8、Python Django數據庫添加查詢

時間 2020-10-25

標籤 html python web shell 數據庫 django ide oop url 欄目 Python 简体版

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Python Django數據庫添加查詢html

對數據進行操做python

1、建立記錄web

# pwdshell

/root/csvt03數據庫

# ipython manage.py shelldjango

In [1]: from blog.models import Employeeide

#(第一種方法)oop

In [2]: Employeeui

Out[2]: blog.models.Employeeurl

In [3]: emp = Employee()

In [4]: emp.name = 'Alen'

In [5]: emp.save()

#(第二種方法)

In [6]: emp = Employee(name='Tom')

In [7]: emp.save()

#(第三種方法)

調用管理器create

In [8]: Employee.objects.create(name='Max')

查詢數據庫已經建立了記錄

2、查詢記錄

# ipython manage.py shell

In [13]: emps = Employee.objects.all()

In [14]: emps

Out[14]: [<Employee: Employee object>, <Employee: Employee object>, <Employee: Employee object>, <Employee: Employee object>]

In [16]: emps[0].id

Out[16]: 1L

In [17]: emps[0].name

Out[17]: u'Alen'

In [18]: emps[1].name

Out[18]: u'Tom'

In [19]: emps[2].name

Out[19]: u'Max'

# cat blog/models.py

from django.db import models

class Employee(models.Model):

name = models.CharField(max_length=20)

def __unicode__(self): # 經過__unicode__使查詢出來的數據以字符串的方式顯示

return self.name

# ipython manage.py shell

In [1]: from blog.models import Employee

In [2]: emp = Employee.objects.all()

In [3]: emp

Out[3]: [<Employee: Alen>, <Employee: Tom>, <Employee: Max>, <Employee: Sumer>]

3、傳遞到web頁面顯示查詢結果

# 添加URL，以及添加index.html模板文件

# egrep -v "#|^$" urls.py

from django.conf.urls.defaults import patterns, include, url

urlpatterns = patterns('',

url(r'^index/$','blog.views.index'),

)

# egrep -v "#|^$" blog/models.py

from django.db import models

class Employee(models.Model):

name = models.CharField(max_length=20)

def __unicode__(self):

return self.name

# egrep -v "#|^$" blog/templates/index.html

<head>

<title>Loyu Django test</title>

</head>

<body>

{% for emp in emps %}

<div>`forloop`.`counter`:`emp`</div>

{% endfor %}

</body>

</html>

4、啓動項目

# nohup python manage.py runserver & (使用nohup支持後臺啓動)

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