playframework

问题 I am getting these error ProvisionException: Unable to provision, see the following errors: com.google.inject.ProvisionException: Unable to provision, see the following errors: 1) Could not find a suitable constructor in models.factory.FactoryHandler. Classes must have either one (and only one) constructor annotated with @Inject or a zero-argument constructor that is not private. at models.factory.FactoryHandler.class(FactoryHandler.scala:7) while locating models.factory.FactoryHandler for

问题 I am trying to store the RUNNING_PID file at /var/run instead of root directory. Tried all the options suggested at: Another SO question about the subject and the solution play suggest in their documnetation: Play additional configuration Yet when I start my app the RUNNING_PID file is created in root directory and the /var/run/play.pid remains empty 回答1: Put play.server.pidfile.path=/var/run/RUNNING_PID in your application.conf 来源： https://stackoverflow.com/questions/35149196/play-change

问题 We have just upgraded from Play framework 2.4.3 to 2.5.0 (java). However, after upgrading, our tests start getting timeout after a couple of minutes. Before the upgrade they ran for an hour without errors. It looks like some threads are getting blocked, and the system simply stops responding. I am running a smaller version of the load test locally on my machine, with Yourkit java profiler. Initially, there are 16 netty-event-loop threads started. After about a minute, I can see that they have

问题 Here is the layout of my multi-project Play 2.2 application - I'm still trying to convert to build.sbt: myApp + app + build.sbt + conf | + routes + project | + build.properties | + Build.scala | + plugin.sbt + modules + myModule + app + build.sbt + conf + routes myApp/build.sbt: name := "myApp" version := "1.0-SNAPSHOT" organization := "com.mydomain" lazy val myModule = project.in(file("modules/myModule")) lazy val main = project.in(file(".")).dependsOn(myModule).aggregate(myModule) play

问题 Here is the layout of my multi-project Play 2.2 application - I'm still trying to convert to build.sbt: myApp + app + build.sbt + conf | + routes + project | + build.properties | + Build.scala | + plugin.sbt + modules + myModule + app + build.sbt + conf + routes myApp/build.sbt: name := "myApp" version := "1.0-SNAPSHOT" organization := "com.mydomain" lazy val myModule = project.in(file("modules/myModule")) lazy val main = project.in(file(".")).dependsOn(myModule).aggregate(myModule) play

问题 I have a Play! 2.0.2 application that needs to store some files in the database. we are using Ebean for our ORM. I believe I need a BYTEA column in my database to store the file, but I'm not sure what data type to use in my model. Should I be using some kind of Blob ? Or just a byte[] ? Or is there another data type I should be using? Thanks! 回答1: To create blob with Ebean you need to use byte array with @Lob annotation @Lob public byte[] image; You'll need to convert between File <-> byte

问题 I'm using Scala / Mongo / Casbah / Salat / Play2 and when i try to use Salat it seems it has a dependency to Scalap. It works fine when running the application with play run but with play start i get the following stack: [info] application - Can't create user java.lang.NoClassDefFoundError: scala/tools/nsc/util/ClassPath$JavaContext at scala.tools.scalap.scalax.rules.scalasig.ScalaSigParser$.scalaSigFromAttribute(ScalaSig.scala:35) ~[scalap-2.9.1.jar:na] at scala.tools.scalap.scalax.rules

问题 The play framework has a function in the view to create an SEO friendly URL via the slugify() function. There does not seem to be an "unslugify" function, so how do you lookup models from the slugified parameter? If for instance I have a Blog model which has a title property set to "hello world", slugify would produce "hello-world". If I then perform a query Blog.find("byTitle", title) where title is the slugified title, it will return no results. How can you lookup a model using the provided

问题 I have the problem writing query in SLICK Here is my request to MySql database: SELECT * FROM readings AS r JOIN parameters AS p LEFT JOIN sensorvalues AS sv ON sv.parameter_id=p.id AND sv.reading_id=r.id How can I write it using SLICK ? It is really lack of info on joins in docs. UPDATE 1 I tried all the combinations even one like this val q = for{ Join(p,sv) <- Parameters leftJoin SensorValues on (_.id is sv.parameter_id) r <- Readings if sv.reading_id is r.id } yield(r,p,sv) In this case

问题 In the Play 2.3.x documentation on Evolutions it says In development mode however it is often simpler to simply trash your development database and reapply all evolutions from the beginning. However it doesn't give instructions on how to do this. Is there some kind of activator command I can use to do this? How can I reset and reapply evolutions? Thanks! Update: I would prefer not to have to mess with my DB manually, but it seems like that's the only way 回答1: If you don't care about the data