Re: How to over ride the get context data method in view

Hi,

There are a couple of errors in your code:

1. You are using a ListView and then trying to get an individual post? That is really strange

2. In your get_context_data method - you first get the context data, update it and then you set it to a new dict, so everything is reset in the dict.

3. you are trying to get the absolut url for your post, but aren't showing any post detail view.

Regards,

Andréas

Den ons 13 maj 2020 kl 06:46 skrev Ahmed Khairy <ahmed.heshameldin@gmail.com>:

I am currently trying to create a like button for my posts in Django

I have reached to the part where I can add a like but I am facing difficulty writing the code related to the view which linking the PostListView if there is user who liked it or not. I am getting an error: page Error 404 although everything is correct

this the views: 

class PostListView(ListView):

    model = Post

    template_name = "score.html"

    ordering = ['-date_posted']

    context_object_name = 'posts'

    queryset = Post.objects.filter(admin_approved=True)

    paginate_by = 5

    def get_context_data(self, **kwargs):

        post = get_object_or_404(Post, id=self.request.POST.get('post_id'))

        context = super(PostListView, self).get_context_data(**kwargs)

        context['posts'][0].likes.filter(id=self.request.user.id).exists()

        is_liked = False

        if post.likes.filter(id=self.request.user.id).exists():

            is_liked = True

        context = {'post': post,

                   'is_like': is_liked,

                   }

        return context

def like_post(request):

    post = get_object_or_404(Post, id=request.POST.get('post_id'))

    is_liked = False

    if post.likes.filter(id=request.user.id).exists():

        posts.likes.remove(request.user)

        is_liked = False

    else:

        post.likes.add(request.user)

        is_liked = True

    return HttpResponseRedirect(post.get_absolute_url())

This is the model 

class Post(models.Model):      designer = models.ForeignKey(User, on_delete=models.CASCADE)      title = models.CharField(max_length=100)      date_posted = models.DateTimeField(default=timezone.now)      likes = models.ManyToManyField(User, blank=True, related_name='likes')        def __str__(self):          return self.title

Here is the

path('like/', like_post, name='like_post'),

here is the template: 

{% extends "base.html"%} {% block content %} {% for post in posts %}    <div style="padding-top: 200 px;"><strong>{{post.title}}</strong></div>    <form action="{% url 'score:like_post'%}" method="POST" class="ui form">    {% csrf_token %} {% if is_like %}    <input type="hidden" name="post_id" value="{{post.id}}" />    <button class="ui button positive" type="submit">Unlike</button>    {% else %}    <button class="ui button negative" type="submit">Like</button>    {% endif %}  </form>  <strong>Likes </strong>    

{% endfor %} {% endblock content %} 

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