[Spring Boot] 11. 답변 기능 추가하기

답변 기능 만들기

답변 텍스트 창과 등록 버튼 만들기

question_detail.html

<h1 th:text="${question.subject}">제목</h1>
<div th:text="${question.content}">내용</div>

<form th:action="@{|/answer/create/${question.id}|}" method="post">
	<textarea name="content" id="content" rows="15"></textarea>
	<input type="submit" value="답변 등록">
</form>

 

답변 등록 컨트롤러 만들기

AnswerController.java

package com.mysite.sbb.answer;

import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;

import com.mysite.sbb.question.Question;
import com.mysite.sbb.question.QuestionService;

import lombok.RequiredArgsConstructor;

@RequestMapping("/answer")
@RequiredArgsConstructor
@Controller
public class AnswerController {
	private final QuestionService questionService;
	
	@PostMapping("/create/{id}")
	public String createAnswer(Model model, @PathVariable("id") Integer id,
			@RequestParam(value = "content") String content) {
		Question question = this.questionService.getQuestion(id);
		// TODO : 답변을 저장한다.
		return String.format("redirect:/question/detail/%s", id);
	}
}

 

답변 서비스 만들기

AnswerService.java

package com.mysite.sbb.answer;

import java.time.LocalDateTime;
import org.springframework.stereotype.Service;
import com.mysite.sbb.question.Question;
import lombok.RequiredArgsConstructor;

@RequiredArgsConstructor
@Service
public class AnswerService {
	private final AnswerRepository answerRepository;
	
	public void create(Question question, String content) {
		Answer answer = new Answer();
		answer.setContent(content);
		answer.setCreateDate(LocalDateTime.now());
		answer.setQuestion(question);
		this.answerRepository.save(answer);
	}
}

이제 만든 AnswerService를 AnswerController에서 사용해보자.

AnswerService.java

package com.mysite.sbb.answer;

import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import com.mysite.sbb.question.Question;
import com.mysite.sbb.question.QuestionService;
import lombok.RequiredArgsConstructor;

@RequestMapping("/answer")
@RequiredArgsConstructor
@Controller
public class AnswerController {
	private final QuestionService questionService;
	private final AnswerService answerService;
	
	@PostMapping("/create/{id}")
	public String createAnswer(Model model, @PathVariable("id") Integer id,
			@RequestParam(value = "content") String content) {
		Question question = this.questionService.getQuestion(id);
		
		// TODO : 답변을 저장한다.
		this.answerService.create(question, content);
		
		return String.format("redirect:/question/detail/%s", id);
	}
}

 

답변 등록하기 결과

 

질문 상세페이지에 답변 표시하기

원래 있던 답변들을 질문 아래에 표시하기 위해 question_detail.html 을 수정해보자.

question_detail.html

<h1 th:text="${question.subject}">제목</h1>
<div th:text="${question.content}">내용</div>

<h5 th:text="|${#lists.size(question.answerList)}개의 답변이 있습니다.|"></h5>
<div>
	<ul>
		<li th:each="answer : @{question.answerList}" th:text="${answer.content}"></li>
	</ul>
</div>


<form th:action="@{|/answer/create/${question.id}|}" method="post">
	<textarea name="content" id="content" rows="15"></textarea>
	<input type="submit" value="답변 등록">
</form>

 

결과