org.postgresql.util.PSQLException：错误：关系“ bug_report_model”不存在

Question

I'm trying to run a simple java play 2.5 app on heroku. I am able to open the home page which generally means that connection to the database is successful. But when ever i try to call the route to add a dummy value to the table it shows

play.api.UnexpectedException: Unexpected exception[PersistenceException: ERROR executing DML bindLog[] error[ERROR: relation "bug_report_model" does not exist\n   Position: 13]]

The code to add a value to the database is

 public Result enterDummyTextInDb() {
    BugReportModel model = new BugReportModel();
    model.save();
    return ok(Json.toJson(model));
}

The Model class is

@Entity
public class BugReportModel extends Model {
@Id
private Long id;
private Long timestamp = System.currentTimeMillis();

public BugReportModel() {
}

public static Finder<Long, BugReportModel> find = new Model.Finder<Long, BugReportModel>(BugReportModel.class);

public static List<BugReportModel> findAll() {
    return BugReportModel.find.orderBy("id").findList();
}


public Long getId() {
    return id;
}

public void setId(Long id) {
    this.id = id;
}

public Long getTimestamp() {
    return timestamp;
}

public void setTimestamp(Long timestamp) {
    this.timestamp = timestamp;
}

}

found something for spring/hibernate that said that the table isnt created and so we have to add

spring.jpa.hibernate.ddl-auto=create 

but not sure about it for java play 2.5

Answer 1

You need to configure your app to run evolutions by making your Procfile like this:

web: target/universal/stage/bin/myapp -Dhttp.port=${PORT} -Dplay.evolutions.db.default.autoApply=true -Ddb.default.driver=org.postgresql.Driver -Ddb.default.url=${DATABASE_URL}

For more info see https://www.playframework.com/documentation/2.5.x/ProductionHeroku