Dynamic Product

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Common cases ​

Here are some common cases that many merchants encounter. It can be a simpler way to get you started with the module.

Each feature will have a link to the corresponding documentation page. You can find more detailed information there.

You can also find many product examples in the examples demo

Examples ​

Charge a price based on a product area ​

Create a width and height field then configure this price formula for example:

js
[width] * [height] * 10

But in most cases, the fields are in centimeters, so you need to convert them to meters:

js
[width] * [height] / 10000 * 10

In this case, you are charging 10€ for each square meter.

TIP

In the docs, Euros are used, but it depends on your shop's default currency.

You can even create a dynamic variable field called area and assign the area to it using a field formula.

Then you can use this variable in the price formula:

js
[area] = [width] * [height] / 10000

Then the price formula becomes:

js
[area] * 10

Add an extra cost based on a selected option ​

You can create a dropdown field called material with options like:

  • Metal
  • Wood
  • Plastic

Then you can assign a value to each option of the dropdown and use the field directly in the price formula:

js
[material]

The field value will be replaced by the value of the selected option.

So it will be easy to add many options like this

js
[material] + [color] + [size] // etc...

You can even charge based on the area and material like this

js
[area] * [material]

Add extra cost based on a checkbox ​

You can create a checkbox field called gift_wrap for example.

Then you can use it in the price formula like this:

js
[gift_wrap] * 5

or you can use the IF function to add a cost only if the checkbox is checked

js
IF([gift_wrap], 5, 0)

Charge a minimum price ​

You can use the max function to set a minimum price. For example, if you want to charge at least 10€:

js
MAX(10, [area] * 10)

The max function will return the highest value between the two.

Display a custom error message ​

You can use the error message field to display a custom error.

Then you can control the visibility of the error message using a condition.

Example ​

Display an error when the ordered area is less than 1 square meter:

Condition formula:

js
[area] >= 1

Then you can hide the error message in the condition fields.

Read any variable from PrestaShop ​

In this example, we will read the customer group and apply a discount based on it.

1- Create a dynamic field called customer_group and set the type to Dynamic Variable. 2- Create a php file in [Root of PrestaShop]/dynamicproduct/allocations/products.php and add this code:

php
<?php
if (isset($customer_group)){
    $context = Context::getContext();
    $default_lang = Configuration::get('PS_LANG_DEFAULT');
    $id_customer_group = (int)$context->customer->id_default_group;
    if($id_customer_group){
        $group = new Group($id_customer_group, $default_lang);
         // customer_group will contain assign Guest, Visitor, etc...
        $customer_group = $group->name;
    }
}

Then you can easily create discounts for each group of your choice using the Intervals for example

Example ​

An interval that varies the value of a discount field

Finally, you can use this discount field in your price formula

js
[width] * [height] * ((100 - [discount]) / 100)

This will apply a discount based on the customer group.

Invert the tax calculation ​

By default, the module applies the tax to the calculated price.
If you want to invert the tax calculation, you can use the PHP calculation feature.

1️⃣ Create a dynamic field called tax_rate and set the type to Dynamic Variable.

2️⃣ Create a php file in [Root of PrestaShop]/dynamicproduct/allocations/products.php and add this code:

php
<?php
// Will continue only if you have a field called tax_rate
if (isset($tax_rate)){
    // first read the tax rate of the current product
    /** @var $module DynamicProduct */
    $tax_rate = $module->calculator->getTax($id_product);
}

Now, you can use the tax_rate field in your price formula or in any field formula to invert the tax calculation.

3️⃣ Use the field in your price formula

js
([width] * [height]) / (1 + [tax_rate] / 100)

TIP

If you want to invert the tax calculation for any product that has a tax_rate field, you can add this code in the [Root of PrestaShop]/dynamicproduct/calculator/products.php file

php
<?php
$result = $result / (1 + $tax_rate / 100);