七十八：flask.Restful之flask-Restful标准化返回参数以及准备数据

一、简单示例：

一般情况下返回数据

在restful规范中，要求一旦定义好了返回参数，即使这个参数没有值，也要返回，可以将此参数的值设为None返回

返回模型

二、数据准备：

项目代码

import os
SQLALCHEMY_DATABASE_URI = 'mysql+pymysql://root:[email protected]:3306/test'
SQLALCHEMY_TRACK_MODIFICATIONS = False

SECRET_KEY = os.urandom(30)

from flask_sqlalchemy import SQLAlchemy
db = SQLAlchemy()

from exts import db


class User(db.Model):
    __tablename__ = 'user'
    id = db.Column(db.Integer, primary_key=True)
    username = db.Column(db.String(50))
    email = db.Column(db.String(50))


# 中间表
article_tag_table = db.Table('article_tag',
                             db.Column('article_id', db.Integer, db.ForeignKey('article.id'), primary_key=True),
                             db.Column('tag_id', db.Integer, db.ForeignKey('tag.id'), primary_key=True))


class Article(db.Model):
    __tablename__ = 'article'
    id = db.Column(db.Integer, primary_key=True)
    title = db.Column(db.String(100))
    content = db.Column(db.Text)
    author_id = db.Column(db.Integer, db.ForeignKey('user.id'))
    author = db.relationship('User', backref='article')
    tags = db.relationship('Tag', secondary=article_tag_table, backref='tags')  # 中间表外键


class Tag(db.Model):
    __tablename__ = 'tag'
    id = db.Column(db.Integer, primary_key=True)
    name = db.Column(db.String(50))

from flask import Flask
import config
from exts import db

app = Flask(__name__)
app.config.from_object(config)
db.init_app(app)

if __name__ == '__main__':
    app.run(debug=True)

from flask_script import Manager
from flask_migrate import Migrate, MigrateCommand
from app import app
from exts import db
import models  # 导入所有模型

manager = Manager(app)
Migrate(app, db)
manager.add_command('db', MigrateCommand)

if __name__ == '__main__':
    manager.run()

python manager.py db init 初始化
python manager.py db migrate 生成迁移脚本
python manager.py db upgrade 映射到数据库

添加测试数据

from flask import Flask
import config
from exts import db
from models import User, Article, Tag

app = Flask(__name__)
app.config.from_object(config)
db.init_app(app)


@app.route('/')
def index():
    user = User(username='user1', email='[email protected]')
    article = Article(title='title1', content='content1')
    article.author = user
    tag1 = Tag(name='python')
    tag2 = Tag(name='java')
    article.tags.append(tag1)
    article.tags.append(tag2)
    db.session.add(article)
    db.session.commit()
    return '数据已增加'


if __name__ == '__main__':
    app.run(debug=True)

调接口