Django class CURD

DJANGO_CURD.py

####################### MODELS  ##########################
class ModelAuthor(models.Model):
    username = models.CharField(max_length=150, null=False, blank=False)

    def __str__(self):
        return self.username # This gets called for example when you create an user input, the text shown is the returned string


class ModelPost(models.Model):
    title = models.CharField(max_length=200)
    author = models.ForeignKey(ModelAuthor)
    body = models.TextField()
    created = models.DateField(auto_now_add=True)
    updated = models.DateField(auto_now=True)

    def __str__(self):
        return "post from {} created at {}".format(self.author, self.created)
      
####################### VIEWS  ##########################
from django.http import HttpResponseRedirect
from demos.models import ModelPost
from django.core.urlresolvers import reverse
from django.views.generic import CreateView, UpdateView, DetailView, DeleteView, ListView

# We will have access to object_list which is usually the items in the query_set
class ViewListPost(ListView):
    queryset = ModelPost.objects.all()

    # model = ModelPost
    # paginate_by = 2
    template_name = 'db_crud/list.html'


class ViewCreatePost(CreateView):
    template_name = 'db_crud/create.html'
    # form_class = FormPost
    model = ModelPost
    fields = '__all__'  # or []

    def form_valid(self, form):
        # Don't call super(..) if you want to process the model further(add timestamp, and other fields, etc)
        # super(ViewCreatePost, self).form_valid(form)
        model = form.save(commit=False)
        model.save()
        return HttpResponseRedirect(reverse('demos-models-dbcrud-list'))
        # You have to either return an HttpResponse(or subclasses), or define get_absolute_url, success_url, etc


class ViewUpdatePost(UpdateView):
    model = ModelPost
    template_name = 'db_crud/update.html'
    fields = ['title', 'body']

    def get_object(self, queryset=None):
        id = self.kwargs['id']
        return self.model.objects.get(id=id)

    def form_valid(self, form):
        form.save()
        return HttpResponseRedirect(reverse('demos-models-dbcrud-list'))


class ViewDetailPost(DetailView):
    model = ModelPost
    template_name = 'db_crud/detail.html'

# Display a confirmation warning before deleting, if triggered with GET: it shows the warning(template view)
# If triggered with POST then deletes, the template will receive object, which is the item to be deleted
class ViewDeletePost(DeleteView):
    template_name = 'db_crud/delete.html'
    model = ModelPost
    # Notice get_success_url is defined here and not in the model, because the model will be deleted
    def get_success_url(self):
        return reverse('demos-models-dbcrud-list')
      
#######################  LIST.HTML ##########################
{% extends 'base.html' %}
{% block content %}
    <a href="{% url 'demos-models-dbcrud-create' %}">Create New</a>
    <br>
    {% if object_list %}
        {% for post in object_list %}
            <span>{{ post.title }}</span>
            <p>{{ post.body }}</p>


            <a href="{% url 'demos-models-dbcrud-detail' post.id %}" class="btn btn-success btn-sm">
                <span class="glyphicon glyphicon-edit"></span>
                Read more</a>
            <a href="{% url 'demos-models-dbcrud-update' post.id %}" class="btn btn-warning btn-sm">
                <i class="fa fa-pencil" aria-hidden="true" style="color: black"></i>
                Edit</a>

            <a href="{% url 'demos-models-dbcrud-delete' post.id %}" class="btn btn-danger btn-sm">
                <i class="fa fa-trash" aria-hidden="true" style="color: black"></i>
                Delete
            </a>

                <hr>
        {% endfor %}
    {% endif %}
{% endblock %}


#######################  CREATE.HTML ##########################
{% extends 'base_bak.html' %}
{% block content %}
    <a href="{% url 'demos-models-dbcrud-list' %}">Go Back To list</a>
    <form action="" method="post">{% csrf_token %}
    {{ form.as_p }}
    <button type="submit" class="btn btn-info">Create</button>
    </form>
{% endblock %}


####################### UPDATE.HTML  ##########################
{% extends 'base_bak.html' %}
{% block content %}
    <a href="{% url 'demos-models-dbcrud-list' %}">Go Back To list</a>
    <form action="" method="post">{% csrf_token %}
    {{ form.as_p }}
    <button type="submit" class="btn btn-info">Update</button>
    </form>
{% endblock %}


#######################  DELETE.HTML ##########################
{% extends 'base_bak.html' %}
{% block content %}
    <a href="{% url 'demos-models-dbcrud-list' %}">Go Back To list</a>
    <form method="post">
    {% csrf_token %}
        <button class="btn btn-danger">Are you sure you want to delete {{ object }}?</button>
    </form>
{% endblock %}