如何用django.db(如何用django发送post请求)

发布网友 发布时间：2024-10-02 13:31

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热心网友 时间：2024-10-03 11:48

本篇文章给大家谈谈如何用django.db，以及如何用django发送post请求对应的知识点，希望对各位有所帮助，不要忘了收藏本站喔。

本文目录一览：

DATABASES = {

'default': {

'ENGINE': 'django.db.backends.sqlite3', # Add 'postgresql_psycopg2', 'mysql', 'sqlite3' or 'oracle'.

'NAME': 'demo.db',# Or path to database file if using sqlite3.

# The following settings are not used with sqlite3:

'USER': '',

'PASSWORD': '',

'HOST': '',# Empty for localhost through domain sockets or '127.0.0.1' for localhost through TCP.

'PORT': '',# Set to empty string for default.

}

}

INSTALLED_APPS = (

'django.contrib.auth',

'django.contrib.contenttypes',

'django.contrib.sessions',

'django.contrib.sites',

'django.contrib.messages',

'django.contrib.staticfiles',

# Uncomment the next line to enable the admin:

# 'django.contrib.admin',

# Uncomment the next line to enable admin documentation:

# 'django.contrib.admindocs',

'south',

'LearnSouth',

'books',

)

django使用已有的数据库表怎么建立model

在网上看到都是使用Django的models和makemigration，migrate命令来创建新表，并使用。可是我的数据已经存在了已经创建好，并且已经存储有数据了，不能再重新创建新表了。了解Django的表明和models名称的映射关系就可以让Django使用已经存在的表。

假如在Django存在models如下：

[python]?view plain?copy

from?django.db?import?models

#?Create?your?models?here.

class?Sciencenews(models.Model):

id?=?models.CharField(max_length=36,primary_key=True)

first_module?=?models.CharField(max_length=30,default="News")

second_module?=?models.CharField(max_length=30,default="Latest?News")

title?=?models.CharField(max_length=300)

author?=?models.CharField(max_length=60,null=True)

publish_date?=?models.CharField(max_length=35,null=True)

content?=?models.TextField(null=True)

crawl_date?=?models.CharField(max_length=35,null=True)

from_url?=?models.CharField(max_length=350,null=True)

执行数据迁移命令：

[python]?view plain?copy

python?manage.py?makemigration

python?manage.py?migrate

会在数据库中生成名称为show_sciencenews的数据表。show为应用名称，此处我的应用名称为show。可以看到Django创建表的命名规则：应用名_模型名。

我的存储爬取到的数据的表格名称原来为science_news,想要Django使用它，而不是创建新的表，只需要把的它的名称改为：应用名_要与该表映射的models名称，在此处我改为show_sciencenews。然后使用如上的数据迁移命令，这时可能会提示数据表已经存在的错误，不用理会，models已经和数据表映射上了。接下来只需要正常使用models和数据表就可以了。

错误描述

python==3.5

django==1.7

django创建项目时报错如下：

Traceback (most recent call last):

File "/root/envs/django-test/bin/django-admin", line 11, in module

sys.exit(execute_from_command_line())

File "/root/envs/django-test/lib/python3.5/site-packages/django/core/management/__init__.py", line 385, in execute_from_command_line

utility.execute()

File "/root/envs/django-test/lib/python3.5/site-packages/django/core/management/__init__.py", line 354, in execute

django.setup()

File "/root/envs/django-test/lib/python3.5/site-packages/django/__init__.py", line 18, in setup

from django.utils.log import configure_logging

File "/root/envs/django-test/lib/python3.5/site-packages/django/utils/log.py", line 10, in module

from django.views.debug import ExceptionReporter, get_exception_reporter_filter

File "/root/envs/django-test/lib/python3.5/site-packages/django/views/debug.py", line 10, in module

from django.http import (HttpResponse, HttpResponseServerError,

File "/root/envs/django-test/lib/python3.5/site-packages/django/http/__init__.py", line 4, in module

from django.http.response import (HttpResponse, StreamingHttpResponse,

File "/root/envs/django-test/lib/python3.5/site-packages/django/http/response.py", line 13, in module

from django.core.serializers.json import DjangoJSONEncoder

File "/root/envs/django-test/lib/python3.5/site-packages/django/core/serializers/__init__.py", line 23, in module

from django.core.serializers.base import SerializerDoesNotExist

File "/root/envs/django-test/lib/python3.5/site-packages/django/core/serializers/base.py", line 6, in module

from django.db import models

File "/root/envs/django-test/lib/python3.5/site-packages/django/db/models/__init__.py", line 6, in module

from django.db.models.query import Q, QuerySet, Prefetch# NOQA

File "/root/envs/django-test/lib/python3.5/site-packages/django/db/models/query.py", line 13, in module

