Sanic 连接postgresql数据库
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1.安装系统包 # yum install postgresql-devel 2.安装Python包 peewee-2.8.5.tar.gz psycopg2-2.6.2.tar.gz 1).安装peewee-async # pip install peewee-async Collecting peewee-async Downloading peewee_async-0.5.6-py3-none-any.whl Requirement already satisfied: peewee>=2.8.0 in /usr/local/lib/python3.5/site-packages (from peewee-async) Installing collected packages: peewee-async Successfully installed peewee-async-0.5.6 # 2).安装aiopg # pip install aiopg Collecting aiopg Using cached aiopg-0.13.0-py3-none-any.whl Requirement already satisfied: psycopg2>=2.5.2 in /usr/local/lib/python3.5/site-packages/psycopg2-2.6.2-py3.5-linux-x86_64.egg (from aiopg) Installing collected packages: aiopg Successfully installed aiopg-0.13.0 # 3.目录结构 /home/webapp |--main.py |--my_blueprint.py templates |--index.html 4.文件内容： 1).main.py # more main.py from sanic import Sanic from my_blueprint import bp app = Sanic(__name__) app.blueprint(bp) app.run(host='0.0.0.0',port=8000,debug=True) # 2).my_blueprint.py # more my_blueprint.py from sanic import Blueprint from sanic.response import json,text,html ## Jinja2 template #### from jinja2 import Environment,PackageLoader env = Environment(loader=PackageLoader('my_blueprint','templates')) ## database #### import uvloop,peewee from peewee_async import PostgresqlDatabase bp = Blueprint('my_blueprint') # init db connection global database database = PostgresqlDatabase(database='webdb', host='127.0.0.1', user='postgres', password='222221') # router define @bp.route('/') async def bp_root(request): serialized_obj = [] cursor = database.execute_sql('select * from t1;') for row in cursor.fetchall(): serialized_obj.append({ 'id': row[0], 'name': row[1]} ) template = env.get_template('index.html') content=template.render(items=serialized_obj) return html(content) # 3).index.html # more index.html <!doctype html> <title> Sanic </title> <div class=page> <table border="1" cellpadding="10"> <tr> <th>id</th> <th>name</th> </tr> {% for item in items %} <tr> <td> {{ item.id }} </td> <td> {{ item.name }} </td> </tr> {% endfor %} </table> </div> # 5.浏览器运行结果
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