How to get variable as response FROM controller TO JavaScript?

Question

I have the following code:

@RestController
public class RestTmp {

    @Autowired
    SchemasService schemasService;

    @RequestMapping(path = "/editSchema/{id}")
    public void editSchemaById(Model model, @PathVariable("id") Integer id, HttpServletResponse response) throws IOException {
        String schemaERD = schemasService.editUser(id);
        model.addAttribute("message", schemaERD);
        response.sendRedirect("/drawdiagram");
    }
}

Can anyone tell me how i can get value from that variable "message" now?
I need to handle that value in my "/drawdiagram" ---> (drawdiagram.html)

I tried with thymeleaf something like that:

<script th:inline="javascript">
    /*<![CDATA[*/

    var message = /*[[${message}]]*/ 'default';
    console.log(message);

    /*]]>*/
</script>

but i am getting null all the time ... Can someone help me? :(

kometen · Accepted Answer · 2020-01-30 14:55:33Z

1

It seems you are adding the "comment-statement" (/* and */) once too many times. Remove them in the inner part. And keep the square brackets.

<script th:inline="javascript">
    /*<![CDATA[*/

    var message = [[${message}]];   <--- Keep square brackets on this line.
    console.log(message);

    /*]]>*/
</script>

I used the same link user404 mentions in the comment-section in that persons answer and that is working for me.

edited Jan 30, 2020 at 14:55

answered Jan 30, 2020 at 14:42

kometen

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user404 · Accepted Answer · 2020-01-29 05:47:32Z

1

inside your script tag, try this:

 var message = '${message}';

answered Jan 29, 2020 at 5:47

user404

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5 Comments

Brarord Over a year ago

Thanks man but this is not solution for me :( i.imgur.com/TbZWPNs.png I don't know why but this is just normal "string" for compiler.

user404 Over a year ago

may be, this one can help: Setting up a JavaScript variable from Spring model by using Thymeleaf

Brarord Over a year ago

I tried that also and i am getting null :( I mentioned that in my post.

user404 Over a year ago

check if your message variable really sets null in controller.

Brarord Over a year ago

Variable "message" in controller is ok, i tried also put sample string like "whatever string" into that "message" and i am getting null also. i.sstatic.net/sBMw8.png

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