from sqlalchemy.ext.declarative import declarative_base<\/p>\nfrom sqlalchemy import Column, Integer, String<\/p>\n
Base = declarative_base()<\/p>\n
class YourTable(Base):<\/p>\n
__tablename__ = 'your_table'<\/p>\n
id = Column(Integer, primary_key=True)<\/p>\n
name = Column(String)<\/p>\n
<\/code><\/pre>\n<\/p>\n
2.4 \u6267\u884c\u67e5\u8be2<\/h4>\n<\/p>\n
results = session.query(YourTable).all()<\/p>\nfor row in results:<\/p>\n
print(row.name)<\/p>\n
<\/code><\/pre>\n<\/p>\n
2.5 \u5173\u95ed\u4f1a\u8bdd<\/h4>\n<\/p>\n
session.close()<\/p>\n<\/code><\/pre>\n<\/p>\n
3. \u4f7f\u7528Django ORM\u8fde\u63a5\u6570\u636e\u5e93<\/h3>\n<\/p>\n
3.1 \u914d\u7f6eDjango\u9879\u76ee<\/h4>\n<\/p>\n
\u9996\u5148\uff0c\u521b\u5efa\u4e00\u4e2aDjango\u9879\u76ee\uff1a<\/p>\n<\/p>\n
django-admin startproject myproject<\/p>\ncd myproject<\/p>\n
<\/code><\/pre>\n<\/p>\n
3.2 \u914d\u7f6e\u6570\u636e\u5e93\u8fde\u63a5<\/h4>\n<\/p>\n
\u5728 settings.py<\/code> \u6587\u4ef6\u4e2d\u914d\u7f6e\u6570\u636e\u5e93\u8fde\u63a5\u4fe1\u606f\uff1a<\/p>\n<\/p>\nDATABASES = {<\/p>\n 'default': {<\/p>\n
'ENGINE': 'django.db.backends.mysql',<\/p>\n
'NAME': 'your_database',<\/p>\n
'USER': 'your_username',<\/p>\n
'PASSWORD': 'your_password',<\/p>\n
'HOST': 'your_host',<\/p>\n
'PORT': 'your_port',<\/p>\n
}<\/p>\n
}<\/p>\n
<\/code><\/pre>\n<\/p>\n
3.3 \u521b\u5efa\u5e94\u7528\u5e76\u5b9a\u4e49\u6a21\u578b<\/h4>\n<\/p>\n
python manage.py startapp myapp<\/p>\n<\/code><\/pre>\n<\/p>\n
\u5728 myapp\/models.py<\/code> \u6587\u4ef6\u4e2d\u5b9a\u4e49\u6a21\u578b\uff1a<\/p>\n<\/p>\nfrom django.db import models<\/p>\nclass YourTable(models.Model):<\/p>\n
name = models.CharField(max_length=100)<\/p>\n
<\/code><\/pre>\n<\/p>\n
3.4 \u8fc1\u79fb\u6570\u636e\u5e93<\/h4>\n<\/p>\n
python manage.py makemigrations<\/p>\npython manage.py migrate<\/p>\n
<\/code><\/pre>\n<\/p>\n
3.5 \u6267\u884c\u67e5\u8be2<\/h4>\n<\/p>\n
\u5728 myapp\/views.py<\/code> \u6587\u4ef6\u4e2d\u6267\u884c\u67e5\u8be2\uff1a<\/p>\n<\/p>\nfrom .models import YourTable<\/p>\ndef my_view(request):<\/p>\n
results = YourTable.objects.all()<\/p>\n
for row in results:<\/p>\n
print(row.name)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4e09\u3001\u914d\u7f6e\u6570\u636e\u5e93\u8fde\u63a5\u5b57\u7b26\u4e32<\/h2>\n<\/p>\n
1. MySQL\u6570\u636e\u5e93\u8fde\u63a5\u5b57\u7b26\u4e32<\/h3>\n<\/p>\n
