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I would like to hide the built in quantity box based on whether i have set a custom attribute for quantity. Some products that dont have a custom attribute for quantity will need to still display the quantity box. I'd like this for everywhere the quantity box is shown, but most importantly and where i am currently trying to get it to work is the product page. For example, one of the products i will have is business cards. I will have a price per each variant (material, number of sides, quantity, lamination etc) which i can create using the custom attributes and this part works fine.

I cannot work out how to do the checking for the custom attribute called quantity. I have tried various things and when i do a var_dump of the variable i just get "NULL" and im not sure where i am going wrong. I am using Magento 2.3 and i am editing the addtocart.phtml template file, which i was hoping to just add an if statement to not show the qty div if it returned true.

The code i have last tried is:

<?php $myquantity = $_product->getCustomAttribute('quantity'); ?>

and when i do a var_dump i just get NULL.
The full addtocart.phtml code is with the only changes are the line above and the var_dump line:

<?php $_product = $block->getProduct(); ?>

<?php $myquantity = $_product->getCustomAttribute('quantity'); ?>

<?php $buttonTitle = __('Add to Cart'); ?>

<?php if ($_product->isSaleable()): ?>

<div class="box-tocart">

    <div class="fieldset">

        <?php if ($block->shouldRenderQuantity()): ?>

        <div class="field qty">

        <?php var_dump($myquantity); ?>

            <label class="label" for="qty"><span><?= /* @escapeNotVerified */ __('Qty') ?></span></label>

            <div class="control">

                <input type="number"

                       name="qty"

                       id="qty"

                       value="<?= /* @escapeNotVerified */ $block->getProductDefaultQty() * 1 ?>"

                       title="<?= /* @escapeNotVerified */ __('Qty') ?>"

                       class="input-text qty"

                       data-validate="<?= $block->escapeHtml(json_encode($block->getQuantityValidators())) ?>"

                       />

            </div>

        </div>

        <?php endif; ?>

        <div class="actions">

            <button type="submit"

                    title="<?= /* @escapeNotVerified */ $buttonTitle ?>"

                    class="action primary tocart"

                    id="product-addtocart-button">

                <span><?= /* @escapeNotVerified */ $buttonTitle ?></span>

            </button>

            <?= $block->getChildHtml('', true) ?>

        </div>

    </div>

</div>

<?php endif; ?>

<script type="text/x-magento-init">

    {

        "#product_addtocart_form": {

            "Magento_Catalog/js/validate-product": {}

        }

    }

</script>

I am only at the checkign phase so far, i didnt see the point in trying to write the if statement when i can't return the right information first.
Of course, if there is another/better way i can do this i would appreciate the help. I am not much of a developer so i was hoping for a simple resolution.

Thanks

If issue is related to get attribute value, You can use:

<?php $myquantity = $_product->getQuantity(); ?>



----------OR----------



<?php $myquantity = $_product->getAttributeText('quantity'); ?> 

once you have value of $myquantity, you can put your logic.

Hope above will help!