CODEWITHSUNDEEP
javadictionaryplayframework-2.0
doniyor
doniyor

Reputation: 37904

how to render Map<String, String> to template and use there

i am trying to render a key,value Map to a template and then show there in this way: 

@(twittsIfollow: Map[String, String])
 .....
 @if(twittsIfollow != null) {
  @for((key, value) <- twittsIfollow) {
    @key
    @value
   } 
 }

it says, it is wrong. is there a scala tag for Map keys values?

here is my method: 

public static Map<String, String> alltwitts(List<Long> otherIDs) {
    Map<String, String> results=new HashMap<String, String>();
    for (Long id: otherIDs) {
        Query selected_twitt = JPA.em().createQuery("select u.twitt from Twitt u where " + " u.whose = ?").setParameter(1, id);
        String twOwner = User.getOneUser(id);
        String twitt  = (String) selected_twitt.getSingleResult();
        results.put(twOwner, twitt);
    }

    return results;
}

then i render to template in this place: 

Map<String, String> twittsIfollow = Twitt.alltwitts(IDusersIamFollowing);
return ok(microblog.render(twittsIfollow));

now it is saying: [NonUniqueResultException: result returns more than one elements]

thanks

Upvotes: 2

Views: 3914

Answers (3)

doniyor
doniyor

Reputation: 37904

how i solved: 

    public static Map<String, List<String>> alltwitts(List<Long> otherIDs) { 
    Map<String, List<String>> results=new HashMap<String, List<String>>();
    for (Long id: otherIDs) {                       
        Query selected_twitt = JPA.em().createQuery("select twitt from Twitt where " + " whose = ? order by id").setParameter(1, id);
        String twOwner = User.getOneUser(id);
        List<String> twitt  = selected_twitt.getResultList();
        results.put(twOwner, twitt);

    }
    System.out.println(results);
    return results;
}

then in my Application: 

Map<String, List<String>> twittsIfollow = Twitt.alltwitts(IDusersIamFollowing);
return ok(microblog.render(twittsIfollow));

then in my template: 

@(twittsIfollow: Map[String, List[String]])

and 

@if(twittsIfollow != null) {
  @for((key, value) <- twittsIfollow) {
  @for(innervalue <- value){
            Username: @key
            Twitt: @innervalue
        } 
      } 
 }

just for those who are dumb like me :D and looking for solution like this..

thanks for help,guys..

Upvotes: 3

gre
gre

Reputation: 1841

Simply

@for((key, value) <- twittsIfollow) {
  @key
  @value
}

BTW, if you are using Scala, twittsIfollow should never be null. Prefer using Option.

Upvotes: 9

biesior
biesior

Reputation: 55798

@doniyor, I'm surpriesed as I showed you the way in other question not so long ago.

By the way I think it will be better to build, pass and iterate twittsIfollow as a List of Maps

then you can use 

@if(twittsIfollow != null) {
  @for(twitts <- twittsIfollow) {
   the value is:  @twitts.get("key")
  } 
}

Upvotes: 1

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