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Java

Posted by Rodrigo Castro
Rodrigo Castro
15,652 Points

Do the Key/Value pairs in the ModelMap object must always be the same?

Do the Key/Value pairs in the ModelMap object must always be the same? By the same I mean the String in the key must be similar to the value, e.g. "gif" => gif.

Thanks.

1 Answer

Alexander Nikiforov
.a{fill-rule:evenodd;}techdegree seal-36
Alexander Nikiforov
Java Web Development Techdegree Graduate 22,175 Points

Sure not. You are talking about Spring Java Framework, right?

If you really want you can do in @Controller :

    @RequestMapping("/gif/{name}")
    public String gifDetails(@PathVariable String name, Model model) {
        Gif gif = gifRepository.findByName(name);
        model.addAttribute("thing", gif);
        return "gif-details";
    }

And then in Thymeleaf template you can access:

<p th:text="${thing.name}"></p>

Although this example might be artificial and unneeded, because you don't know what thing is, I can provide more realistic scenario:

I would say where it can be helpful, for example @Controller :

    @RequestMapping("/")
    public String listGifs(Model model) {
        List<Gif> allGifs = gifRepository.getAllGifs();
        model.addAttribute("gifs", allGifs);
        List<Gif> favoriteGifs = gifRepository.getFavoriteGifs();
        model.addAttribute("favorites", favoriteGifs);
        return "home";
    }

And the use them in Thymeleaf templates favorites and gifs in different places accordingly..

Looks good ?