Checkbox Usage Examples in Django Development

# New articles added
def add(request):
  if  == 'GET':
    tags = ()
    return render(request, 'books_add.html', {'tags': tags})
  elif  == 'POST':
    title = ('title', None)
    content = ('content', None)
    blogModel = BlogModel(title=title, content=content, author=(id=1))
    ()
    # Get the value of the checkbox, which is an array of checked boxes.
    tags = ('tags')
    # Loop over all checked checkboxes and append to the database using many-to-many relationships.
    for tag in tags:
      (tag)
    return HttpResponseRedirect('book_add')
  else:
    return HttpResponse(u'is the way the request is not processed')

<div class="form-group">
  <label class="col-sm-2 control-label">tab (of a window) (computing)</label>
  <div class="col-sm-9">
    {% for tag in tags %}
      <label class="checkbox-inline">
        <input value="{{  }}" type="checkbox" name="tags"/>{{  }}
      </label>
    {% endfor %}
  </div>
</div>

# Edit the blog
def edit(request, blog_id):
  tags = ()
  # Use forward lookup to find tags about this blog's choices
  blogModel = (id=blog_id).first()
  # Get all the tags
  check_tag = ()
  # Get the selected id
  check_id = [int() for x in check_tag]
  print check_id
  return render(request, 'books_edit.html', {'tags': tags, 'check_id': check_id})

<div class="form-group">
  <label class="col-sm-2 control-label">tab (of a window) (computing)</label>
  <div class="col-sm-9">
    {% for tag in tags %}
      {% if  in check_id %}
        <label class="checkbox-inline">
          <input value="{{  }}" type="checkbox" name="tags" checked="checked"/>{{  }}
        </label>
      {% else %}
        <label class="checkbox-inline">
          <input value="{{  }}" type="checkbox" name="tags"/>{{  }}
        </label>
      {% endif %}
    {% endfor %}
  </div>
</div>

$('#btn').on('click', function (e) {
  // Setting up empty arrays
  var hobby = [];
  $('#hobby-group').find('input[type=checkbox]').each(function () {
 if ($(this).prop("checked")) {
   var hobbyId = $(this).val();
   (hobbyId);
 }
  })
  (hobby);
  $.ajax({
 'url': '/ajaxpost/',
 'method': 'post',
 'data': {
   'username': $('.username').val(),
   'hobby': hobby
 },
 'traditional': true,
 'beforeSend': function (xhr, settings) {
   var csrftoken = ('csrftoken');
   //2. Set the value of csrf_token in the header.
   ('X-CSRFToken', csrftoken);
 },
 'success': function (data) {
   (data);
 }
  })
})

@require_http_methods(['POST'])
def ajaxpost(request):
  form = LoginForm()
  if form.is_valid():
    username = form.cleaned_data.get('username', None)
    # Get the value of the checkbox
    hobby = ('hobby')
    print '*' * 100
    print hobby
    print '*' * 100
    return HttpResponse(u'Success')
  else:
    return HttpResponse(u'Validation Error')