\u5bf9\u4e8eMySQL\u6570\u636e\u5e93\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32\u683c\u5f0f\u5982\u4e0b\uff1a<\/p>\n<\/p>\n
'mysql+mysqlconnector:\/\/your_username:your_password@your_host\/your_database'<\/p>\n<\/code><\/pre>\n<\/p>\n
2. PostgreSQL\u6570\u636e\u5e93\u8fde\u63a5\u5b57\u7b26\u4e32<\/h3>\n<\/p>\n
\u5bf9\u4e8ePostgreSQL\u6570\u636e\u5e93\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32\u683c\u5f0f\u5982\u4e0b\uff1a<\/p>\n<\/p>\n
'postgresql+psycopg2:\/\/your_username:your_password@your_host\/your_database'<\/p>\n<\/code><\/pre>\n<\/p>\n
3. SQL Server\u6570\u636e\u5e93\u8fde\u63a5\u5b57\u7b26\u4e32<\/h3>\n<\/p>\n
\u5bf9\u4e8eSQL Server\u6570\u636e\u5e93\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32\u683c\u5f0f\u5982\u4e0b\uff1a<\/p>\n<\/p>\n
'mssql+pyodbc:\/\/your_username:your_password@your_host\/your_database?driver=SQL+Server'<\/p>\n<\/code><\/pre>\n<\/p>\n
4. SQLite\u6570\u636e\u5e93\u8fde\u63a5\u5b57\u7b26\u4e32<\/h3>\n<\/p>\n
\u5bf9\u4e8eSQLite\u6570\u636e\u5e93\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32\u683c\u5f0f\u5982\u4e0b\uff1a<\/p>\n<\/p>\n
'sqlite:\/\/\/your_database_file'<\/p>\n<\/code><\/pre>\n<\/p>\n
\u56db\u3001\u5904\u7406\u6570\u636e\u5e93\u8fde\u63a5\u9519\u8bef<\/h2>\n<\/p>\n
\u5728\u5efa\u7acb\u6570\u636e\u5e93\u8fde\u63a5\u65f6\uff0c\u53ef\u80fd\u4f1a\u9047\u5230\u5404\u79cd\u9519\u8bef\uff0c\u5982\u8fde\u63a5\u8d85\u65f6\u3001\u8ba4\u8bc1\u5931\u8d25\u7b49\u3002\u53ef\u4ee5\u4f7f\u7528\u5f02\u5e38\u5904\u7406\u673a\u5236\u6765\u6355\u83b7\u5e76\u5904\u7406\u8fd9\u4e9b\u9519\u8bef\u3002<\/p>\n<\/p>\n
try:<\/p>\n cnx = mysql.connector.connect(config)<\/p>\n
cursor = cnx.cursor()<\/p>\n
cursor.execute(query)<\/p>\n
for row in cursor.fetchall():<\/p>\n
print(row)<\/p>\n
except mysql.connector.Error as err:<\/p>\n
print(f"Error: {err}")<\/p>\n
finally:<\/p>\n
if cursor:<\/p>\n
cursor.close()<\/p>\n
if cnx:<\/p>\n
cnx.close()<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4e94\u3001\u4f7f\u7528\u73af\u5883\u53d8\u91cf\u4fdd\u62a4\u654f\u611f\u4fe1\u606f<\/h2>\n<\/p>\n
\u4e3a\u4e86\u4fdd\u62a4\u6570\u636e\u5e93\u8fde\u63a5\u7684\u654f\u611f\u4fe1\u606f\uff0c\u5982\u7528\u6237\u540d\u548c\u5bc6\u7801\uff0c\u53ef\u4ee5\u4f7f\u7528\u73af\u5883\u53d8\u91cf\u6765\u5b58\u50a8\u8fd9\u4e9b\u4fe1\u606f\u3002<\/p>\n<\/p>\n
1. \u8bbe\u7f6e\u73af\u5883\u53d8\u91cf<\/h3>\n<\/p>\n
