Request parameter with thymeleaf - spring

Question

In a Spring Boot web app, User wants to reset his password, so he enters Reset password page. Now I want to let him type his email address, push Reset and I want to redirect to myapp/resetPassword?email=HIS_EMAIL to handle password reset.
MY code:
#RequestMapping(value = "/resetPassword", method = RequestMethod.GET)
public String resetPasswordForm(Model model){
model.addAttribute("email", new String());
return "resetPassword";
}
#RequestMapping(value = "/resetPassword", method = RequestMethod.POST)
public String resetPassword(#RequestParam("email") String email) {
User user = userService.findUserByEmail(email);
//playing with logic
return "redirect:/";
}
How can I achieve it on my thymeleaf page? I tried something like this:
<form th:action="#{/resetPassword(email=${email})}" method="post">
<input type="email" th:field="${email}" th:placeholder="Email" />
<div class="clearfix">
<button type="submit">Reset</button>
</div>
</form>
Unfortunately my email is always null. Can somebody help?

Answer 1

"th:field" is for Entity-Beans only. This should work:
#GetMapping(value = "/resetPassword")
public String resetPassword(#RequestParam(value="email",required=false) String email) {
if(email==null)
return "resetPassword";
User user = userService.findUserByEmail(email);
//playing with logic
return "redirect:/";
}
<form th:action="#{/resetPassword}" method="get">
<input type="email" th:name="email" th:placeholder="Email" />
<div class="clearfix">
<button type="submit">Reset</button>
</div>
</form>
And don't forget: Thymeleaf is not Javascript. It is rendered on Server. Things like #{/resetPassword(email=${email})} would output e.g. /resetPassword?email=anValueYouAddedToModelInController