[英]GAE Python TypeError on datastore filter query
我將這樣的實體保存在一個RequestHandler中,並且可以通過SDK控制台進行驗證:
class Moment(db.Model):
user = db.IntegerProperty()
index = db.IntegerProperty()
編輯:我以前只包括部分類定義,並且沒有顯示我是如何編寫模型的。 以下是完整的示例:
class Moment(db.Model):
user = db.IntegerProperty()
index = db.IntegerProperty()
date = db.DateTimeProperty()
qx = db.FloatProperty()
qy = db.FloatProperty()
qz = db.FloatProperty()
qw = db.FloatProperty()
latitude = db.FloatProperty()
longitude = db.FloatProperty()
image = db.BlobProperty()
def __init__(self, obj):
super(Moment,self).__init__()
self.user = obj['user']
self.index = obj['index']
self.date = obj['date']
self.qx = obj['qx']
self.qy = obj['qy']
self.qz = obj['qz']
self.qw = obj['qw']
self.latitude = obj['latitude']
self.longitude = obj['longitude']
self.image = obj['image']
class UploadHandler(webapp2.RequestHandler):
def post(self):
obj = biplist.readPlistFromString(self.request.body)
Moment(obj).put()
當我嘗試過濾時得到...
class ServeHandler(webapp2.RequestHandler):
def get(self):
params = {}
params['user'] = int(self.request.get('user'))
params['index'] = int(self.request.get('index'))
q = Moment.all()
q.filter("user =", params['user'])
q.filter("index =", params['index'])
print q.get()
我得到以下內容:
ERROR 2012-11-04 06:56:04,846 webapp2.py:1553] __init__() got an unexpected keyword argument 'index'
Traceback (most recent call last):
File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/webapp2/webapp2.py", line 1536, in __call__
rv = self.handle_exception(request, response, e)
File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/webapp2/webapp2.py", line 1530, in __call__
rv = self.router.dispatch(request, response)
File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/webapp2/webapp2.py", line 1278, in default_dispatcher
return route.handler_adapter(request, response)
File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/webapp2/webapp2.py", line 1102, in __call__
return handler.dispatch()
File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/webapp2/webapp2.py", line 572, in dispatch
return self.handle_exception(e, self.app.debug)
File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/webapp2/webapp2.py", line 570, in dispatch
return method(*args, **kwargs)
File "<path>/main.py", line 51, in get
print q.get()
File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/ext/db/__init__.py", line 2102, in get
return results.next()
File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/ext/db/__init__.py", line 2314, in next
return self.__model_class.from_entity(self.__iterator.next())
File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/ext/db/__init__.py", line 1442, in from_entity
return cls(None, _from_entity=entity, **entity_values)
TypeError: __init__() got an unexpected keyword argument 'index'
INFO 2012-11-04 06:56:04,849 dev_appserver.py:3092] "GET /serve?user=0&index=0 HTTP/1.1" 500 -
但是,如果我print q.count()
而不是print q.get()
我將得到1。似乎根據文檔,我正在正確地進行操作,並且我嘗試了類似的問題(但無濟於事)的建議。
SDK v1.7.3
受到對我的問題的評論以及一些錯誤的想法的啟發,並發現了其他類似的問題/答案,我重新評估了處理Model類的方式。 事實證明,至少我重寫類構造函數的方式,我相信我在超類處理初始化的方式方面有所突破。 以下對我來說現在可以正常工作:
class Moment(db.Model):
user = db.IntegerProperty()
index = db.IntegerProperty()
date = db.DateTimeProperty()
qx = db.FloatProperty()
qy = db.FloatProperty()
qz = db.FloatProperty()
qw = db.FloatProperty()
latitude = db.FloatProperty()
longitude = db.FloatProperty()
image = db.BlobProperty()
class UploadHandler(webapp2.RequestHandler):
def post(self):
obj = biplist.readPlistFromString(self.request.body)
Moment(user = obj['user'],
index = obj['index'],
date = obj['date'],
qx = obj['qx'],
qy = obj['qy'],
qz = obj['qz'],
qw = obj['qw'],
latitude = obj['latitude'],
longitude = obj['longitude'],
image = obj['image']).put()
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