from django.db.models.fields import AutoField, Empty

File "/root/envs/django-test/lib/python3.5/site-packages/django/db/models/fields/__init__.py", line 18, in module

from django import forms

File "/root/envs/django-test/lib/python3.5/site-packages/django/forms/__init__.py", line 6, in module

from django.forms.fields import *# NOQA

File "/root/envs/django-test/lib/python3.5/site-packages/django/forms/fields.py", line 18, in module

from django.forms.utils import from_current_timezone, to_current_timezone

File "/root/envs/django-test/lib/python3.5/site-packages/django/forms/utils.py", line 15, in module

from django.utils.html import format_html, format_html_join, escape

File "/root/envs/django-test/lib/python3.5/site-packages/django/utils/html.py", line 16, in module

from .html_parser import HTMLParser, HTMLParseError

File "/root/envs/django-test/lib/python3.5/site-packages/django/utils/html_parser.py", line 12, in module

HTMLParseError = _html_parser.HTMLParseError

AttributeError: module 'html.parser' has no attribute 'HTMLParseError'

(django-test) root@localhost:~/source/djangotest# django-admin startproject superlists

Traceback (most recent call last):

File "/root/envs/django-test/bin/django-admin", line 11, in module

sys.exit(execute_from_command_line())

File "/root/envs/django-test/lib/python3.5/site-packages/django/core/management/__init__.py", line 385, in execute_from_command_line

utility.execute()

File "/root/envs/django-test/lib/python3.5/site-packages/django/core/management/__init__.py", line 354, in execute

django.setup()

File "/root/envs/django-test/lib/python3.5/site-packages/django/__init__.py", line 18, in setup

from django.utils.log import configure_logging

File "/root/envs/django-test/lib/python3.5/site-packages/django/utils/log.py", line 10, in module

from django.views.debug import ExceptionReporter, get_exception_reporter_filter

File "/root/envs/django-test/lib/python3.5/site-packages/django/views/debug.py", line 10, in module

from django.http import (HttpResponse, HttpResponseServerError,

File "/root/envs/django-test/lib/python3.5/site-packages/django/http/__init__.py", line 4, in module

from django.http.response import (HttpResponse, StreamingHttpResponse,

File "/root/envs/django-test/lib/python3.5/site-packages/django/http/response.py", line 13, in module

from django.core.serializers.json import DjangoJSONEncoder

File "/root/envs/django-test/lib/python3.5/site-packages/django/core/serializers/__init__.py", line 23, in module

from django.core.serializers.base import SerializerDoesNotExist

File "/root/envs/django-test/lib/python3.5/site-packages/django/core/serializers/base.py", line 6, in module

from django.db import models

File "/root/envs/django-test/lib/python3.5/site-packages/django/db/models/__init__.py", line 6, in module

from django.db.models.query import Q, QuerySet, Prefetch# NOQA

File "/root/envs/django-test/lib/python3.5/site-packages/django/db/models/query.py", line 13, in module

from django.db.models.fields import AutoField, Empty

File "/root/envs/django-test/lib/python3.5/site-packages/django/db/models/fields/__init__.py", line 18, in module

from django import forms

File "/root/envs/django-test/lib/python3.5/site-packages/django/forms/__init__.py", line 6, in module

from django.forms.fields import *# NOQA

File "/root/envs/django-test/lib/python3.5/site-packages/django/forms/fields.py", line 18, in module

from django.forms.utils import from_current_timezone, to_current_timezone

File "/root/envs/django-test/lib/python3.5/site-packages/django/forms/utils.py", line 15, in module

from django.utils.html import format_html, format_html_join, escape

File "/root/envs/django-test/lib/python3.5/site-packages/django/utils/html.py", line 16, in module

from .html_parser import HTMLParser, HTMLParseError

File "/root/envs/django-test/lib/python3.5/site-packages/django/utils/html_parser.py", line 12, in module

HTMLParseError = _html_parser.HTMLParseError

AttributeError: module 'html.parser' has no attribute 'HTMLParseError'12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364656667686970717273747576771234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071727374757677

原因

HTMLParseError在pythons3.5已经没有了

解决方法

将python版本回退到3.3或3.4

升级django版本

1. 安装Django

[plain] view plain copy

cd Django-1.4

python setup.py install

2. 安装postgresql的客户端：

[plain] view plain copy

sudo apt-get install -y postgresql-client-9.1 python-psycopg2

3. 新建project:

[plain] view plain copy

django-admin.py startproject myproject

4. 在myproject下新建app:

[plain] view plain copy

python manage.py startapp myapp

4. 新增环境变量：

编辑/etc/profile文件，在末尾加入以下语句：

[plain] view plain copy

span style="color:#FF0000;"export PYTHONPATH=$PYTHONPATH:/home/yc/src/myproject

export DJANGO_SETTINGS_MODULE=mypro