# Manipulating objects inside for loop

**URL:** <https://community.hubspot.com/t/manipulating-objects-inside-for-loop/119478>\
**Category:** CMS Development\
**Tags:** hubdb\
**Created:** [October 30, 2024, 7:38am UTC](https://community.hubspot.com/t/manipulating-objects-inside-for-loop/119478 "2024-10-30T07:38:25Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![EnriAlea](https://d10pqhm3lwygmk.cloudfront.net/user_avatar/community.hubspot.com/enrialea/32/77566_2.png) [@EnriAlea](https://community.hubspot.com/u/EnriAlea)\
**Post date:** [October 30, 2024, 7:38am UTC](https://community.hubspot.com/t/manipulating-objects-inside-for-loop/119478/1 "2024-10-30T07:38:25Z")

</div>

Hello,

I’m struggling with these two cases, inside nested loops I can’t update directly the object, nor checking for the array that I’m populating.  
Note that ALL\_PRODUCTS, ALL\_VARIANTS, ALL\_SKU are all HubDb table rows.

Are there any workaround? I need to update the top object in the hierarchy, based on properties that are present in nested children objects.

```lia-code-sample
{% set PRODUCTS = [] %}
{% for product in ALL_PRODUCTS %}
 {% for v in ALL_VARIANTS %}
 {% if v.idproduct == product.id_ls %}
 {% for s in ALL_SKU %}
 {% if s.idvariant == v.id_ls and s.publishing != 'n' %}
 {# TRYING TO UPDATE DIRECTLY THE OBJECT I'M LOOPING THROUGH, DOESN'T WORK #}
 {% do product.update({'batterie_input': s.batterie_input}) %}

 {% do PRODUCTS.append(product) %}

 {# TRYING TO CHECK THE UPDATED ARRAY AFTER APPEND, DOESN'T WORK, IT ONLY WORKS AFTER THE LOOP HAS FINISHED #}
 {{ PRODUCTS }}
 {% endif %}
 {% endfor %}
 {% endif %}
 {% endfor %}
{% endfor %}

```

---

<div class="post-metadata">

**Author:** ![Jaycee\_Lewis](https://d10pqhm3lwygmk.cloudfront.net/user_avatar/community.hubspot.com/jaycee_lewis/32/61352_2.png) [@Jaycee\_Lewis](https://community.hubspot.com/u/Jaycee_Lewis)\
**Post date:** [October 30, 2024, 4:25pm UTC](https://community.hubspot.com/t/manipulating-objects-inside-for-loop/119478/2 "2024-10-30T16:25:30Z")

</div>

Hey, @EnriAlea 👋 This is the expected outcome based on how HubL doesn’t allow direct updates on objects inside loops. Have you looked into:

- Creating a temporary copy, e.g. `product_copy` to update in the nested loops
- Use `merge` to ass properties
- Append `product_copy` to PRODUCTS outside your inner loops

If you’ve already gone down this road, please let me know, and we can try tagging in a few champions who have HubL experience.

Thanks! — Jaycee

---

<div class="post-metadata">

**Author:** ![GiantFocal](https://d10pqhm3lwygmk.cloudfront.net/user_avatar/community.hubspot.com/giantfocal/32/41969_2.png) [@GiantFocal](https://community.hubspot.com/u/GiantFocal)\
**Post date:** [October 31, 2024, 6:26am UTC](https://community.hubspot.com/t/manipulating-objects-inside-for-loop/119478/3 "2024-10-31T06:26:07Z")

</div>

Hi @EnriAlea,

When working with nested loops in HubL, there are two main limitations:

1. Direct object updates inside loops are not supported
2. Array checks during loop iteration are not possible until after the loop completes

To work around these limitations, you can try:

1. Create new objects instead of modifying existing ones
2. Collect all necessary data first, then process it outside the loops
3. Use intermediate arrays to store temporary results

For example:

```lia-code-sample
{% set PRODUCTS = [] %}
{% set temp_product = {} %}
{% for product in ALL_PRODUCTS %}
 {% do temp_product.update(product) %}
 {# Collect modifications in temporary object #}
 {% do PRODUCTS.append(temp_product) %}
{% endfor %}

```

---

<div class="post-metadata">

**Author:** ![EnriAlea](https://d10pqhm3lwygmk.cloudfront.net/user_avatar/community.hubspot.com/enrialea/32/77566_2.png) [@EnriAlea](https://community.hubspot.com/u/EnriAlea)\
**Post date:** [October 31, 2024, 3:15pm UTC](https://community.hubspot.com/t/manipulating-objects-inside-for-loop/119478/4 "2024-10-31T15:15:55Z")

</div>

Hi!

your suggestion does the trick, but I have to create the temp object inside the first loop.

Thx!

Enrico