How to Create a Dynamic Product Attribute in Magento Based on User Input During Quote/Order Creation?

Magento - Product attribute based on user input during Quote/Order creation

Introduction

This article will provide solutions to create a custom product attribute that is not stored on products or displayed on the product edit page. Instead, it will be saved to order/quote items and displayed on orders, invoices, and other related documents. Additionally, it will be configurable by the customer on the frontend before adding a product to the cart.

Problem Definition

• Add a custom product attribute that is not part of the standard product attributes or custom options.
• The attribute should be visible and configurable by customers on the product page before adding it to the cart.
• The attribute's value should be saved with the quote/order item.
• The attribute's value should be displayed on orders, invoices, sales emails, and other relevant documents.
• Provide the ability to filter order collections based on the attribute's value.

Solution

Capturing, Validating, and Saving the Attribute Value

1. Event Observer: Use an event observer, such as catalog_product_load_after, to capture and store the attribute's value.
2. Customer Input: Add a form element to the product page to allow customers to input the attribute's value.
3. Validation: Validate the customer input on the server-side to ensure it meets the specified criteria.
4. Additional Options: Store the validated value in the additional_options key of the product model's custom_options array.

Displaying the Attribute Value

1. Order and Invoice Display: Customize the order and invoice templates to display the attribute's value alongside other product details.
2. Email Display: Update the sales emails templates to include the attribute's value in the relevant sections.

Filtering Order Collection

1. Custom Attribute: Create a custom attribute in the database to store the attribute's value.
2. Event Observer: Use an event observer, such as sales_convert_quote_item_to_order_item, to populate the custom attribute.
3. Order Collection: Query the order collection using the custom attribute's value as the filter criteria.

Reordering Support

To ensure the attribute's value persists during reorders, use a checkout event observer, such as checkout_cart_product_add_after, to copy the attribute value to the quote item.

Translation

• Use event observers to translate the attribute's label and value in quote and order items.
• Override the default display templates to handle translation if necessary.

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