[2.2] : Porting Yabe 1.x tutorial to 2.2: ManyToMany query

[Marc Haubenstock]

I am trying to implement the yabe tutorial from play 1.0 in play 2.0

Currently I am stuck at the tagging functionality: http://www.playframework.com/documentation/1.2.3/guide6

Essentially the problem is this:

I have a Post class, each Post object can have multiple number of tags associated with that class:

    @ManyToMany(cascade=CascadeType.PERSIST)
    public Set<Tag> tags;

I want to write a function which, given an array of tags, will return a list of Posts, if and only if all tags are present in the Post objects.

The unit tests are as follows:

        @Test
    public void testTags() {
        // Create a new user and save it
        SuperUser.setInstance("b...@gmail.com", "secret", "Bob").save();


        SuperUser bob = SuperUser.getInstance();


        // Create a new post
        Post bobPost = new Post(bob, "Hello world","My first post");
        bobPost.save();


        Post anotherBobPost = new Post(bob, "Hello world", "Hop");
        anotherBobPost.save();


        // Well
        assertEquals(0, Post.findTaggedWith("Red").size());


        // Tag it now
        bobPost.tagItWith("Red").tagItWith("Blue").save();
        anotherBobPost.tagItWith("Red").tagItWith("Green").save();


        // Check
        assertEquals(2, Post.findTaggedWith("Red").size());
        assertEquals(1, Post.findTaggedWith("Blue").size());
        assertEquals(1, Post.findTaggedWith("Green").size());


        // Checks for multiple tag params
        assertEquals(1, Post.findTaggedWith("Red", "Blue").size()); //Fail -  Actual: 0
        assertEquals(1, Post.findTaggedWith("Red", "Green").size());
        assertEquals(0, Post.findTaggedWith("Red", "Green", "Blue").size());
        assertEquals(0, Post.findTaggedWith("Green", "Blue").size());


        SuperUser.removeSuperUser();


    }

My current implementation is as follows:

        public static List<Post> findTaggedWith(String... tags) {


        ExpressionList<Post> expAcc = Post.find.fetch("tags").where().conjunction();


        for( String tag : tags){


            expAcc = expAcc.eq("tags.name", tag);


        }


        return expAcc.endJunction().findList();
    }

I have no idea what to do next, as I am brute forcing this and getting nowhere :(

Thanks!