flask中使用SQLAlchemy进行辅助开发

sudo apt-get install Flask-SQLAlchemy

# 安装后可直接在py中使用
import flask
from flask.ext.sqlalchemy import SQLAlchemy
 
app = flask.Flask(__name__)
# - Settings里配置了SqlAlchemy的数据库地址
# sqlite ex: "sqlite:///dbname.db"
app.config.from_object("Settings")
db = SQLAlchemy(app)
db.init_app(app)
# - create_all() 调用时将会创建所有继承db.Model的模版
# Model ex: 见 Class AdminInfo
db.create_all()
 
class AdminInfo(db.Model):
  id = db.Column(db.Integer, primary_key = True)
  name = db.Column(db.String(16))
  password = db.Column(db.String(32))
  kidname = db.Column(db.String(16))
  diy_show = db.Column(db.Text)
 
  def __init__(self, name, password, kidname, diy_show):
    self.name = name
    self.password = password
    self.kidname = kidname
    self.diy_show = diy_show
 
  def __repr__(self):
    return "<name: %s  pw: %s>"%(self.name, '*'*len(self.password))

# 对AdminInfo进行操作
ai = AdminInfo("gaoyiping", "gaoyiping", u"我叫高一平", u"大家好，我叫高一平，你叫什么？我们交个朋友啊。")
# 这样就已经实例了一个SQL Data
# 对db进行插入
db.session.add(ai)
# 对db commit
db.session.commit()
 
# 如果进行查询
AdminInfo.query.all()
# >>> [<name: gaoyiping  pw: *********>, ]
AdminInfo.query.get(1) # 查询刚插入的第一条记录
# >>> <name: gaoyiping  pw: *********>
AdminInfo.query.filter_by(name = "gaoyiping")
# >>> <name: gaoyiping  pw: *********>