В the previous article on Django we created an application, a database model and mirrored the created database in the admin application. In today’s article, we are following the pattern MVC – (model, controller, template), include in the file views.py apps blog, our model from models.py, and create functions for accessing data, and displaying them in html template.
Creating a controller.
Model layer in file models.py serves to create and display database fields. The next layer is stored in the folder views.py, he is responsible for what will be displayed in response to requests for the blog page. The layer accepts the request request and returns the response in the form html page template. That is, the template will be generated dynamically depending on the data in our database, and the data itself will be formatted with the appropriate tags!
from django.shortcuts import render
from django.http import HttpResponse
# импорт модели
from .models import Post
def show(request):
#обращение к модели и вывод значений из нее
posts = Post.objects.all()[:10]
context = {
'title':'Post',
'posts': posts
}
# возврат шаблона с подставленными значениями
return render(request, "blog/detail.html", context)
The next step is to create a folder inside the application directory template, with the following structure template / blog / file.html… Subfolder blog is present here to avoid name conflicts in the project. Further, in the internal folder blog create a file index.htmlcontaining the basic markup.
And in the same place we will create detail.html
# index.html
class="container center-align"> rel="stylesheet" href="https:> name="viewport" content="width=device-width, initial-scale=1.0"> charset="utf-8"> lang="en">
{% block content %}
# здесь окажется код с дочерних файлов
{% endblock %}
class="container">
Polls app
Admin Login
# detail.html
{% extends 'blog/index.html' %}
{% block content %}
{{title}}
class="center-align blue lighten-2">
-
{% for post in posts %}
- {{post.title}}
class="collection-item">
class="collection">
{% endfor %}
{% endblock %}
As you can see, both files have a common construction {% block content%} – {% endblock%}. And in detail.html present {% extends ‘blog / index.html’%}. That’s what it is template engine with its own language. Now, when requesting the application file url.py, the module function will be called views.pywhich will return the data page.
from django.urls import path
from . import views
from django.conf.urls import url
urlpatterns = [
url(r'^details/(?P
]
Thus, splitting the code into separate components reduces their interdependence, and Django templating engine minimizes the writing of monotonous code.
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