missing updated form of filterByType() method in DesignTacoController in chapter 3 in the book

[charlie39]

After introducing IngredientRepository in chapter 3, the

filterByType(List<Ingredient>, Type type)

in DesignController.java should be updated to to take an
Iterable<Ingredient>
object instead of List<Ingredient> in given in the sample code. But snippet
for such change is missing from the book.
Should have listing showing the change right after Listing 3.7

[AndyLau223]

Yep, I also found the same issue that's not a big problem. Hence, I change the code as below snippet as work around
for (final Ingredient.Type type : types) {
model.addAttribute(type.toString().toLowerCase(),
filterByType((List) ingredients,type));
}

[charlie39]

@AndyLau223 there's another issue in page 76 with the saveIngredientRefs(long tacoId, List<IngredientRef> ingredientRefs)

While calling, saveIngredientRefs(tacoId, taco.Inredients()) ; is passed with a List<Ingredient> object while it actually accepts List<IngredientRefs> object.

[AndyLau223]

@charlie39 You need to change the Taco.class entity by making private List<Ingredient> ingredients = new ArrayList<>(); to private List<IngredientRef> ingredients = new ArrayList<>();

[KianYang-Lee]

Leaving below code to stream iterable for anyone that might need it:

    private Iterable<Ingredient> filterByType(Iterable<Ingredient> ingredients, Type type) {
        return StreamSupport.stream(ingredients.spliterator(), false).filter(x -> x.getType().equals(type))
                .collect(Collectors.toList());