Flask - OperationalError：（OperationalError）没有这样的表SqlAlchemy MySQL在执行GET请求时出错

Question

我有两个文件，restmodels.py和routes.py

restmodels.py代码如下

__author__ = 'seroney'

from flask import Flask
from flask_sqlalchemy import SQLAlchemy

app = Flask(__name__)
db = SQLAlchemy(app)

class ProductAttributes(db.Model):
    __tablename__ = 'oc_product_attribute'
    product_id = db.Column(db.Integer,primary_key=True)
    attribute_id = db.Column(db.Integer,primary_key=True)
    language_id = db.Column(db.Integer,primary_key=True)
    text=db.Column(db.String)

和routes.py的代码如下。

from flask import Flask,request,jsonify
from flask_sqlalchemy import SQLAlchemy
import requests

from restmodels import ProductAttributes


app = Flask(__name__)

#manager = flask_restless.APIManager(app)

app.config['SQLALCHEMY_DATABASE_URI'] = 'mysql://root:seroney@localhost/test'

db = SQLAlchemy(app)


@app.route('/api/attributes/',methods=['GET'])
def getProductAttributes():
    if request.method =='GET':
        results = ProductAttributes.query.all()
        json_results = []
        for result in results:
            d = {
                'product_id':result.product_id,
                'attribute_id':result.attribute_id,
                'language_id':result.language_id,
                'text':result.text
            }
            json_results.append(d)

        return jsonify(items = json_results)

@app.route('/api/attributes/', methods=['POST'])

def postProductAttributes():
 #   if request.headers['Content-Type'] == 'application/json':
    product_id = request.get_json('product_id')
    attribute_id = request.get_json('attribute_id')
    language_id = request.get_json('language_id')
    text = request.get_json('text')

    # if product_id is None or attribute_id is None or language_id is None or text is None:
    #     return jsonify({"message": "Error."}), 400
    #new_attrib = Attributes(text=text,product_id=product_id,language_id=language_id,attribute_id=attribute_id)
    print request.json
    dict = request.json
    product_id = dict['product_id']
    attribute_id = dict['attribute_id']

    if ProductAttributes.query.filter_by(attribute_id=product_id,product_id=product_id) is None:
        print ProductAttributes.query.filter_by(attribute_id=attribute_id,product_id = product_id)
        print "Product_id = " +str(product_id)
        print "Attribute_id = "+str(attribute_id)
        return jsonify({"message": "Error product attribute already exists."}), 400
    db.session.add(ProductAttributes(**request.json))
    db.session.commit()
    print requests.Response()
            #return 'ok'
    return jsonify(**request.json),201

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

我正在使用mysql数据库，该表存在于下面的快照中

当我收到请求时，我收到以下错误

OperationalError: (OperationalError) no such table: oc_product_attribute u'SELECT oc_product_attribute.product_id AS oc_product_attribute_product_id, oc_product_attribute.attribute_id AS oc_product_attribute_attribute_id, oc_product_attribute.language_id AS oc_product_attribute_language_id, oc_product_attribute.text AS oc_product_attribute_text \nFROM oc_product_attribute' () // Werkzeug Debugger

但是当我在与routes.py相同的文件中包含restmodels.py代码时，代码可以正常工作，但对于POST请求的上述代码，代码可以正常工作。非常感谢任何帮助