답변(Answer) 유효성 검사 추가

AnswerForm생성 

package com.mysite.sbb.answer;

import javax.validation.constraints.NotBlank;

import lombok.Getter;
import lombok.Setter;

@Getter
@Setter
public class AnswerForm {

	@NotBlank(message = "내용은 필수 항목입니다.")
	private String content;
}

 

 

 

AnswerController

	//답변 저장
	@PostMapping("/create/{id}") //주소에 있는 변수 { }안에 넣기
	public String createAnswer(Model model, @PathVariable("id") Integer id,
							@Valid AnswerForm answerForm, BindingResult result) {
		Question question = this.qService.getQuestion(id);
		if(result.hasErrors()) {
			model.addAttribute("question", question);
			return "question_detail";
		}
		//답변 저장
		aService.create(question, answerForm.getContent());
		return String.format("redirect:/question/detail/%s", id);//질문 상세보기 페이지로 리다이렉트
	}

 

***** @valid 의 위치는 검사할 항목 앞에 붙여준다. 아니면 검사안함!!!!!

 

 

question_detail.html

      <form
        th:action="@{|/answer/create/${question.id}|}"
        th:object="${answerForm}"
        method="post"
        class="my-3"
      >
        <div
          class="alert alert-danger"
          role="alert"
          th:if="${#fields.hasAnyErrors()}"
        >
          <div th:each="err : ${#fields.allErrors()}" th:text="${err}" />
        </div>
        <textarea
          th:field="*{content}"
          rows="10"
          class="form-control"
        ></textarea>
        <input type="submit" value="답변등록" class="btn btn-primary my-2" />
      </form>

 

 

QuestionController - detail수정-

	//상세보기 페이지
	@GetMapping("/detail/{id}")
	public String detail(Model model ,@PathVariable("id") int id,
			 AnswerForm answerForm) {
		Question question = qService.getQuestion(id);
		model.addAttribute("question", question);
		return "question_detail";
	}