php - How can I customize form fields IDs in Symfony 4?

I'm building a web page in Symfony that is built with multiple instances of the same form, but with different POST urls. I want to intercept the submit with javascript, and do a simple AJAX POST.

The structure of this page is this:

<h1>Title</h1>
{% for document in documents %}
    <div id="form_{{ document.id }}">
        {{ form(document.form) }}
        <input type="submit">Submit button</input>
    </div>
{% endfor %}
<hr />
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If I have 4 documents in thedocuments array, 4 forms will be rendered. The problem is that all the documents fields will have the same ID: there will be 4document_csrf, 4document_title title, and so, because alldocuments are views of theDocumentType form.

What I want is to add something to the generation of the form, so each form field is rendered with unique fieldnames:document_csrf1,document_title_1,document_csrf2,document_title_2, etc.

I've been looking around StackOverflow and the Symfony Documentation, but I can't find anything. I can pass an['attr'] => ['id' => $id]] then calling thecreateForm function, but this ID is only used for the<form> tag, not the other fields...

Is there any way to automatically add an ID to the form, or should I render the form adding the id to each element ({{ form_widget(form.name, {'attr': {'id': 'document_name' ~ document.id}}) }})?

Thank you for your help!

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