How to iterate through an array of arrays in JSON using ng-repeat?

Question

I am trying to iterate over a JSON object userTypes.
For the below code:

In the 1st ng-repeat:
{{user.type}} outputs 'Parent'(as expected),
{{user.options}} outputs '[{"option1":"11QWERT","option2":"22QWERT"}]'(as expected).

But in the 2nd ng-repeat, I am not able to iterate through the user.options and output each of the {{options}}

What should be changed to get the option1 and option2 as the outputs in 2nd ng-repeat ?

JS snippet

var userTypes = [{
    "type": 'Parent',
    "options": [{
        "option1": "11QWERT",
        "option2": "22QWERT"
    }]
}]

HTML snippet

<li ng-repeat="user in userTypes">
    <p>{{user.type}}</p>
    <p>{{user.options}}</p>
    <li ng-repeat="option in user.options">
        <p>
            {{option}}
        </p>
    </li>
</li>

Artem Petrosian · Accepted Answer · 2015-05-06 07:46:43Z

11

Replace your child <li> with <ul> and then you can iterate user.options like so:

<li ng-repeat="user in userTypes">
    <p>{{user.type}}</p>
    <ul ng-repeat="(key, value) in user.options[0]">
        <p>{{key}}: {{value}}</p>
    </ul>
</li>

Or if your options may include more then one object:

<li ng-repeat="user in userTypes">
    <p>{{user.type}}</p>
    <ul ng-repeat="option in user.options">
        <li ng-repeat="(key, value) in option">{{key}}: {{value}}</li>
    </ul>
</li>

If you don't need object keys:

<ul ng-repeat="option in user.options">
    <li ng-repeat="item in option">{{item}}</li>
</ul>

Fiddle

Extended explanation:

In your example you have <li> tag inside another <li>:

<li ng-repeat="user in userTypes">
    <li ng-repeat="option in user.options">
    </li>
</li>

Since it is not a valid HTML browser will interprets this markup to following:

<li ng-repeat="user in userTypes">
</li>
<li ng-repeat="option in user.options">
</li>

Since ng-repeat creates new scope for each iteration you can't access user variable in second ng-repeat and iterator wouldn't run.

edited May 6, 2015 at 7:46

answered May 4, 2015 at 13:23

Artem Petrosian

2,9541 gold badge24 silver badges30 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

Artem Petrosian Over a year ago

@dreamer: because it is a valid HTML, otherwise browser will close first <li> tag automatically and you will lose your nested iteration

nikola-miljkovic · Accepted Answer · 2015-05-04 13:17:25Z

1

For this exact JSON input it should be like this:

<li ng-repeat="option in user.options">
    <p>
        {{option.option1}}
        {{option.option2}}
    </p>
</li>

However as you said you want non fixed number of options, update your JSON to be like this:

"options":["11QWERT","22QWERT"]

And then your code should work as you wanted it.

You can add each new element to list with simple coma before it.

edited May 4, 2015 at 13:17

answered May 4, 2015 at 13:11

nikola-miljkovic

6704 silver badges14 bronze badges

2 Comments

dreamer Over a year ago

the number of options in options is not fixed. so this cannot be used?

nikola-miljkovic Over a year ago

Your JSON input is bad then, it should be: "options":["11QWERT","22QWERT"] ill update answer.

Alhuck · Accepted Answer · 2015-05-04 13:58:59Z

1

Since user.options is an array you should loop it again. By doing that you will get an object, with that object you can access your options1 and option2 easily.

please refer working plunker:

http://embed.plnkr.co/5c3i5fY50jLP0fFgxkUX/preview

see through the code if you have any doubt.

Hope this helps

answered May 4, 2015 at 13:58

Alhuck

1,0298 silver badges11 bronze badges

1 Comment

dreamer Over a year ago

no , this cannot be used because, the number of options in user.options will vary, hence i cannot call it explicitly using options1 and options2

Anton Bielousov · Accepted Answer · 2015-11-20 18:30:05Z

1

A little aside, but just found out you can render a valid list HTML using ng-repeat-start/end in combination with ng-if="false" for the given array of arrays to flatten them:

<ul>
  <script ng-repeat-start="user in userTypes" ng-if="false"></script>
  <li ng-repeat="item in user.options">{{item}}</li>
  <script ng-repeat-end="" ng-if="false"></script>
</ul>

edited Nov 20, 2015 at 18:30

answered Nov 20, 2015 at 17:59

Anton Bielousov

1,9842 gold badges13 silver badges11 bronze badges

Comments

Michel · Accepted Answer · 2015-05-04 13:10:52Z

0

Just access the propertie of the option object in the second ng-repeat. Like option.option1

answered May 4, 2015 at 13:10

Michel

28.6k6 gold badges67 silver badges72 bronze badges

2 Comments

dreamer Over a year ago

the number of options in options is not fixed. so this cannot be used

Michel Over a year ago

This solution doesn't depends on the length of the options collection. I guess your structure should be reworked.

a h · Accepted Answer · 2015-05-04 13:19:14Z

0

You should probably make your user.options an object and not an array containing a single object.

Note the difference between these:

[{"option1":"11QWERT","option2":"22QWERT"}]
 {"option1":"11QWERT","option2":"22QWERT"}

You can then iterate the options with an ng-repeat like discussed here:

<li ng-repeat="(key, value) in user.options">
    <p>{{ key }}: {{ value }}</p>
</li>

edited May 4, 2015 at 13:19

answered May 4, 2015 at 13:13

a h

1532 silver badges8 bronze badges

Collectives™ on Stack Overflow

How to iterate through an array of arrays in JSON using ng-repeat?

6 Answers 6

1 Comment

2 Comments

1 Comment

Comments

2 Comments

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

6 Answers 6

1 Comment

2 Comments

1 Comment

Comments

2 Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related