CODEWITHSUNDEEP
django
Irmantas Želionis
Irmantas Želionis

Reputation: 2324

How to delete exactly element from database?

TOday I am trying to make some kind of to-do list. I know how to add tasks(comments) and now I want to delete them with a button. I don't know how to delete exact task (comment). Code:

#views.py

def add_comment(request):
    comments = Comment.objects.all()
    if request.method == 'POST':
        form = CommentForm(request.POST)
        if "delete" in request.POST:

            #HERE MAGIC HAPPENS

        if form.is_valid():
            save_it = form.save()
        return render(request, 'task-result.html', {
        'form': form, 'comments': comments,
        })
    else:
        form = CommentForm()
    return render(request, 'Task-form.html', {
        'form': form,
        })

#HTML

<form action="">
      {% for a in comments %}
          <h3>{{ a.body}}</h3>
          <input type="submit" name="delete" value="delete" />
      {% endfor %}
      {% csrf_token %}
</form>

So how to make "magic" happen?

Addition

Now I'm facing new problems. Delete button does nothing or i get eroor: invalid literal for int() with base 10: ''. Code:

#Template: 

<html>
<head>
    <title>Name</title>
</head>
<body>
    <h1>Tasks</h1>
    <form action="" method="post">
      {{ form.as_p }}
      <input type="submit" value="Create task">
      {% for a in comments %}
      <h3>{{ a.body}}</h3>
      <input type="submit" name="delete" value="delete" />
      <input type="hidden" name="idcomment" id="{{comments.id}}" />
      {% csrf_token %}
    </form>
    {% endfor %}
</body>
</html>

#Views

def add_comment(request):
    comments = Comment.objects.all()
    if request.method == 'POST':
        form = CommentForm(request.POST)
        if "delete" in request.POST:
            comments_id = request.POST['idcomment']
            comments_object = Comment.objects.get(id=comments_id)
            comments_object.delete()
        if form.is_valid():
            save_it = form.save()
        return render(request, 'task-form.html', {
        'form': form, 'comments': comments,
        })
    else:
        form = CommentForm()
    return render(request, 'Task-form.html', {
        'form': form, 'comments': comments,
        })

Can you help me solve this one?

Upvotes: 0

Views: 166

Answers (1)

Tony
Tony

Reputation: 394

My solution will be to add a function delete in your views that will take for argument the comment number.

def del_comment(request, commentsid):
    comments = Comment.objects.get(id=commentsid)
    comments.delete()

and your url:

url(r'^yoururl/del/(?P<commentsid>\d+)/', del_comment),

in your template link your comment button delete to this url 

yoururl/del/{{yourvalue of the comment that will give the id of the current comment}}

example in templates:

  {% for a in comments %}
      <h3>{{ a.body}}</h3>
  <a HREF="/yoururl/del/{{a.id}}"> Delete ME </a>
  {% endfor %}

There is another solution that may work:

   if request.method == 'POST':
        form = CommentForm(request.POST)
        if "delete" in request.POST:
            comments_id = request.POST['idcomment']  #the name of the hidden field and get the id of the comment.
            comments_object = Comment.objects.get(id=comments_id)
            comments_object.delete()                

        if form.is_valid():
            save_it = form.save()
        return render(request, 'task-result.html', {
        'form': form, 'comments': comments,
        })

the hidden field should look like this in your template:

<input type="hidden" name="idcomment" id="{{comments.id}}" /> #or value="{{comments.id}} sorry i do not have my own example on hand.

Upvotes: 2

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