How to use 'for' loop in velocity template?

Question

I just googled for 'for loop', but it looks like velocity has 'foreach' only.

How do I use 'for loop' in velocity template?

The best answer is bellow the fold, by @serg : http://stackoverflow.com/a/5683891/299843 — redben, Nov 12 '14 at 23:13

score 44 · Answer 1 · answered Apr 16 '11 at 01:35

44

Wanted to add that iteration information inside foreach loop can be accessed from special $foreach property:

#foreach ($foo in $bar)
    count: $foreach.count
    index: $foreach.index
    first: $foreach.first 
    last:  $foreach.last
#end

(last time I checked last contained a bug though)

answered Apr 16 '11 at 01:35

serg

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Exactly what I needed. I needed to write the index in my template. Thanks for this post! – Karthic Raghupathi May 26 '13 at 03:56
2

If you're stuck with Velocity 1.6 (f.e. as used by Confluence), only `$velocityCount` and `$velocityHasNext` are available (http://velocity.apache.org/engine/releases/velocity-1.6/user-guide.html#Loops) – sendmoreinfo Jun 17 '14 at 07:21
1

You can also get at these variables from within nested loops with `$foreach.parent.whatever` e.g. `$foreach.parent.parent.index` gets the index of the outer loop from within a triply nested foreach loop. – starwarswii Jul 25 '17 at 14:23

score 42 · Accepted Answer · answered Apr 16 '11 at 01:05

42

There's only #foreach. You'll have to put something iterable on your context. E.g. make bar available that's an array or Collection of some sort:

#foreach ($foo in $bar)
    $foo
#end

Or if you want to iterate over a number range:

#foreach ($number in [1..34])
    $number
#end

answered Apr 16 '11 at 01:05

WhiteFang34

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// Thanks! I don't understand why they don't have most basic loop! – Moon Apr 16 '11 at 01:06
5

foreach is the most basic kind of loop. for is an advanced one. – Nathan Bubna Apr 18 '11 at 16:05
Note that ranges in Velocity are inclusive, so that second example will loop 34 times, with `$number` going from 1 to 34. – starwarswii Jul 25 '17 at 14:25

score 8 · Answer 3 · answered Aug 31 '13 at 00:30

I found the solution when i was trying to loop a list. Put the list in another class and create getter and setter for the list obj. e.g

public class ExtraClass {
    ArrayList userList = null;

    public ExtraClass(List l) {
        userList = (ArrayList) l;
    }

    public ArrayList getUserList() {
        return userList;
    }

    public void setUserList(ArrayList userList) {
        this.userList = userList;
    }

}

Then for velocity context put the Extraclass as the input. eg.

  ExtraClass e = new ExtraClass(your list);
VelocityContext context = new VelocityContext();

context.put("data", e); Within template

#foreach ($x in $data.userList)
        $x.fieldname    //here $x is the actual obj inside the list
    #end

How to use 'for' loop in velocity template?

3 Answers3

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