Django builds a blog quickly and Django builds a blog

Django builds a blog quickly and Django builds a blog

If preparation:

1. Python

2. Django

3. Git

Install Python:

Download from official website

Install Django:

# Install Django $ pip install django in the latest version # or specify the installation version pip install-v django = 1.7.1

 

Now, createmy_blogDjango project:

$ django-admin.py startproject my_blog

Create a Django app (article ):

$ python manage.py startapp article

So far, the project structure is as follows:

── article│   ├── __init__.py│   ├── admin.py│   ├── migrations│   │   └── __init__.py│   ├── models.py│   ├── tests.py│   └── views.py├── db.sqlite3├── manage.py├── my_blog    ├── __init__.py    ├── __pycache__    │   ├── __init__.cpython-34.pyc    │   ├── settings.cpython-34.pyc    │   ├── urls.cpython-34.pyc    │   └── wsgi.cpython-34.pyc    ├── settings.py    ├── urls.py    └── wsgi.py

Add the new app under my_blog/setting. py:

INSTALLED_APPS = (... 'Article', # enter the app name here)

Run the program!Start the development server in Django:

$ python manage.py runserver 

　　

If the preceding interface is displayed, the operation is successful.

Command Summary

Python manage. py <command> [options] # Django Command python manange. py-h help document django-admin.py startproject my_blog # Create Project python manage. py startapp article # create app

Django Model:

• EveryDjango ModelAre inherited fromdjango.db.models.Model
• InModelEach of these attributesattributeAll represent a database field
• PassDjango Model APIYou can add, delete, modify, and query a database without writing some database query statements.

Set database:

After the Django project is built, the SQLite database is set by default. You can view and modify the database settings in my_blog/setting. py.

DATABASES = {    'default': {        'ENGINE': 'django.db.backends.sqlite3',        'NAME': os.path.join(BASE_DIR, 'db.sqlite3'),    }}

You can also set other databases, suchMySQL, PostgreSQLTo make it simple, use the default database settings.

Create models:

Write the following code in my_blog/article/models. py:

From django. db import models # Create your models here. class Article (models. model): title = models. charField (max_length = 100) # blog topic category = models. charField (max_length = 50, blank = True) # blog tag date_time = models. dateTimeField (auto_now_add = True) # blog date content = models. textField (blank = True, null = True) # blog post body # python2 use _ unicode __, python3 use _ str _ def _ str _ (self ): return self. title class Meta: # sort by time drop ordering = ['-date_time']

Where__str__(self)How does the function Article object express itself?<Article: Article object>This function tells the system to use the title field to represent the object.

• CharFieldUsed to store strings. max_length sets the maximum length.
• TextFieldUsed to store large volumes of text
• DateTimeFieldUsed for storage time. auto_now_add sets True to automatically set the object increase time.