How to organize a pattern for an online store on Laravel + PostgreSQL?

Question

PostgreSQL

Greetings,
I just can’t figure out how to organize an e-store database on postgresql, namely:
1. Each product has its own unique characteristics, for example:
if these are mobile phones, then the characteristics are (standard: GSM, camera: 20mpx, infrared port: yes, well, etc.), and if it is a refrigerator - the characteristics will be as follows (Type of refrigerator: Two-chamber, Number of compressors: 1, Type of control: Electronic, etc.) - I don’t understand how to organize such a base ... But, there is one more nuance :
2. Looking through the html in some marketplaces, I saw the same characteristics in the categories, when adding a product, for example, Bluetooth TVs and refrigerators also have Bluetooth - in these categories, the "bluetooth" parameter has the same id. How can this be done with laravel and postgresql. Please do not judge strictly! Thank you in advance!

Answer 1

Table of attributes id:1, title: "BlueTooth", type: "Boolean", ...
Table of classes (sets of attributes for a product) id: 1, title: Холодильник
Cross-tab: id_класса, id_признака
Products:title: Бирюза Х-1, id_класса: 1

Answer 2

https://inviqa.com/blog/understanding-eav-data-mod...