Play framework (2.3.5) - Template accessing an inner class fails

Question

I have a class defined like so (pseudo code):

package com.some.namespace

public class SomeClass {

    protected SomeClass() {}

    // stuff...

    public class SomeInnerClass {

        public SomeInnerClass() {}

        // more stuff (accesses instance variables from SomeClass)...

    }

}

Then in my template I use the reusable block defines like so:

@doSomething(val: com.some.namespace.SomeClass.SomeInnerClass) = {

    // even more stuff...

}

But I get the error:

type SomeInnerClass is not a member of object com.some.namespace.SomeClass

Am I not able to access inner classes within the templates or is this supposed to work? (if it is supposed to work I might need to post my actual code)

Doesn't your inner class need to be static? If it is it should work just like any other class. — Mikesname, Mar 02 '15 at 21:55
I don't think so, `SomeClass` is a singleton that I access in the view which has a list of the `SomeInnerClass` classes which I get via a getter and pass to the reusable block inside a for loop. In fact if I make the inner class static it will break my code as `SomeClass` is required to be an instance and therefore `SomeInnerClass` doesn't need (or want) to be static because it accesses instance variables from the `SomeClass` class, no? — Neilos, Mar 02 '15 at 22:01

score 3 · Accepted Answer · edited May 23 '17 at 12:32

It should work, but because SomeInnerClass is a dependent type, i.e. dependent on your singleton outer class instance, you need to write it like:

@doSomething(value: com.some.namespace.SomeClass#SomeInnerClass) = {
    // even more stuff...
}

The SomeClass#SomeInnerClass syntax in Scala means, vaguely, a SomeInnerClass from any instance of SomeClass. See this answer for more detail.

If the inner class was static, however, your current SomeClass.SomeInnerClass syntax would be the way to go.

Play framework (2.3.5) - Template accessing an inner class fails

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