用django创建一个简单的sns

用django创建一个简单的sns

1.首先创建一个工程newsns

django-admin.py startproject newsns

在工程目录下新建一个文件夹templates，在该文件夹下创建一个模版index.html：

<title>newsns -by django</title>
<h1><font color=#{{color}}>Django, my first django program.</font></h1>

参照上篇文章中创建模版的方法，将app目录下的settings.py文件、views.py文件和urls.py文件进行相应设置。

2.创建数据库，配置数据

在app目录下的settings.py中进行如下设置

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.mysql', # Add 'postgresql_psycopg2', 'mysql', 'sqlite3' or 'oracle'.
        'NAME': 'newsns',                      # Or path to database file if using sqlite3.
        'USER': 'root',                      # Not used with sqlite3.
        'PASSWORD': '***',                  #密码.
        'HOST': 'localhost',                      # Set to empty string for localhost. Not used with sqlite3.
        'PORT': '',                      # Set to empty string for default. Not used with sqlite3.
    }
}

增加app newsns:

 1 INSTALLED_APPS = (
 2     'django.contrib.auth',
 3     'django.contrib.contenttypes',
 4     'django.contrib.sessions',
 5     'django.contrib.sites',
 6     'django.contrib.messages',
 7     'django.contrib.staticfiles',
 8     # Uncomment the next line to enable the admin:
 9     # 'django.contrib.admin',
10     # Uncomment the next line to enable admin documentation:
11     # 'django.contrib.admindocs',
12     'newsns',
13 )

在控制台中使用mysql命令创建数据库newsns

mysql> create database newsns default character set utf8 collate utf8_general_ci;
Query OK, 1 row affected (0.03 sec)

然后在app目录下创建一个models.py文件，该文件创建了3个类，实际上每个类代表一个表格，类的字段为表的字段。

 1 from django.db import models
 2 
 3 class Publisher(models.Model):
 4     name = models.CharField(max_length=30)
 5     address = models.CharField(max_length=50)
 6     city = models.CharField(max_length=60)
 7     state_province = models.CharField(max_length=30)
 8     country = models.CharField(max_length=50)
 9     website = models.URLField()
10 
11 class Author(models.Model):
12     first_name = models.CharField(max_length=30)
13     last_name = models.CharField(max_length=40)
14     email = models.EmailField()
15 
16 class Book(models.Model):
17     title = models.CharField(max_length=100)
18     authors = models.ManyToManyField(Author)
19     publisher = models.ForeignKey(Publisher)
20     publication_date = models.DateField()

在控制台输入以下命令，按照要求输入帐号、密码，建立上述表格：

***@Android:~/newsns# python manage.py validate
0 errors found
***@Android:~/newsns# python manage.py syncdb

创建好表格后我们在manage.py shell中进行测试：

 1 ***@Android:~/newsns# python manage.py shell
 2 Python 2.7.3 (default, Aug  1 2012, 05:14:39) 
 3 Type "copyright", "credits" or "license" for more information.
 4 
 5 IPython 0.13.1 -- An enhanced Interactive Python.
 6 ?         -> Introduction and overview of IPython's features.
 7 %quickref -> Quick reference.
 8 help      -> Python's own help system.
 9 object?   -> Details about 'object', use 'object??' for extra details.
10 
11 In [1]: from newsns.models import Publisher
12 
13 In [2]: p = Publisher(name = 'Jim', city = 'beijing')
14 
15 In [3]: p.save()
16 
17 In [4]: l = Publisher.objects.all()
18 
19 In [5]: for n in l:
20    ...:     print n.name
21    ...:     
22 Jim

好了，测试无误。

 

 

分类: python

标签: django