\u5728\u64cd\u4f5c\u7cfb\u7edf\u4e2d\u8bbe\u7f6e\u73af\u5883\u53d8\u91cf\uff1a<\/p>\n<\/p>\n
export DB_USER='your_username'<\/p>\nexport DB_PASSWORD='your_password'<\/p>\n
export DB_HOST='your_host'<\/p>\n
export DB_NAME='your_database'<\/p>\n
<\/code><\/pre>\n<\/p>\n
2. \u5728Python\u811a\u672c\u4e2d\u8bfb\u53d6\u73af\u5883\u53d8\u91cf<\/h3>\n<\/p>\n
import os<\/p>\nconfig = {<\/p>\n
'user': os.getenv('DB_USER'),<\/p>\n
'password': os.getenv('DB_PASSWORD'),<\/p>\n
'host': os.getenv('DB_HOST'),<\/p>\n
'database': os.getenv('DB_NAME'),<\/p>\n
'raise_on_warnings': True<\/p>\n
}<\/p>\n
cnx = mysql.connector.connect(config)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u901a\u8fc7\u4e0a\u8ff0\u65b9\u6cd5\uff0c\u4f60\u53ef\u4ee5\u5b89\u5168\u5730\u4fdd\u62a4\u6570\u636e\u5e93\u8fde\u63a5\u7684\u654f\u611f\u4fe1\u606f\u3002<\/p>\n<\/p>\n
\u516d\u3001\u4f7f\u7528\u8fde\u63a5\u6c60\u63d0\u9ad8\u6027\u80fd<\/h2>\n<\/p>\n
\u5728\u9ad8\u5e76\u53d1\u573a\u666f\u4e0b\uff0c\u9891\u7e41\u5efa\u7acb\u548c\u5173\u95ed\u6570\u636e\u5e93\u8fde\u63a5\u4f1a\u5bfc\u81f4\u6027\u80fd\u95ee\u9898\u3002\u53ef\u4ee5\u4f7f\u7528\u8fde\u63a5\u6c60\u6765\u590d\u7528\u6570\u636e\u5e93\u8fde\u63a5\uff0c\u63d0\u9ad8\u6027\u80fd\u3002<\/p>\n<\/p>\n
1. \u4f7f\u7528SQLAlchemy\u8fde\u63a5\u6c60<\/h3>\n<\/p>\n
SQLAlchemy\u9ed8\u8ba4\u652f\u6301\u8fde\u63a5\u6c60\uff0c\u65e0\u9700\u989d\u5916\u914d\u7f6e\u3002\u53ef\u4ee5\u901a\u8fc7\u8bbe\u7f6e pool_size<\/code> \u53c2\u6570\u6765\u6307\u5b9a\u8fde\u63a5\u6c60\u7684\u5927\u5c0f\uff1a<\/p>\n<\/p>\nengine = create_engine('mysql+mysqlconnector:\/\/your_username:your_password@your_host\/your_database', pool_size=10)<\/p>\n<\/code><\/pre>\n<\/p>\n
2. \u4f7f\u7528mysql.connector\u8fde\u63a5\u6c60<\/h3>\n<\/p>\n
\u5bf9\u4e8e mysql.connector<\/code>\uff0c\u53ef\u4ee5\u4f7f\u7528 mysql.connector.pooling<\/code> \u6a21\u5757\u6765\u521b\u5efa\u8fde\u63a5\u6c60\uff1a<\/p>\n<\/p>\nfrom mysql.connector import pooling<\/p>\nconfig = {<\/p>\n
'user': 'your_username',<\/p>\n
'password': 'your_password',<\/p>\n
'host': 'your_host',<\/p>\n
'database': 'your_database'<\/p>\n
}<\/p>\n
cnxpool = pooling.MySQLConnectionPool(pool_name="mypool", pool_size=10, config)<\/p>\n
cnx = cnxpool.get_connection()<\/p>\n
cursor = cnx.cursor()<\/p>\n
cursor.execute(query)<\/p>\n
for row in cursor.fetchall():<\/p>\n
