Doing a repository method call in viewmodel without transformation.switchmap using GithubBrowserSample

Question

Google's GithubBrowserSample is based on if there is a search made, for it to call for the results. In my scenario, there isn't any search, I just want to call it on fragment load. However, i'm not sure how to do this. Utilising breakpoints and trial and error, I can't seem to flag it to go into the repository method I select. Any tips would be appreciated.

Some snippets of my code:

public class CategoryViewModel extends ViewModel {

    private final LiveData<Resource<List<Category>>> categories;

    @Inject
    CategoryViewModel(@NonNull CategoryRepository categoryRepository){
        categories = categoryRepository.getDBCategories();
    }

Equivalent in the sample:

public class SearchViewModel extends ViewModel {

    private final MutableLiveData<String> query = new MutableLiveData<>();

    private final LiveData<Resource<List<Repo>>> results;

    private final NextPageHandler nextPageHandler;

    @Inject
    SearchViewModel(RepoRepository repoRepository) {
        nextPageHandler = new NextPageHandler(repoRepository);
        results = Transformations.switchMap(query, search -> {
            if (search == null || search.trim().length() == 0) {
                return AbsentLiveData.create();
            } else {
                return repoRepository.search(search);
            }
        });
    }

Answer 1

For anyone else in the same boat, by simply amending the SearchViewModel constructor to hardcode the query, I was soon able to figure out that this could load even on the sample app right away as the data is being observed on the search fragment.

So I turned in SearchViewModel:

@Inject
SearchViewModel(RepoRepository repoRepository) {
    nextPageHandler = new NextPageHandler(repoRepository);
    results = Transformations.switchMap(query, search -> {
        if (search == null || search.trim().length() == 0) {
           return AbsentLiveData.create();
        } else {
            return repoRepository.search(search);
        }
    });
}

To

@Inject
SearchViewModel(RepoRepository repoRepository) {
    results = repoRepository.search("shadow");
    nextPageHandler = new NextPageHandler(repoRepository);
}

Hopefully this helps someone else.