我正在使用flask-restless,并在我的第一个POST(来自邮递员)上收到错误请求(400)错误。如果我继续提出相同的请求,它就会不断出错。但是,如果我删除了 flask-restless 抱怨的字段,再次运行 POST,得到肯定的响应,重新添加相同的字段,然后再次运行,从那时起它就可以正常工作了。
网址:/api/appraisals
请求 JSON:
{
"suggested_price": 88,
"listing": {"id": 1}
}
错误响应:
{
"message": "Model does not have field 'listing'"
}
应用程序.py:
from models.db import init_app
from controllers import api
app = Flask(__name__)
app.config.from_object('config')
init_app(app)
api.init_api(app)
来自models.db.py:
from flask.ext.sqlalchemy import SQLAlchemy
def init_app(app):
with app.app_context():
db.init_app(app)
db.create_all()
db = SQLAlchemy()
来自控制器.api.py:
from flask.ext.restless import APIManager
class ResourceManager(APIManager): ...
def init_api(app):
with app.app_context():
manager = ResourceManager(app, flask_sqlalchemy_db=db)
manager.add_resource(ListingResource())
manager.add_resource(AppraisalResource())
来自models.appraisal.py:
from .db import db
from .base import BaseModel
class Appraisal(BaseModel):
__tablename__ = "appraisal"
# required fields
suggested_price = db.Column(db.Integer, nullable=False)
# optional fields
currency = db.Column(db.Unicode, default=u"USD")
# relationships
listing_id = db.Column(db.Integer, db.ForeignKey('listing.id'))
来自models.listing.py:
from sqlalchemy.schema import UniqueConstraint
from .db import db
from .base import BaseModel
class Listing(StatusfulModel, BaseModel):
__tablename__ = "listing"
# relationships
appraisals = db.relationship(
"Appraisal",
backref=db.backref("listing", uselist=False),
uselist=True)
来自 controllers.resource.appraisal.py:
class AppraisalResource(Resource):
model_class = Appraisal
base_url = "appraisals"
allowed_methods = ["POST", "GET"]
def get_fields(self):
super_fields = super(AppraisalResource, self).get_fields()
return super_fields + [
"listing",
"listing.id"
]