print(row)<\/p>\n
cursor.close()<\/p>\n
cnx.close()<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u901a\u8fc7\u4f7f\u7528\u8fde\u63a5\u6c60\uff0c\u53ef\u4ee5\u663e\u8457\u63d0\u9ad8\u6570\u636e\u5e93\u64cd\u4f5c\u7684\u6027\u80fd\uff0c\u7279\u522b\u662f\u5728\u9ad8\u5e76\u53d1\u573a\u666f\u4e0b\u3002<\/p>\n<\/p>\n
\u4e03\u3001\u603b\u7ed3<\/h2>\n<\/p>\n
\u901a\u8fc7\u672c\u6587\u7684\u4ecb\u7ecd\uff0c\u6211\u4eec\u8be6\u7ec6\u63a2\u8ba8\u4e86Python\u5982\u4f55\u8fde\u63a5\u5728\u7ebf\u6570\u636e\u5e93\u7684\u65b9\u6cd5\uff0c\u5305\u62ec\u4f7f\u7528\u6570\u636e\u5e93\u9a71\u52a8\u7a0b\u5e8f\u3001\u4f7f\u7528ORM\u6846\u67b6\u3001\u914d\u7f6e\u6570\u636e\u5e93\u8fde\u63a5\u5b57\u7b26\u4e32\u3001\u5904\u7406\u6570\u636e\u5e93\u8fde\u63a5\u9519\u8bef\u3001\u4f7f\u7528\u73af\u5883\u53d8\u91cf\u4fdd\u62a4\u654f\u611f\u4fe1\u606f\u4ee5\u53ca\u4f7f\u7528\u8fde\u63a5\u6c60\u63d0\u9ad8\u6027\u80fd\u7b49\u3002\u5e0c\u671b\u8fd9\u4e9b\u5185\u5bb9\u80fd\u591f\u5e2e\u52a9\u4f60\u66f4\u597d\u5730\u638c\u63e1Python\u8fde\u63a5\u5728\u7ebf\u6570\u636e\u5e93\u7684\u6280\u672f\uff0c\u63d0\u9ad8\u5f00\u53d1\u6548\u7387\u548c\u4ee3\u7801\u8d28\u91cf\u3002<\/p>\n<\/p>\n
\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n \u5982\u4f55\u9009\u62e9\u5408\u9002\u7684\u5728\u7ebf\u6570\u636e\u5e93\u8fdb\u884c\u8fde\u63a5\uff1f<\/strong>
\u9009\u62e9\u5728\u7ebf\u6570\u636e\u5e93\u65f6\uff0c\u9700\u8981\u8003\u8651\u591a\u4e2a\u56e0\u7d20\uff0c\u5305\u62ec\u6570\u636e\u5e93\u7684\u7c7b\u578b\uff08\u5982MySQL\u3001PostgreSQL\u3001MongoDB\u7b49\uff09\u3001\u6027\u80fd\u3001\u53ef\u6269\u5c55\u6027\u3001\u8d39\u7528\u3001\u6570\u636e\u5b89\u5168\u6027\u4ee5\u53ca\u652f\u6301\u7684\u7f16\u7a0b\u8bed\u8a00\u3002\u786e\u4fdd\u6240\u9009\u6570\u636e\u5e93\u80fd\u4e0ePython\u517c\u5bb9\uff0c\u5e76\u67e5\u770b\u76f8\u5173\u6587\u6863\u4ee5\u83b7\u53d6\u8fde\u63a5\u793a\u4f8b\u548c\u6700\u4f73\u5b9e\u8df5\u3002<\/p>\n\u5728Python\u4e2d\u8fde\u63a5\u5728\u7ebf\u6570\u636e\u5e93\u65f6\u9700\u8981\u54ea\u4e9b\u5e93\uff1f<\/strong>
