java - Issue with bindFromRequest in Play! Framework 2.3 -

i'm trying use automatic binding feature of play, without success. i'm developing in java, on eclipse 4.4 luna.

here form :

<h2>create new user</h2> <form action="@routes.backend.createuser()" method="post">     first name     <input type="text" name="firstname" />     last name     <input type="text" name="lastname" />     e-mail     <input type="email" name="email" />     pin     <input type="number" name="pin" />     status     <input type="text" name="status" />     guest?     <input type="checkbox" name="isguest" />      <input type="submit" value="create user" /> </form> 

here class "users":

@entity public class users extends model {  // database columns @id public int userid;  public string firstname; public string lastname; public string email; public int pin; public string status; public boolean isguest;  } 

and here controller:

public class backend extends controller {    public static result createuser() {     form<users> form = form.form(users.class).bindfromrequest();     if (form.haserrors()) {         // dosomething()     } else {         users u = form.get();         u.save();     }      // testing     // checking content of request     dynamicform requestdata = form.form().bindfromrequest();     string firstname = requestdata.get("firstname");     string lastname = requestdata.get("lastname");     // printing content works, able see correct values     system.out.println(firstname); // bob     system.out.println(lastname); // smith     // somehow doesn't work...     system.out.println(u.firstname); // null     system.out.println(u.lastname); // null     system.out.println(u.userid); // correctly generated     // end of testing      return redirect(routes.backend.allusers());   } } 

i wonder why automatic binding of values doesn't work. have made sure fields name in form correspond attributes names in class, , should enough form binding work, right?

i using eclipse luna, , turned off automatic project build (i manually console). know eclipse can cause issues because of auto-build feature. note: way go, didn't clean project using activator command, user dmitri suggested. also, have once, long don't turn on automatic build feature in eclipse.

i have tried restarting eclipse , application several times, without success...

edit: tried using string attributes users class, since requestdata.get(string s) method returns string. still no success...

edit 2: i'm going bind values manually... if have idea, please post :)

edit 3: i've updated code follow rules mentioned in answer below

edit 4: can't autobinding working when using postgresql 9.3 database. when use in-memory database, works smoothly. also, since there no jdbc driver java 8 , postgresql 9.3, i'm using older version of driver (actually driver on pgsql's website, couldn't working play). have check happens db, i'll report here!

edit 5: tried create custom data binder this:

        formatters.register(user.class, new formatters.simpleformatter<user>() {         @override         public user parse(string arg0, locale arg1) throws parseexception {             user u = new model.finder<integer, user>(integer.class, user.class).byid(integer.parseint(arg0));             return u;         }         @override         public string print(user arg0, locale arg1) {             return "user : " + arg0.firstname;         }     }); 

... didn't work!

edit 6: user dmitri has found working solution: have compile project outside of eclipse. seems there incompatibilities between eclipse's compilator , play! framework's compilator...

i have been struggling same problem: bindfromrequest returned nulls "name" field. did same guy in play java introduction video did: youtube.com/watch?v=blrmnjpqszc . still no luck. i've been working on windows 7 jdk 1.8. ide: eclipse 4.4.0. , run activator through cygwin.

this solved problem me:

1. in eclipse: project -> build automatically - > turn off
2. in cygwin: ./activator clean; ./activator compile; ./activator run;

after this, bindfromrequest binds name correctly , puts database.