在Flask-SQLAlchemy教程中,定义了User模型的构造函数:
from flask import Flask from flask.ext.sqlalchemy import SQLAlchemy app = Flask(__name__) app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:////tmp/test.db' db = SQLAlchemy(app) class User(db.Model): id = db.Column(db.Integer, primary_key=True) username = db.Column(db.String(80), unique=True) email = db.Column(db.String(120), unique=True) def __init__(self, username, email): self.username = username self.email = email
对于有两列的表,这可能是可以接受的,但如果我有10列以上的表怎么办?每次定义新模型时都必须定义构造函数吗?