https://jsonformatter.org/ https://www.django-rest-framework.org/ https://www.django-rest-framework.org/topics/browsable-api/ https://www.django-rest-framework.org/api-guide/validators/
https://www.youtube.com/watch?v=VHlBwk_ZQRs&feature=youtu.be
pip install django
pip install pillowdjango-admin startproject onlinestore
cd onlinestore
python manage.py migrate
create superuser
python manage.py createsuperuser
Username (leave blank to use 'pasqualespica'): admin
Email address:
Password:
Password (again):
The password is too similar to the username.
This password is too short. It must contain at least 8 characters.
This password is too common.
Bypass password validation and create user anyway? [y/N]: y
Superuser created successfully.create app
(avremmo potuto aspettare di creare i modelli di products prima da dare il comando migrate ma va bene anche cosi)
python manage.py startapp products
andiamo ora a installare la nosta app in onlinestore\settings.py
INSTALLED_APPS = [
'django.contrib.admin',
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.messages',
'django.contrib.staticfiles',
'products'
]
adesso siamo pronti di creare i nostri modelli nel file models.py della nostra
app products e poi lanciare i comandi :
(venv2) (base) Pasquales-MacBook-Pro:onlinestore pasqualespica$ python manage.py makemigrations
Migrations for 'products':
products/migrations/0001_initial.py
- Create model Manufacturer
- Create model Product
(venv2) (base) Pasquales-MacBook-Pro:onlinestore pasqualespica$ python manage.py migrate
Operations to perform:
Apply all migrations: admin, auth, contenttypes, products, sessions
Running migrations:
Applying products.0001_initial... OKadesso siamo pronti a creare le nostre views all'interno del file views.py
pip install django
pip install djangorestframework
creiamo project
django-admin startproject newsapi
cd newsapi
creaimo APP
python manage.py startapp news
Installare la nostra APP e DRS in settings.py
INSTALLED_APPS = [
'django.contrib.admin',
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.messages',
'django.contrib.staticfiles',
'rest_framework',
'news'
]Poi creiamo i MODEL ... e subito dopo ...
(venv3) (base) Pasquales-MacBook-Pro:newsapi pasqualespica$ python manage.py makemigrations
Migrations for 'news':
news/migrations/0001_initial.py
- Create model Article
(venv3) (base) Pasquales-MacBook-Pro:newsapi pasqualespica$ python manage.py migrate
Operations to perform:
Apply all migrations: admin, auth, contenttypes, news, sessions
Running migrations:
Applying contenttypes.0001_initial... OK
Applying auth.0001_initial... OK
Applying admin.0001_initial... OK
Applying admin.0002_logentry_remove_auto_add... OK
Applying admin.0003_logentry_add_action_flag_choices... OK
Applying contenttypes.0002_remove_content_type_name... OK
Applying auth.0002_alter_permission_name_max_length... OK
Applying auth.0003_alter_user_email_max_length... OK
Applying auth.0004_alter_user_username_opts... OK
Applying auth.0005_alter_user_last_login_null... OK
Applying auth.0006_require_contenttypes_0002... OK
Applying auth.0007_alter_validators_add_error_messages... OK
Applying auth.0008_alter_user_username_max_length... OK
Applying auth.0009_alter_user_last_name_max_length... OK
Applying auth.0010_alter_group_name_max_length... OK
Applying auth.0011_update_proxy_permissions... OK
Applying news.0001_initial... OK
Applying sessions.0001_initial... OKpoi creiamo superuser
(venv3) (base) Pasquales-MacBook-Pro:newsapi pasqualespica$ python manage.py createsuperuser
Username (leave blank to use 'pasqualespica'): admin
Email address:
Password:
Password (again):
The password is too similar to the username.
This password is too short. It must contain at least 8 characters.
This password is too common.
Bypass password validation and create user anyway? [y/N]: y
Superuser created successfully.poi registrare modelli in admin.py
(venv3) (base) Pasquales-MacBook-Pro:newsapi pasqualespica$ python manage.py shell
Python 3.8.1 (default, Feb 13 2020, 17:25:51)
[Clang 11.0.0 (clang-1100.0.33.17)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
(InteractiveConsole)
Serialize ...
