问题
On Heroku using Play V2. Everything works fine when tested locally, but then when I deploy to Heroku and attempt to save to a PostgreSQL database I get the following error.
In my Procfile I have this.
web: target/start -Dhttp.port=${PORT} -DapplyEvolutions.default=true -Ddb.default.url=${DATABASE_URL} -Ddb.default.driver=org.postgresql.Driver
Here are my Heroku Error Logs:
2012-04-03T18:16:05+00:00 app[web.1]: play.core.ActionInvoker$$anonfun$receive$1$$anon$1: Execution exception [[PersistenceException: Error getting sequence nextval]]
2012-04-03T18:16:05+00:00 app[web.1]: ! @6a0gdoh95 - Internal server error, for request [POST /users] ->
2012-04-03T18:16:05+00:00 app[web.1]: at play.core.ActionInvoker$$anonfun$receive$1.a
2012-04-03T18:16:05+00:00 app[web.1]: [error] application -
2012-04-03T18:16:05+00:00 app[web.1]:
2012-04-03T18:16:05+00:00 app[web.1]:
2012-04-03T18:16:05+00:00 app[web.1]: at play.core.ActionInvoker$$anonfun$receive$1.apply(Invoker.scala:63) [play_2.9.1-2.0.jar:2.0]
2012-04-03T18:16:05+00:00 app[web.1]: at play.core.ActionInvoker.apply(Invoker.scala:61) [play_2.9.1-2.0.jar:2.0]
2012-04-03T18:16:05+00:00 app[web.1]: at com.avaje.ebean.config.dbplatform.SequenceIdGenerator.loadMoreIds(SequenceIdGenerator.java:163) ~[ebean-2.7.3.jar:na]
2012-04-03T18:16:05+00:00 app[web.1]: at com.avaje.ebeaninternal.server.deploy.BeanDescriptor.nextId(BeanDescriptor.java:1218) ~[ebean-2.7.3.jar:na]
2012-04-03T18:16:05+00:00 app[web.1]: at com.avaje.ebean.config.dbplatform.SequenceIdGenerator.getMoreIds(SequenceIdGenerator.java:213) ~[ebean-2.7.3.jar:na]
2012-04-03T18:16:05+00:00 app[web.1]: at akka.actor.ActorCell.invoke(ActorCell.scala:617) [akka-actor-2.0.jar:2.0]
2012-04-03T18:16:05+00:00 app[web.1]: at com.avaje.ebeaninternal.server.persist.DefaultPersister.setIdGenValue(DefaultPersister.java:1304) ~[ebean-2.7.3.jar:na]
2012-04-03T18:16:05+00:00 app[web.1]: at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:179) [akka-actor-2.0.jar:2.0]
2012-04-03T18:16:05+00:00 app[web.1]: at akka.actor.Actor$class.apply(Actor.scala:290) [akka-actor-2.0.jar:2.0]
2012-04-03T18:16:05+00:00 app[web.1]: at com.avaje.ebean.config.dbplatform.SequenceIdGenerator.nextId(SequenceIdGenerator.java:118) ~[ebean-2.7.3.jar:na]
2012-04-03T18:16:05+00:00 app[web.1]: Caused by: javax.persistence.PersistenceException: Error getting sequence nextval
2012-04-03T18:16:05+00:00 app[web.1]: at com.avaje.ebeaninternal.server.persist.DefaultPersister.insert(DefaultPersister.java:403) ~[ebean-2.7.3.jar:na]
2012-04-03T18:16:05+00:00 app[web.1]: at org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:1810) ~[postgresql-8.4-702.jdbc4.jar:na]
2012-04-03T18:16:05+00:00 app[web.1]: at org.postgresql.jdbc2.AbstractJdbc2Statement.executeQuery(AbstractJdbc2Statement.java:271) ~[postgresql-8.4-702.jdbc4.jar:na]
2012-04-03T18:16:05+00:00 app[web.1]: at org.postgresql.core.v3.QueryExecutorImpl.receiveErrorResponse(QueryExecutorImpl.java:2077) ~[postgresql-8.4-702.jdbc4.jar:na]
2012-04-03T18:16:05+00:00 app[web.1]: at org.postgresql.jdbc2.AbstractJdbc2Statement.executeWithFlags(AbstractJdbc2Statement.java:386) ~[postgresql-8.4-702.jdbc4.jar:na]
2012-04-03T18:16:05+00:00 app[web.1]: Caused by: org.postgresql.util.PSQLException: ERROR: relation "user_seq" does not exist
2012-04-03T18:16:05+00:00 app[web.1]: at org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:257) ~[postgresql-8.4-702.jdbc4.jar:na]
2012-04-03T18:16:05+00:00 app[web.1]: at org.postgresql.jdbc2.AbstractJdbc2Statement.execute(AbstractJdbc2Statement.java:498) ~[postgresql-8.4-702.jdbc4.jar:na]
回答1:
2012-04-03T18:16:05+00:00 app[web.1]: Caused by: org.postgresql.util.PSQLException: ERROR: relation "user_seq" does not exist
Seems to indicate that your database is missing some tables. Make sure that your schema is correct. You can get a console to your DB using heroku pg:psql.
A good practice is setting up postgres locally from scratch and make sure that all of the steps to do so are automated by your application or scripts so that it is more difficult to forget things like this.
来源：https://stackoverflow.com/questions/9999107/heroku-app-play-working-fine-locally-then-not-saving-to-database-on-server