lesson 51

ap_12/core/urls.py

@@ -22,8 +22,8 @@ urlpatterns = [
     path('admin/', admin.site.urls),
     path('', views.IndexRedirectView.as_view(), name='redirect_to_index'),
     path('articles', views.IndexView.as_view(), name='index'),
-    path('articles/add', views.article_create_view, name='articles_add'),
+    path('articles/add', views.ArticleCreateView.as_view(), name='articles_add'),
     path('articles/<int:id>', views.ArticleDetailView.as_view(), name='articles_detail'),
-    path('articles/<int:id>/update', views.article_update_view, name='articles_update'),
+    path('articles/<int:id>/update', views.ArticleUpdateView.as_view(), name='articles_update'),
     path('articles/<int:id>/delete', views.article_delete_view, name='articles_delete'),
 ]

ap_12/templates/articles/article.html

+{% extends 'base.html' %}
+
+{% block content %}
+    <h1>{{ title }}</h1>
+
+    {% include 'partial/form.html' with request_method='post' %}
+
+{% endblock %}
\ No newline at end of file

ap_12/templates/articles/create.html

-{% extends 'base.html' %}
-
-{% block content %}
-    <h1>Create Article</h1>
-
-    <form action="{% url 'articles_add' %}" method="post">
-        {% include 'partial/article_form.html' with btn_text='Create' %}
-    </form>
-{% endblock %}
\ No newline at end of file

ap_12/templates/articles/update.html

-{% extends 'base.html' %}
-
-{% block content %}
-    <h1>Update Article</h1>
-
-    <form action="{% url 'articles_update' id=article.id %}" method="post">
-        {% include 'partial/article_form.html' %}
-    </form>
-{% endblock %}
\ No newline at end of file

ap_12/templates/partial/article_form.html → ap_12/templates/partial/form.html

 {% if not fields_only %}
-    <form action="{{ action_url }}" method="{{ request_method|default:'get' }}">
+    <form method="{{ request_method|default:'get' }}">
     {% csrf_token %}
 {% endif %}
 

ap_12/webapp/forms.py

 from django import forms
-from django.forms import widgets
+from django.forms import ValidationError
 
 from webapp import models
 
 
-class ArticleForm(forms.Form):
-    title = forms.CharField(max_length=200, required=True, label='Title')
-    author = forms.CharField(max_length=40, required=True, label='Author')
-    text = forms.CharField(
-        max_length=3000, required=True, 
-        label='Text', widget=widgets.Textarea,
-    )
-    tags = forms.ModelMultipleChoiceField(
-        required=False, label='Tags', queryset=models.Tag.objects.all(),
-        widget=widgets.CheckboxSelectMultiple()
-    )
+class ArticleForm(forms.ModelForm):
+    class Meta:
+        model = models.Article
+        fields = ('title', 'text', 'author', 'tags')
+    
+    def clean(self):
+        if self.data['title'] == self.data['text']:
+            raise ValidationError('Text should not duplicate title')
+
+        return super().clean()

ap_12/webapp/models.py

 from django.db import models
+from django.core.validators import MinLengthValidator
 
 
 class Article(models.Model):
     title = models.CharField(
-        max_length=200, null=False, blank=False, verbose_name='Заголовок',
+        max_length=200, null=False, 
+        blank=False, verbose_name='Заголовок',
+        validators=[MinLengthValidator(12)]
     )
     text = models.TextField(
         null=False, blank=False, verbose_name='Текст',

ap_12/webapp/views.py

 from typing import Any
+from django.http.response import HttpResponse as HttpResponse
 from django.shortcuts import render, get_object_or_404, redirect
+from django.urls import reverse
 from django.views import generic
 
 from webapp.forms import ArticleForm
 from webapp.models import Article
 
 
-# CRUD - Create Read Update Delete
-
-
 class IndexRedirectView(generic.RedirectView):
     pattern_name = 'index'
 
@@ -28,28 +27,48 @@ class ArticleDetailView(generic.TemplateView):
         return super().get_context_data(**kwargs)
 
 
-def article_create_view(request):
-    if request.method == 'GET':
-        form = ArticleForm()
-        return render(request, 'articles/create.html', context={'form': form})
+class ArticleCreateView(generic.FormView):
+    template_name = 'articles/article.html'
+    form_class = ArticleForm
     
-    elif request.method == 'POST':
-        form = ArticleForm(data=request.POST)
+    def form_valid(self, form):
+        self.article = form.save()
+        return super().form_valid(form)
 
-        if form.is_valid():
-            tags = form.cleaned_data.pop('tags')
+    def get_success_url(self):
+        return reverse('articles_detail', kwargs={'id': self.article.id})
 
-            article = Article.objects.create(**form.cleaned_data)
-            article.tags.set(tags)
 
-            return redirect('articles_detail', id=article.id)
+class ArticleUpdateView(generic.FormView):
+    template_name = 'articles/article.html'
+    form_class = ArticleForm
     
-        else:            
-           return render(
-               request, 'articles/create.html', 
-               context={'form': form},
+    def dispatch(self, request, *args, **kwargs):
+        self.article = self.get_object()
+        return super().dispatch(request, *args, **kwargs)
+    
+    def get_object(self):
+        return get_object_or_404(Article, id=self.kwargs.get('id'))
+
+    def get_context_data(self, **kwargs):
+        return super().get_context_data(
+            **kwargs, 
+            article=self.article,
+            btn_text='Update',
         )
     
+    def get_form_kwargs(self):
+        kwargs = super().get_form_kwargs()
+        kwargs['instance'] = self.article
+        return kwargs
+
+    def form_valid(self, form):
+        self.article = form.save()
+        return super().form_valid(form)
+    
+    def get_success_url(self):
+        return reverse('articles_detail', kwargs={'id': self.article.id})
+
 
 def article_update_view(request, id):
     article = get_object_or_404(Article, id=id)
@@ -63,7 +82,7 @@ def article_update_view(request, id):
         })
 
         return render(
-            request, 'articles/update.html', 
+            request, 'articles/article.html', 
             context={'article': article, 'form': form},
         )
     
@@ -83,7 +102,7 @@ def article_update_view(request, id):
 
             return redirect('index')
         else:
-            return render(request, 'articles/update.html', context={'form': form, 'article': article})
+            return render(request, 'articles/article.html', context={'form': form, 'article': article})
 
 
 def article_delete_view(request, id):