Django 1.11 Templates, CRUD & Views

list-view.html

{% if messages %}
<ul class="messages">
    {% for message in messages %}
    <li{% if message.tags %} class="{{ message.tags }}"{% endif %}>{{ message }}</li>
    {% endfor %}
</ul>
{% endif %}

<form method="GET" action="/blog/">
  <input type="text" name="q" placeholder="Buscar">
</form>

<h1>Blog</h1>

{% for object in object_list %}
<li>
  <a href="/blog/{{ object-id }}">{{ object.title }}</a>
</li>
{% endfor %}

views.py

from django.contrib.auth.decorators import login_required
from django.contrib.import messages
from django.db.models import Q
from django.http import HttpResponse, Http404, HttpResponseRedirect
from django.shortcuts import render, get_object_or_404

# Create your views here.

from .forms import PostModelForm
from .models import PostModel

def post_model_create_view(request):
  form = PostModelForm(request.POST or None)
  context = {
    'form': form
  }
  if form.is_valid(): 
    obj = form.save(commit=False)
    # print(obj.title)
    obj.save()
    messages.success(request, 'Create a new post!')
    context = {
      "form": PostModelForm()
    }
  
  template = 'blog/create-view.html'
  return render(request, template, context)


def post_model_update_view(request, id=None):
  obj = get_object_or_404(PostModel, id=id)
  form = PostModelForm(request.POST or None, instance=obj)
  context = {
    'form': form
  }
  if form.is_valid():
    obj = form.save(commit=False)
    # print(obj.title)
    obj.save()
    messages.success(request, 'Update post!')
    return HttpResponseRedirect('/blog/{pk}'.format(pk=obj.id))
  
  template = 'blog/update-view.html'
  return render(request, template, context)


def post_model_delete_view(request, id=None):
  obj = get_object_or_404(PostModel, id=id)
  if request.method == 'POST':
    obj.delete()
    # podemos agregar el framework de messages de Django para manejar los mensajes
    # https://docs.djangoproject.com/en/1.11/ref/contrib/messages/#module-django.contrib.messages
    messages.success(request, 'Post deleted')
    return HttpResponseRedirect('/blog/')
  context = {
    'object': obj,
  }
  template = 'blog/delete-view.html'
  return render(request, template, context)


def post_model_detail_view(request, id=None):
  obj = get_object_or_404(PostModel, id=id)
  context = {
    'object': obj,
  }
  template = 'blog/detail-view.html'
  return render(request, template, context)


def post_model_list_view(request):
  # Si tenemos un input de busqueda dentro de un form con name=q
  # podemos hacer una busqueda, muy simplificada, definiendo una variable query
  # más info de queries complejas https://docs.djangoproject.com/en/1.11/topics/db/queries/#complex-lookups-with-q-objects
  query = request.GET.get('q', None)
  qs = PostModel.objects.all()
  if query is not None:
    qs = qs.filter(
      Q(title__icontains=query) |
      Q(content__icontains=query) |
      Q(slug__icontains=query)
    )   
    
  context = {
    'object_list': qs,
  }
  template = 'blog/list-view.html'
  return render(request, template, context)
  

@login_required(login_url='/login/')
def login_required_view(request):
  print(request.user)
  qs = PostModel.objects.all()
  context = {
    'object_list': qs,
  }
  
  if request.user.is_authenticated():
    template = 'blog/list-view.html'
  else:
    template = 'blog/list-view-public.html'
    # raise Http404
    return HttpResponseRedirect('/login/')
  
  return render(request, template, context)