How to check the size of list in sightly?

Dinu_Arya

15-10-2015

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Actual Post:

Hi,

I need to check size of the list in sightly. I need to display UI only when it has more than 2 items in list. Any idea?

Thanks,

Arya.

Accepted Solutions (1)

Accepted Solutions (1)

Answers (11)

Answers (11)

Feike_Visser1

Employee

15-10-2015

hi arya,

You can just the methods from the object, whether that is List, Array etc.

So if you have .size(), you can use .size. If you have .length() or .count(). You can use .length or .count.

Hope this helps.

Inside your list, you can use things like ${itemList.count}, but this only works inside data-sly-list:

<ul data-sly-list="${currentPage.listChildren}">

<li>${item.name} Page ${itemList.index} of ${itemList.count}</li>

</ul> 

--
Feike

mattm65985934

06-09-2016

This answer is no longer valid. As far as I can tell, the only way to accomplish this is to create another method in the initialized bean that returns the size of the list.

hemantbellani-O

18-09-2017

// The WCMUse class' method that gives me an ArrayList

public List<String> getAllColumns() {

  List<String> allColumns = new ArrayList<String>();

  for (int i = 1; i <= 10; i++) {

    allColumns.add("Test" + "-" + i);

  }

  return allColumns;

  }

 

  # sightly code that I am trying out ....

<sly data-sly-list.myList="${myWCMUseObject.allColumns}">

  <div data-sly-test="${myList.size > 5}" data-sly-unwrap>

  Heloo!!!!!

        </div>

</sly>

hemantbellani-O

15-09-2017

Hi Felke.

On trying the snippet as below:

    <div data-sly-test="${myList.size > 5}" data-sly-unwrap>

  Heloo!!!!!

        </div>

We get an error as:

Invalid types in comparison. Comparison is supported for Number types only.

Could you please throw some light on why this could be the case?

Thanks,

Hemant Bellani

Tyler_Maynard

19-01-2017

I also find it very helpful to use the Ternary Operator in conjunction with the size/length to optionally add classes to an element. Just another front-end tip.

<div class="image-grid-item ${(properties['imageTiles'].length > 3 && rowList.count == 3 ) ? 'image-grid-item_bigger' : ''}"> </div>

Dinu_Arya

15-10-2015

Hi Feike,

Thanks. I have gone through sightly tutorials. But I didn't find this attribute. Actually we have size() for java.util.ArrayList. Can I use all of List methods like mylist.<ListMethod> ? Where can I find these tutorials? I have seen only count,first,last,index etc.

 

Thanks,

Arya.