objectify

问题 MyApi was perfectly fine before. I added Objectify to the dependencies, along with some endpoints, and all of a sudden it says that MyApi isn't a thing! Here's where I call it: import android.content.Context; import android.os.AsyncTask; import android.util.Pair; import android.widget.Toast; import com.google.api.client.extensions.android.http.AndroidHttp; import com.google.api.client.extensions.android.json.AndroidJsonFactory; import com.google.api.client.googleapis.services

问题 On an App Engine application, deployed on standard environment with java 8 activated, I get the exception below if I use both Objectify 6.0 AND the tag <url-stream-handler>urlfetch</url-stream-handler> in the appengine-web.xml file. com.google.cloud.datastore.DatastoreException: Request is missing required authentication credential. Expected OAuth 2 access token, login cookie or other valid authentication credential. See https://developers.google.com/identity/sign-in/web/devconsole-project.

问题 On an App Engine application, deployed on standard environment with java 8 activated, I get the exception below if I use both Objectify 6.0 AND the tag <url-stream-handler>urlfetch</url-stream-handler> in the appengine-web.xml file. com.google.cloud.datastore.DatastoreException: Request is missing required authentication credential. Expected OAuth 2 access token, login cookie or other valid authentication credential. See https://developers.google.com/identity/sign-in/web/devconsole-project.

问题 Say I have these classes: @Entity class MyEntity { @Id String id; @Index Ref<?> ref; } @Entity class Kind2 { ... } Can I query for all MyEntitiy objects where ref refers to any instance of Kind2 ? If so, how? 回答1: Moshe's answer is really the right one. However, you can technically hack something that works by performing inequality queries on the key. Ie, >= KEY('Kind2', 0) and <= KEY('Kind2', MAX_LONG) . This gets significantly more complicated if your entities have parents. I wouldn't

问题 I am unable to get my saved entity reliably using Objectify. It looks like the cache is getting corrupted. The strange thing is - I can see the saved entity correctly though admin console datastore viewer. Also I wrote a small program to view the entity using RemoteApi and I can see the saved value correctly. When I query the entity successively using a servlet or a cloud endpoint rest api - my successive queries are giving different results, and it looks like something in the datastore/cache

问题 In the appengine Billing and Budgeting Resources page, it says that the cost of a "Query" maps to "1 read + 1 small per entity retrieved", whereas a "Query (keys only)" maps to "1 read + 1 small per key retrieved". This seems like a typo to me. It would seem that a Query would still need to perform a full "get" operation on each entity returned. Is this assumption incorrect? I would have expected the cost of a "Query" to be "1 read + 1 read per entity retrieved". 回答1: This definitely looks

问题 I created a very simple Objectify/Endpoints class. import static mypackage.OfyService.ofy; import com.google.api.server.spi.config.Api; import com.google.api.server.spi.config.ApiMethod; import com.googlecode.objectify.Work; @Api(name = "testapi", version = "1") public class TestEndpoint { @ApiMethod(name = "test.insert") public TestEntity insert(final TestEntity test) { test.setName("test"); return ofy().transact(new Work<TestEntity>() { public TestEntity run() { ofy().save().entities(test)

问题 With Google App Engine using Objectify to query the datastore, I would like to use a query like objectifyService.query(Entity.class).filter("name contains", a); which would return a list with all the entities containing the 'a' caracter in their names. However the contains operator doesn't exist. Is there a simple way to do that? 回答1: You can work up a simplified equivalent of the fulltext search service by breaking down your name field into the pieces you wish to search by and storing them

问题 I am trying to retrieve a sorted list of the players scores from a datastore Entity of type"User" After executing: List<User> entities = ofy().load().type(User.class).order("-score").list(); Knowing that I indexed the "score" attribute. Here is the "User.class" @Id String userName; String password; @Index int score; The entities seem to be null and i can't get the entities details.What am I missing??? I am still working on that I managed to modify the method to: @Override public User display(

问题 I am trying to perform a projection query in order to fetch several properties from each entity in my datastore of over ten thousand entities. I have read and followed the documentation, but my query is not returning any results. I've even simplified my projection down to only projecting a single property, the entity's ID field, but still get 0 results. Here is my simplified code: Query q = new Query("MyEntity"); q.addProjection(new PropertyProjection("entityId", Long.class));