004-s9E5EYAm5gs. creating simple api server without using rest-framework
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You create project
django-admin startproject jsonmid
You move to created folder
cd jsonmid
You run server
python manage.py runserver
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First, you create blog app
python manage.py startapp blog
go to settings.py
Find INSTALLED_APPS
add 'blog'
go to urls.py
find urlpatterns
add,
from djando.confg.urls import include, url
url(r'', include('blog.urls'))
go to blog/urls.py
add,
from django.conf.urls import url
urlpatterns = [
]
go to blog/views.py
add,
from django.shortcuts import render
def post_list(request):
pass
go to blog/urls.py
add,
from . import views
urlpatterns = [
url(r'^$', views.post_list),
]
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go to blog/views.py
add,
from django.http import JsonResponse
def post_list(request):
data = [
{'id':1, 'title':'title 1'},
]
return JsonResponse(data, safe=False)
runserver and go to localhost:8000
and you can see json response
In chrome, you can install jsonview plugin to see fomatted json
[
-{
title : "title 1",
id : 1
}
]
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Create blog/models.py
add,
from django.db import models
class Post(models.Model):
title = models.CharField(max_length=100)
content = models.TextField()
created_at = models.DateTimeField(auto_now_add=True)
updated_at = models.DateTimeField(auto_now=True)
You need to do migration
python manage.py migrate
python manage.py makemigrations blog
migrate blog
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go to blog/admin.py
Register Post model to admin
from django.contrib import admin
from .models import Post
admin.site.register(Post)
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Create admin credential
python manage.py createsuperuser
go to localhost:8000/admin
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Write 3 posts
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go to blog/views.py
add,
from .models import Post
def post_list(request):
post_list = []
for post in Post.objects.all():
post_list.append({
'id': post.id,
'title': post.title,
'content': post.content,
})
return JsonResponse(post_list, safe=False)
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go to models.py
add,
class Article(models.Model):
title = models.CharField(max_length=100)
content = models.TextField()
created_at = models.DateTimeField(auto_now_add=True)
updated_at = models.DateTimeField(auto_now=True)
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python manage.py makemigrations blog
python manage.py migrate blog
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go to blog/admin.py
add,
admin.site.register(Article)
Write 3 posts
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go to blog/urls.py
add,
url(r'^$', views.article_list)
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go to blog/views.py
add,
from .models import Post, Article
def article_list(request):
article_list = []
for article in Article.objects.all():
article_list.append({
'id': article.id,
'title': article.title,
'content': article.content,
})
return JsonResponse(article_list, safe=False)
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go to blog/urls.py
replace with
url(r'^posts.json/$', view.post_list)
url(r'^articles.json/$', view.article_list)
add,
url(r'^recent_post.json/$', view.recent_post_list)
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go to blog/views.py
def recent_post_list(request):
article_list = []
for article in Post.objects.order_by('-id)[:2]:
article_list.append({
'id': article.id,
'title': article.title,
'content': article.content,
})
return JsonResponse(article_list, safe=False)
go to localhost:8000/recent_posts.json
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go to blog/views.py
add and refactor
def json_requests(qs):
mylist = []
for instance in qs:
mylist.append({
'id':instance.id,
'title':instance.title,
'content':instance.content,
})
return JsonResponse(mylist, safe=False)
def post_list(request):
qs = Post.objects.all()
return json_response(qs)
def recent_post_list(request):
qs = Post.objects.order_by('-id')[:2]
return json_response(qs)
def article_list(request):
qs = Article.objects.all()
return json_response(qs)
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middleware in django
We can designate method which will be called in moment
before view is invoked and after view is invoked
create blog/middleware.py
add,
class JsonResponseMiddleware(object):
def process_response(self, request, response):
# You make method here
return response
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go to settings.py
find, MIDDLEWARE_CLASSES
you can see default middleware
add,
'blog.middleware.JsonResponseMiddleware'
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go to blog/middleware.py
class JsonResponseMiddleware(object):
def process_response(self, request, response):
print('abcde')
def json_requests(qs):
mylist = []
for instance in qs:
mylist.append({
'id':instance.id,
'title':instance.title,
'content':instance.content,
})
return JsonResponse(mylist, safe=False)
return response
views.py
def post_list(request):
return Post.objects.all()
def recent_post_list(request):
return Post.objects.order_by('-id')[:2]
def article_list(request):
return Article.objects.all()
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