IssueTracker

Component used: Navigation Safe Args
Version used: 1.0.0-alpha01

When using a global action (an action attached to a <navigation> element), all of the destinations under that <navigation> element should extend the <navigation> element's Directions class. This ensures that the final Directions object contains all of the valid actions from that destination on all levels of the navigation graph.

For example:
<navigation
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    app:startDestination="@id/main_fragment">

    <fragment
        android:id="@+id/main_fragment"
        android:name=".MainFragment">
        <action
            android:id="@+id/start_login"
            app:destination="@id/login"/>
    </fragment>
    <navigation
        android:id="@+id/login"
        app:startDestination="@id/login_fragment">
        <action
            android:id="@+id/action_done"
            app:popUpTo="@id/main_fragment"/>
        <fragment
            android:id="@+id/login_fragment"
            android:name=".LoginFragment">
            <action
                android:id="@+id/register"
                app:destination="@id/register_fragment"/>
        </fragment>
        <fragment
            android:id="@+id/register_fragment"
            android:name=".RegisterFragment">
        </fragment>
    </navigation>
</navigation>

There should be
- A LoginDirections class that has an action_done() method (this works right now).
- A LoginFragmentDirections class that extends LoginDirections (currently it does not extend anything)
- An empty RegisterFragmentDirections class that extends LoginDirections (currently it does not exist)