\u4e0d\u540c\u7c7b\u578b\u7684\u5728\u7ebf\u6570\u636e\u5e93\u9700\u8981\u4e0d\u540c\u7684Python\u5e93\u3002\u4f8b\u5982\uff0c\u4f7f\u7528MySQL\u65f6\u53ef\u4ee5\u9009\u62e9mysql-connector-python<\/code>\u6216PyMySQL<\/code>\uff0c\u800cPostgreSQL\u5219\u53ef\u4ee5\u4f7f\u7528psycopg2<\/code>\u6216SQLAlchemy<\/code>\u3002\u786e\u4fdd\u5b89\u88c5\u6240\u9700\u7684\u5e93\uff0c\u5e76\u67e5\u770b\u5176\u6587\u6863\u4ee5\u4e86\u89e3\u5982\u4f55\u8fdb\u884c\u8fde\u63a5\u548c\u64cd\u4f5c\u3002<\/p>\n\u5982\u4f55\u5904\u7406Python\u8fde\u63a5\u5728\u7ebf\u6570\u636e\u5e93\u65f6\u7684\u5e38\u89c1\u9519\u8bef\uff1f<\/strong>
\u5728\u8fde\u63a5\u5728\u7ebf\u6570\u636e\u5e93\u65f6\uff0c\u53ef\u80fd\u4f1a\u9047\u5230\u591a\u79cd\u9519\u8bef\uff0c\u5982\u7f51\u7edc\u8fde\u63a5\u95ee\u9898\u3001\u8ba4\u8bc1\u5931\u8d25\u6216\u6570\u636e\u5e93\u914d\u7f6e\u9519\u8bef\u3002\u68c0\u67e5\u6570\u636e\u5e93\u7684\u8fde\u63a5\u5b57\u7b26\u4e32\u3001\u7528\u6237\u540d\u548c\u5bc6\u7801\u662f\u5426\u6b63\u786e\uff0c\u540c\u65f6\u786e\u4fdd\u7f51\u7edc\u8bbe\u7f6e\u548c\u9632\u706b\u5899\u5141\u8bb8\u8be5\u8fde\u63a5\u3002\u6b64\u5916\uff0c\u67e5\u770b\u6570\u636e\u5e93\u7684\u65e5\u5fd7\u6587\u4ef6\u4e5f\u80fd\u5e2e\u52a9\u8bc6\u522b\u95ee\u9898\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"Python\u8fde\u63a5\u5728\u7ebf\u6570\u636e\u5e93\u7684\u65b9\u6cd5\u6709\uff1a\u4f7f\u7528\u6570\u636e\u5e93\u9a71\u52a8\u7a0b\u5e8f\u3001\u4f7f\u7528ORM\u6846\u67b6\u3001\u914d\u7f6e\u6570\u636e\u5e93\u8fde\u63a5\u5b57\u7b26\u4e32\uff0c\u5176\u4e2d\u4f7f\u7528\u6570\u636e\u5e93\u9a71 […]","protected":false},"author":3,"featured_media":1029459,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[37],"tags":[],"acf":[],"_links":{"self":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1029452"}],"collection":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/comments?post=1029452"}],"version-history":[{"count":"1","href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1029452\/revisions"}],"predecessor-version":[{"id":1029461,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1029452\/revisions\/1029461"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/1029459"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=1029452"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=1029452"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=1029452"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
![\"python\u5982\u4f55\u8fde\u63a5\u5728\u7ebf\u6570\u636e\u5e93\"](\"https:\/\/cdn-docs.pingcode.com\/wp-content\/uploads\/2024\/12\/bd9cb8ce-b6de-4343-9ce4-6ef55965ff4c.webp?x-oss-process=image\/auto-orient,1\/format,webp\")
<\/p>\n