对于我的Web应用程序,我想自动生成REST API。我阅读了flask_restless文档,尝试了一些教程,并按所述完成了所有操作:
我的路线将位于app.main.api.pv_tool.py模块中
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'
在models.py中定义大学的位置
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
...
与现有的和充满数据库的连接是建立在database.py:
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,在浏览器中或使用requests
库模块,我在http:// localhost:5000上收到“ asdf”响应。
但是,我无法尝试以下方法访问大学数据:localhost:5000 / unis,localhost:5000 / api / unis等。我总是收到404回应。
没有任何错误,这个问题很难解决。有人知道我该如何调试吗,代码中的错误可能是什么?
在PyCharm Debugger中,管理器对象似乎需要创建一些API:但是我不知道接下来要在这里查找什么。
另外,当我尝试在pv_tool.py中使用create_api_blueprints时,在运行时出现错误:
...
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'
这是我运行应用程序的方式:
运行
from app import app
app.run(debug=True, host='0.0.0.0', port=5000)
应用模块的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)
从终端启动:
rich@local:~ $ python run.py
我设法通过改用flask_sqlalchemy而不是纯sqlalchemy使其工作。
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