How are huge shapes made?

Question

Yii

Good afternoon everyone, I thought about this question. How huge forms are made on popular sites. For example, take for example any site selling a car, there are more forms that can be said individual for each model or, for example, a site selling household appliances, there are a lot of types of this equipment for each model, also specific data. How does everyone do it? How do they render forms depending on the selected models, etc. Are these forms stored in the database and when a certain model is selected, do they load the desired form? How does this happen? Are there any books, articles where at least somehow explain how they do it?

Answer 1

the set of parameters is quite limited, but it is also naturally easier to store and expand in the database.
the data in the parameters can naturally be infinite, but of course there are also default lists, and also in the database, of course.
how it is done - how you do it will be.
EAV can be googled, for example
, the filter itself on the front is a separate big topic - faceted search

Answer 2

www.yiiframework.com/doc-2.0/yii-base-dynamicmodel.html