使用sqlalchemy的python flask_restless不生成api端点,并使用蓝图

时间:2018-03-02 10:11:34

标签: python flask sqlalchemy flask-restless

对于我的webapp我想自动生成REST API。我阅读了flask_restless docs,尝试了几个教程并完成了所描述的所有内容:

我的路线位于模块 app.main.api.pv_tool.py

from . import api
from app.__init__ import db, app
from app.models import University
import flask_restless

manager = flask_restless.APIManager(app, session=db.scoped_session)
manager.create_api(University, methods=['GET'])

@api.route('/')
def index():
    return 'asdf'

大学在 models.py

中定义
from sqlalchemy import String, Integer
from sqlalchemy.ext.declarative import declarative_base

Base = declarative_base()

...

class University(Base):
    __tablename__ = 'unis'
    id = Column(Integer, primary_key=True, autoincrement=True)
    name = Column(String(64), nullable=False, unique=True)

    def __repr__(self):
        return '<Uni %r>' % self.name

...

并且在 database.py 中建立了与现有数据库和已填充数据库的连接:

from sqlalchemy import create_engine
from sqlalchemy.orm import sessionmaker, scoped_session

from app.models import Base


class Database:
    path = 'sqlite:///pv_tool.sqlite'
    engine = None
    session = None
    scoped_session = None

    def __init__(self, path=path):
        self.engine = create_engine(path, convert_unicode=True)
        Base.metadata.bind = self.engine

        db_session = sessionmaker(bind=self.engine, autocommit=False)
        db_session.bind = self.engine
        self.session = db_session()
        self.scoped_session = scoped_session(self.session)
        Base.metadata.create_all()

现在在我的浏览器中或使用requests库模块,我在http://localhost:5000上收到'asdf'回复。

但是,我无法通过以下所有方式访问我的大学数据:localhost:5000 / unis,localhost:5000 / api / unis等等。我总是收到404回复。

没有任何错误,这个问题很难实现。有没有人知道我如何调试这一般以及代码中的错误是什么?

在PyCharm Debugger中,manager对象似乎有一些API要创建: PyCharm 但我不知道接下来我能找到什么。

另外,当我尝试在pv_tool.py中使用create_api_blueprints时,我在运行时遇到错误:

...
manager = flask_restless.APIManager(app, session=db.scoped_session)
api_bp = manager.create_api_blueprint('unis', University, methods=['GET'])
app.register_blueprint(api_bp)
...


Traceback (most recent call last):   File "run.py", line 5, in <module>
    from app import app   File "/Users/rich/code/src/github.com/pv-tool-backend/app/__init__.py", line 4, in <module>
    from app.main.api import api   File "/Users/rich/code/src/github.com/pv-tool-backend/app/main/api/__init__.py", line 5, in <module>
    from . import pv_tool   File "/Users/rich/code/src/github.com/pv-tool-backend/app/main/api/pv_tool.py", line 11, in <module>
    api_bp = manager.create_api_blueprint('unis', University, methods=['GET'])   File "/Users/rich/code/src/github.com/pv-tool-backend/pv_tool_backend_venv/lib/python3.6/site-packages/flask_restless/manager.py", line 549, in create_api_blueprint
    restlessinfo = app.extensions['restless'] AttributeError: type object 'University' has no attribute 'extensions'

这就是我运行应用程序的方式:

run.py

from app import app
app.run(debug=True, host='0.0.0.0', port=5000)

app模块的 init.py

from flask import Flask
from flask_cors import CORS
from app.main.api import api
from app.database import Database


db = Database()

app = Flask(__name__)
app.register_blueprint(api)

CORS(app)

从终端开始:

rich@local:~ $ python run.py
  • http://0.0.0.0:5000/上运行(按CTRL + C退出)
  • 使用stat
  • 重新启动
  • 调试器处于活动状态!
  • 调试器密码:122-170-707

1 个答案:

答案 0 :(得分:1)

我设法通过使用flask_sqlalchemy而不是纯sqlalchemy使其工作。