[Python] Is it possible to get data from HTML page to the server side using a hidden field...

Hi guys Here's the problem I'm using a fast render form using Bootstrap-Flask that contains a hidden field and I want to get back a record ID through it but of course,e I can't write simple Jija2 in it because I can't access it from the HTML page or that what I think here's what I have and some solutions I tried (note: I know that if used a different way of rendering the form will be easier to handle this but the core of the question is there a way to do that while using fast render**)**

this is the form

class TaskForm(FlaskForm):
title = StringField(label="Task Title", validators=[DataRequired()])
description = CKEditorField(label="Description", validators=[DataRequired()])
list_id = HiddenField(
label="List id",
validators=[DataRequired()],
default="{{list.id}}",
)
submit = SubmitField("Add task")


I have a container of todo list that I iterate through it

{% for list in all_lists %}
<li class="list col col-sm-3 justify-content-start">

<h5 class="card-title text-muted text-uppercase text-start">
{{ list.title }}
</h5>
<p style="display: none">{{ list.description }}</p>
<hr />
<ol class="fa-ol ol-task justify-content-start">
{% for task in list.ltasks %}
<!-- Cards to do-->
<li class="task justify-content-start">
<h6 class="card-title text-muted text-uppercase text-start" >
{{ task.title }}
</h6>
<hr />
<p class="card-text">{{ task.description }}</p>
</li>
{% endfor %}
<li class="task justify-content-start">
{{ ckeditor.load(pkg_type="basic") }}
{{ ckeditor.config(name='body') }}
{{ render_form(task_form ,novalidate = True, id = "task-form" ) }} <-- Fast rendered form -->
</li>
</ol>
</li>
{% endfor %}


So I have tried to pass the default attribute as seen above and also used render_kw={"value":"{{ list.id }}"} I even tried to the field using javascript and append it to the form which has worked but the list.id only shows up as a string like this:

<input id="list_id" name="list_id" required="" type="hidden" value="{{list.id}}">


and also tried to pass it with different styles like (list.id), and (List.id) with a capital L like the DB class itself, I even tried to pass (db.get_or_404(List,>id<) but remembered that I need the id

I am still learning and knowing the nooks and crannies is part of the quest Thanks in advance

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