>>> from news.models import Article
>>> from news.api.serializers import ArticleSerializer
>>> article_int = Article.objects.first()
>>> article_int
<Article: Mario Rossi i 20 anni mieei>
>>> ser_var = ArticleSerializer(article_int)
>>> ser_var
ArticleSerializer(<Article: Mario Rossi i 20 anni mieei>):
id = IntegerField(read_only=True)
author = CharField()
title = CharField()
description = CharField()
body = CharField()
location = CharField()
publication_date = DateField()
active = BooleanField()
created_at = DateTimeField(read_only=True)
updated_at = DateTimeField(read_only=True)
>>> ser_var.data
{'id': 1, 'author': 'Mario Rossi', 'title': 'i 20 anni mieei', 'description': 'Description 1', 'body': 'conetnuto', 'location': 'Italia', 'publication_date': '2020-02-25', 'active': True, 'created_at': '2020-02-25T14:44:43.234785Z'}
>>> from rest_framework.renderers import JSONRenderer
>>> json = JSONRenderer().render(ser_var.data)
>>> json
b'{"id":1,"author":"Mario Rossi","title":"i 20 anni mieei","description":"Description 1","body":"conetnuto","location":"Italia","publication_date":"2020-02-25","active":true,"created_at":"2020-02-25T14:44:43.234785Z"}Deserialize ...
>>> import io
>>> from rest_framework.parsers import JSONParser
>>> stream = io.BytesIO(json)
>>> data = JSONParser().parse(stream)
>>>
>>> serializer = ArticleSerializer(data=data)
>>> serializer.save()
Traceback (most recent call last):
File "<console>", line 1, in <module>
File "/Users/pasqualespica/my_data/PAS7B/my_workspaces/django-rest-framework-vue-js/03_DRF_LV_1/venv3/lib/python3.8/site-packages/rest_framework/serializers.py", line 177, in save
assert hasattr(self, '_errors'), (
AssertionError: You must call `.is_valid()` before calling `.save()`.
>>> serializer.is_valid()
True
>>> serializer.save()
{'author': 'Mario Rossi', 'title': 'i 20 anni mieei', 'description': 'Description 1', 'body': 'conetnuto', 'location': 'Italia', 'publication_date': datetime.date(2020, 2, 25), 'active': True}
<Article: Mario Rossi i 20 anni mieei>
>>>
>>> Article.objects.all()
<QuerySet [<Article: Mario Rossi i 20 anni mieei>, <Article: Mario Rossi i 20 anni mieei>]>
>>> (venv3) (base) Pasquales-MacBook-Pro:newsapi pasqualespica$ python manage.py shell
Python 3.8.1 (default, Feb 13 2020, 17:25:51)
[Clang 11.0.0 (clang-1100.0.33.17)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
(InteractiveConsole)
>>> from news.api.serializers import ArticleSerializer
>>> serializr = ArticleSerializer()
>>> print(repr(serializr))
ArticleSerializer():
time_since_publication = SerializerMethodField()
author = CharField(max_length=50)
title = CharField(max_length=120)
description = CharField(max_length=200)
body = CharField(style={'base_template': 'textarea.html'})
location = CharField(max_length=120)
publication_date = DateField()
active = BooleanField(required=False)
created_at = DateTimeField(read_only=True)CRUD Create, Read, Update, Delete
- GET : recuperare una risorsa
- POST : creare una nuova risorsa
- PUT / PATCH : aggiornare una risorsa
- DELETE : cancellare una risorsa
Detailed descriptions, with full methods and attributes, for each of Django REST Framework's class-based views and serializers. http://www.cdrf.co/
https://www.django-rest-framework.org/api-guide/permissions/#setting-the-permission-policy
https://www.django-rest-framework.org/api-guide/pagination/
https://www.django-rest-framework.org/api-guide/authentication/#how-authentication-is-determined
pip install django-rest-auth
pip install django-allauthhttps://www.django-rest-framework.org/api-guide/viewsets/ https://www.django-rest-framework.org/api-guide/routers/
con Vue.js le nostre APP sono reattive ( vedi console da inspect del web browser)
https://vuejs.org/v2/api/#v-on
https://vuejs.org/v2/api/#v-for
https://vuejs.org/v2/guide/class-and-style.html
https://vuejs.org/v2/api/#v-for
Per questo motivo Vue ci mette a disposizione le Computed Properties.
Simili ai methods che abbiamo già imparato ad utilizzare, si distinguono da questi per il fatto che i loro “risultati” vengono salvati in cache fino a che i valori da essi utilizzati non cambiano.
Chiamati talvolta anche computed values, possiamo pensare a questi come a un’estensione del nostro data model, utile a mostrare valori risultanti da elaborazioni.
È bene evitare di modificare i valori del data model tramite le computed properties, mantenendole leggere e “pure”.