical order.
Javascript
$scope.data = {
"id": 2,
"project": "wewe2012",
"date": "2013-02-26",
"description": "ewew",
"eet_no": "ewew",
};
var array = [];
for(var key in $scope.data){
var test = {};
test[key]=$scope.data[key];
array.push(test);
}
$scope.data = array;
HTML
<p ng-repeat="obj in data">
<font ng-repeat="(key, value) in obj">
{{key}} : {{value}}
</font>
</p>
A todo list example which loops over object by ng-repeat:
var app = angular.module('toDolistApp', []); app.controller('toDoListCntrl', function() { var self = this; self.toDoListItems = {};// []; //dont use square brackets if keys are string rather than numbers. self.doListCounter = 0; self.addToDoList = function() { var newToDoItem = {}; newToDoItem.title = self.toDoEntry; newToDoItem.completed = false; var keyIs = "key_" + self.doListCounter++; self.toDoListItems[keyIs] = newToDoItem; self.toDoEntry = ""; //after adding the item make the input box blank. }; }); app.filter('propsCounter', function() { return function(input) { return Object.keys(input).length; } });
Enter todo Item: {{toDoListCntrlAs.toDoEntry}}
Complete example here:-
<!DOCTYPE html >
<html ng-app="dashboard">
<head>
<title>AngularJS</title>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.2.4/jquery.min.js"></script>
<link rel="stylesheet" href="./bootstrap.min.css">
<script src="./bootstrap.min.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.4.4/angular.min.js"></script>
</head>
<body ng-controller="myController">
<table border='1'>
<tr ng-repeat="(key,val) in collValues">
<td ng-if="!hasChildren(val)">{{key}}</td>
<td ng-if="val === 'string'">
<input type="text" name="{{key}}"></input>
</td>
<td ng-if="val === 'number'">
<input type="number" name="{{key}}"></input>
</td>
<td ng-if="hasChildren(val)" td colspan='2'>
<table border='1' ng-repeat="arrVal in val">
<tr ng-repeat="(key,val) in arrVal">
<td>{{key}}</td>
<td ng-if="val === 'string'">
<input type="text" name="{{key}}"></input>
</td>
<td ng-if="val === 'number'">
<input type="number" name="{{key}}"></input>
</td>
</tr>
</table>
</td>
</tr>
</table>
</body>
<script type="text/javascript">
var app = angular.module("dashboard",[]);
app.controller("myController",function($scope){
$scope.collValues = {
'name':'string',
'id':'string',
'phone':'number',
'depart':[
{
'depart':'string',
'name':'string'
}
]
};
$scope.hasChildren = function(bigL1) {
return angular.isArray(bigL1);
}
});
</script>
</html>
Use below code it is working to display your key and value here is key start with 1:
<tr ng-repeat="(key,value) in alert_list" >
<td>{{key +1}}</td>
<td>{{value.title}}</td>
</tr>
Below is document link for it.
https://docs.angularjs.org/api/ng/directive/ngRepeat
You can do it in your javascript (controller) or in your html (angular view)...
js:
$scope.arr = [];
for ( p in data ) {
$scope.arr.push(p);
}
html:
<tr ng-repeat="(k, v) in data">
<td>{{k}}<input type="text" ng-model="data[k]"></td>
</tr>
I believe the html way is more angular , but you can also do in your controller and retrieve it in your html...
also not a bad idea to look at the Object keys, they give you the an array of the keys if you need them, more info here:
https://developer.mozilla.org/en/docs/Web/JavaScript/Reference/Global_Objects/Object/keys
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ngRepeat. In fact, I once heard a core team member regret ever implementing the ability to do so! It's usually better to transform the object in the controller to an array; this makes the intent clearer and decreases the risk for strange/unpredictable behavior in certain cases. And you can sort in the usual way. :-)Object.getOwnPropertyNames(data).map(k => ({key:k, value:data[k]));.