Populating Drop down with the values from database in play frame work

Question

I am new to play frame work and i am finding it bit difficult. i am retrieving list of client names from data base and populating it to a dropdown ,here is my client.java c

Answer 1

Play framework provides template helper library which gives functionality to build select dropdown with options and selected value. It's pretty simple to use once understood properly.

@helper.select() method in view takes various parameters related to a input field of select type. 1st parameter is form field, since here we don't have any form we can create a temporary form and create a new field inside with name Consultant[as this will the value of name attribute of select field]. 2nd parameter will be map of options in which key and value, corresponds to value of option tag and text enclosed in option tag respectively.

Controller code

package controllers;

import models.Client;

import play.mvc.*;
import views.html.*;

public class Application extends Controller {


    public static Result index(){

        return ok(index.render(Client.getClientDetails()));
    }

}

Model Code

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.*;

import play.db.ebean.Model;
public class Client extends Model {

    /**
     * 
     */
    private static final long serialVersionUID = -1932214701504374792L;
    public static String ClientName;
    public static HashMap<String, String> Clientdetail= new HashMap<String, String>();
    public static HashMap<String, String> getClientDetails() {
        try {
            Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver").newInstance();
            Connection conn = DriverManager.getConnection("jdbc:sqlserver://localhost:1433","SUMEET","sumeet");
            Statement sta = conn.createStatement();
            String Sql = "select * from client";
            ResultSet rs = sta.executeQuery(Sql);
            while (rs.next()) {
                ClientName = rs.getString("ClientName");
                Clientdetail.put(ClientName,ClientName);
               }

        } catch (InstantiationException | IllegalAccessException
                | ClassNotFoundException |SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return(Clientdetail);

    }

}

View Code : index.scala.html

@(ClientDetails: java.util.HashMap[String, String])

@import helper._

@main("ADMS") {

   <center>
    <form id="select">
   <a>CONSULTANT</a>
   @select(Form.form()("Consultant"),           
       options(ClientDetails),
       'value -> "clientName1"[any value that should be selected by default])
     <table border="1">
       <tr>
       <td width=50px>Client</td>
       <td width=50px>Project</td>
       <td width=50px>Task</td>
       <td width=50px>Date</td>
       <td width=50px>Consultant</td>
       <td width=50px>Role</td>
       <td width=80px>Is Billable</td>
       </tr>
       <tr>
       <td>@ClientDetails</td>
       </tr>
       </table>
      </form>
   </center>
}

Answer 2

Yeah, unfortunately Play's templates system is Scala based so you'll have to map over the your @ClientDetails:

@ClientDetails.map { clientName =>
  <option>@clientName</option>
}

If you return more complex objects it could look more like this:

@ClientDetails.map { client =>
  <option value="@client.id">@client.name</option>
}

I hope this helps!