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HTML, how to auto select the date time picker from sql database

I've a HTML form for editing existing data.
Let's say today is 10/06/2022 18:05 and i want to edit my course date time in my web app.
My course date on the data base is 21/08/2023 10:00. I want to change it to 22/08/2023 10:00. When I open my from on the web app all the inputs came with the existing data already selected. But date time picker comes as 10/06/2022 18:05. I've set the value as the date attribute of course object but it's not working. This works for the rest of the inputs but not for the datetime input.
I basically need the html date time picker comes with autoselected with the existing saved data <course.date> .
I'm writing this web app on python flask and using a postgresql for database. The other inputs comes with selected values but not datetime input.
Anyone has any ideas how to approach this one?
<form action="/courses/{{course.id}}" method="post">
<label for="course">Course Title</label>
<input type="text" name="title" value="{{course.title}}">
<label for="date">Date</label>
<input type="datetime-local" name="date" value="{{course.date}}">
<label for="capacity">Capacity</label>
<input type="number" name="capacity" value="{{course.capacity}}">
<label for="active">Active</label>
<select name="active">
<option value="True">Active</option>
<option value="False" {% if course.active == False %} selected {%endif%}>Deactive</option>
</select>
<input type='submit' value="Update Course">
</form>

If I am understanding the issue right:
course_date in the database is: 21/08/2023 10:00
course_date in the app remains as the local-current time: 10/06/2022 18:05 (example)
GET request properly loads data from the database into the other fields except course-date
you've tried making a POST request to update course_date, but the field doesn't change
My suggestion to debug this is to look at the responses to your GET request. What do they come out as?
Inside your GET request's response,
if the course-date is 21/08/2023 10:00, that means your problem is in your javascript or the code that plugs in your field value inside the HTML. Your frontend field is simply ignoring the response from flask or the data is not being mapped/handled right
if the course-date is 10/06/2022 18:05 or is null. That means your flask backend is broken, double-check the flow of your data from the SQL select -> storing the data in a python variable -> sending the data out
Also remember to Hard-Reload.

Based on our exchange in comments, it looks like the issue is with the date format being passed in your template.
Changing:
<label for="date">Date</label>
<input type="datetime-local" name="date" value="{{course.date}}">
To:
<label for="date">Date</label>
<input type="datetime-local" name="date" value="{{course.date.isoformat()}}">
Should correct the problem for you.

How to get if checkbox is checked on flask

I'm using Bootstrap with Flask Python.
request.form.get("name")
#name is the name of the form element(checkbox)
<label class="btn btn-danger pzt active">
<input type="checkbox" name="name" value="1" data-id="0"> Check
</label>
When checkbox is checked, parent label has class "active", I want to get if checked box is checked. Is there any way or methods?

you can try the following:
HTML:
<div class="checkbox">
<label>
<input type="checkbox" name="check" value="edit"> New entry
</label>
</div>
In flask:
value = request.form.getlist('check')
This will give you the value of the the checkbox. Here value will be a list.
value = [u'edit']
You can also get value of multiple checkboxes with same name attribute.

I'm not familiar with Flask, but I do know how HTTP works.
If you want to know if its checked on the server side, just check if that form field exists, if request.form.get("name") gives you NULL or exception, then the checkbox should be unchecked.
If you want to know it on the client side with javascript, you can use jQuery (as jQuery is a base component of Bootstrap) as $('xxxx').is(':checked') (replace xxxx with a valid selector).

Python request input's id from a form

I use google app engine and python. I want to retrieve the id of an input and not the value. If I use self.request.get("thename") I get the value of the input.
Here is the html
<form method="post">
<input value=" " type="submit" name="thename" id="thenumberIneed"/>
</form>
I cannot put my data on the value tag because I have an image as a background on the input and if I enter there anything, the data shows infront of the image. So, I keep value empty.

If you don't want the value to show, change it to:
<input type="hidden" ... />
But I suspect there are other problems you should be solving, like why does your image get in the way of showing values in the page, and what kind of data you want to retrieve.

You shouldn't be using the id for this type of logic.
You would have better luck using a seperate hidden input field, for example.
<input type='hidden' name='myval' value='thenumberyouneed' />
And then you can just do your search for myval and get your answer.

Get list of input names and values from HTML field set in Django

Using Django I'm looking for a good way to get the input values and names of type=hidden from a template HTML. I understand the request.POST.getlist method would return a list of all inputs with the same name value. But I actually need to get all the names as well as the values. i.e.,
HTML Code:
<fieldset class="submit">
<input type="hidden" name="testName" value="0" id="processed-input" />
<input type="submit" name="submit" value="Rotate" class="submit" />
</fieldset>
And I need to get a list of related names and values. For this case, testName:0.
Any help would be appreciated! Thanks!

That's what request.POST is: a mapping of all names to values.

Accessing POST params with same name in python

I need to get values of these check boxes with same name through HTTP "POST".
<input type="checkbox" id="dde" name="dept[]" value="dde"/>
<input type="checkbox" id="dre" name="dept[]" value="dre"/>
<input type="checkbox" id="iid" name="dept[]" value="iid"/>
How to get these values in python using self.request.get() method?

You can use request.get_all().
According to the docs it "Returns a list of values of all of the query (URL) or POST arguments with the given name, possibly an empty list."