20170901 django流程之model以及实例
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<4>生成同步数据库的脚本：python manage.py makemigrations
同步数据库: python manage.py migrate
注意：在开发过程中，数据库同步误操作之后，难免会遇到后面不能同步成功的情况，解决这个问题的一个简单粗暴方法是把migrations目录下
的脚本（除__init__.py之外）全部删掉，再把数据库删掉之后创建一个新的数据库，数据库同步操作再重新做一遍。
<5>当我们访问http://127.0.0.1:8080/admin/时，会出现：
所以我们需要为进入这个项目的后台创建超级管理员：python manage.py createsuperuser，设置好用户名和密码后便可登录啦！
<6>清空数据库：python manage.py flush
<7>查询某个命令的详细信息： django-admin.py help startapp
admin 是Django 自带的一个后台数据库管理系统。
<8>启动交互界面 ：python manage.py shell
这个命令和直接运行 python 进入 shell 的区别是：你可以在这个 shell 里面调用当前项目的 models.py 中的 API，对于操作数据，还有一些小测试非常方便。
<9>终端上输入python manage.py 可以看到详细的列表，在忘记子名称的时候特别有用。
实例练习1－提交数据并展示
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<h1>创建个人信息</h1>
<form action="/userInfor/" method="post">
<p>姓名<input type="text" name="username"></p>
<p>性别<input type="text" name="sex"></p>
<p>邮箱<input type="text" name="email"></p>
<p><input type="submit" value="submit"></p>
</form>
<hr>
<h1>信息展示</h1>
<table border="1">
<tr>
<td>姓名</td>
<td>性别</td>
<td>邮箱</td>
</tr>
{% for i in info_list %}
<tr>
<td>{{ i.username }}</td>
<td>{{ i.sex }}</td>
<td>{{ i.email }}</td>
</tr>
{% endfor %}
</table>
</body>
</html>
-----------------------url.py---------------------------------------
url(r‘^userInfor/‘, views.userInfor)
-----------------------views.py--------------------------------------
info_list=[]
def userInfor(req):
if req.method=="POST":
username=req.POST.get("username",None)
sex=req.POST.get("sex",None)
email=req.POST.get("email",None)
info={"username":username,"sex":sex,"email":email}
info_list.append(info)
return render(req,"userInfor.html",{"info_list":info_list})<wiz_code_mirror>
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<title>Title</title>
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</head>
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<body>
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<h1>创建个人信息</h1>
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<form action="/userInfor/" method="post">
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<p>姓名<input type="text" name="username"></p>
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<p>性别<input type="text" name="sex"></p>
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<p>邮箱<input type="text" name="email"></p>
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<p><input type="submit" value="submit"></p>
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</form>
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<hr>
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<h1>信息展示</h1>
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<table border="1">
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<tr>
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<td>姓名</td>
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<td>性别</td>
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<td>邮箱</td>
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</tr>
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{% for i in info_list %}
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<tr>
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<td>{{ i.username }}</td>
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<td>{{ i.sex }}</td>
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<td>{{ i.email }}</td>
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</tr>
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{% endfor %}
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</table>
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</body>
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</html>
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-----------------------url.py---------------------------------------
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url(r‘^userInfor/‘, views.userInfor)
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-----------------------views.py--------------------------------------
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info_list=[]
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def userInfor(req):
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if req.method=="POST":
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username=req.POST.get("username",None)
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sex=req.POST.get("sex",None)
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email=req.POST.get("email",None)
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info={"username":username,"sex":sex,"email":email}
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info_list.append(info)
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return render(req,"userInfor.html",{"info_list":info_list})
实例练习2－提交数据并展示(数据库)
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<h1>创建个人信息</h1>
<form action="/userInfor/" method="post">
<p>姓名<input type="text" name="username"></p>
<p>性别<input type="text" name="sex"></p>
<p>邮箱<input type="text" name="email"></p>
<p><input type="submit" value="submit"></p>
</form>
<hr>
<h1>信息展示</h1>
<table border="1">
<tr>
<td>姓名</td>
<td>性别</td>
<td>邮箱</td>
</tr>
{% for i in info_list %}
<tr>
<td>{{ i.username }}</td>
<td>{{ i.sex }}</td>
<td>{{ i.email }}</td>
</tr>
{% endfor %}
</table>
</body>
</html>
----------------------------------------------models.py
from django.db import models
# Create your models here.
class UserInfor(models.Model):
username=models.CharField(max_length=64)
sex=models.CharField(max_length=64)
email=models.CharField(max_length=64)
----------------------------------------------views.py
from django.shortcuts import render
from app01 import models
# Create your views here.
def userInfor(req):
if req.method=="POST":
u=req.POST.get("username",None)
s=req.POST.get("sex",None)
e=req.POST.get("email",None)
#---------表中插入数据方式一
# info={"username":u,"sex":e,"email":e}
# models.UserInfor.objects.create(**info)
#---------表中插入数据方式二
models.UserInfor.objects.create(
username=u,
sex=s,
email=e
)
info_list=models.UserInfor.objects.all()
return render(req,"userInfor.html",{"info_list":info_list})
return render(req,"userInfor.html")<wiz_code_mirror>
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1
<!DOCTYPE html>
2
<html lang="en">
3
<head>
4
<meta charset="UTF-8">
5
<title>Title</title>
6
</head>
7
<body>
8
<h1>创建个人信息</h1>
9
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<form action="/userInfor/" method="post">
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12
<p>姓名<input type="text" name="username"></p>
13
<p>性别<input type="text" name="sex"></p>
14
<p>邮箱<input type="text" name="email"></p>
15
<p><input type="submit" value="submit"></p>
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</form>
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<hr>
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21
<h1>信息展示</h1>
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23
<table border="1">
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25
<tr>
26
<td>姓名</td>
27
<td>性别</td>
28
<td>邮箱</td>
29
</tr>
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{% for i in info_list %}
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<tr>
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<td>{{ i.username }}</td>
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<td>{{ i.sex }}</td>
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<td>{{ i.email }}</td>
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</tr>
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{% endfor %}
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</table>
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</body>
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</html>
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----------------------------------------------models.py
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from django.db import models
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# Create your models here.
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class UserInfor(models.Model):
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username=models.CharField(max_length=64)
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sex=models.CharField(max_length=64)
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email=models.CharField(max_length=64)
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----------------------------------------------views.py
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from django.shortcuts import render
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from app01 import models
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# Create your views here.
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def userInfor(req):
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if req.method=="POST":
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u=req.POST.get("username",None)
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s=req.POST.get("sex",None)
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e=req.POST.get("email",None)
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#---------表中插入数据方式一
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# info={"username":u,"sex":e,"email":e}
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# models.UserInfor.objects.create(**info)
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#---------表中插入数据方式二
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models.UserInfor.objects.create(
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username=u,
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sex=s,
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email=e
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)
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info_list=models.UserInfor.objects.all()
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return render(req,"userInfor.html",{"info_list":info_list})
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return render(req,"userInfor.html")