google-app-engine

问题 I have three records in a table example: *Usernames* *email* *city* Nick nick@example.com London Vikky vicky@example.com Paris Lisa lisa@example.com Sydney Now I want to get specific record keeping email ID as a key , SQL query may be like this select * from table1 where email = "vicky@example.com" What is the equivalent GQL query for the above ?? 回答1: SELECT * FROM table1 WHERE email = 'vicky@example.com' should work fine in GQL. See here for more information http://code.google.com/appengine

问题 i have declared an entity the following way: public class MyEntity { @PrimaryKey @Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY) private Long id; @Persistent private String text; //getters and setters } Now I want to retrieve the objects using the id. I tried to manage it from the Google Appengine Data Viewer with "SELECT * FROM MyEntity Where id = 382005" or via a query in a servlet. I get no results returned. But i know for sure that the object with the id exists (i made a jsp

问题 i have declared an entity the following way: public class MyEntity { @PrimaryKey @Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY) private Long id; @Persistent private String text; //getters and setters } Now I want to retrieve the objects using the id. I tried to manage it from the Google Appengine Data Viewer with "SELECT * FROM MyEntity Where id = 382005" or via a query in a servlet. I get no results returned. But i know for sure that the object with the id exists (i made a jsp

问题 I'm trying to build an app in Python with Google App Engine that fetches followers of specific accounts and then their tweets. I'm basing it on this template and changing it to adapt it to what I need. The issue at the moment is that when I try to fetch followers, I get an DeadlineExceededError due to the Twitter API waiting time. I have found this post on how to fix the same problem and I think that in my case the best solution would be to use backends, but I noticed that they are deprecated

问题 Working in Eclipse, & using the provided methods in Firebase' docs, I was able to setup logins for several providers such as Google and Facebook, using the redirect option. I basically click on a button for the provider on my web page, & it takes me to the login screen where I can enter a UID and password (e.g. Google sign-in) However, once I authenticate properly with a valid account, and even if I sign-out, I get logged into the same account, without ever getting the screen prompting to log

问题 Since upgrading from Ubuntu 14.04 to 16.04 I get the following error on the local development server: ERROR 2016-06-19 14:03:10,294 wsgi.py:263] Traceback (most recent call last): File "/home/mort/google_appengine/google/appengine/runtime/wsgi.py", line 240, in Handle handler = _config_handle.add_wsgi_middleware(self._LoadHandler()) File "/home/mort/google_appengine/google/appengine/runtime/wsgi.py", line 299, in _LoadHandler handler, path, err = LoadObject(self._handler) File "/home/mort

问题 Since upgrading from Ubuntu 14.04 to 16.04 I get the following error on the local development server: ERROR 2016-06-19 14:03:10,294 wsgi.py:263] Traceback (most recent call last): File "/home/mort/google_appengine/google/appengine/runtime/wsgi.py", line 240, in Handle handler = _config_handle.add_wsgi_middleware(self._LoadHandler()) File "/home/mort/google_appengine/google/appengine/runtime/wsgi.py", line 299, in _LoadHandler handler, path, err = LoadObject(self._handler) File "/home/mort

问题 Google just came out with JDO 3.0 (which uses DataNucleus 2.0) for Google App Engine, and I want to use it, since it conveniently supports unowned relationships. I've been trying for days, but I can't figure out how to use it with the Google Eclipse plugin. I've found this web page https://developers.google.com/appengine/docs/java/datastore/jdo/overview-dn2, but my project folder doesn't have a build.xml file. I tried creating a separate project and transferring all my code, but the new

问题 Google just came out with JDO 3.0 (which uses DataNucleus 2.0) for Google App Engine, and I want to use it, since it conveniently supports unowned relationships. I've been trying for days, but I can't figure out how to use it with the Google Eclipse plugin. I've found this web page https://developers.google.com/appengine/docs/java/datastore/jdo/overview-dn2, but my project folder doesn't have a build.xml file. I tried creating a separate project and transferring all my code, but the new

问题 I am trying to solve the racing problem based on this to prevent duplicate user registrations. So if the account exists or the email has been used, no entity will be created. @ndb.transactional def get_or_insert2(account, email): accountExists, emailExists = False, False entity = Member.get_by_id(account) if entity is not None: accountExists = True if Member.query(Member.email==email).fetch(1): emailExists = True if not accountExists and not emailExists: entity = Member(id=account) entity.put