인프런 커뮤니티 질문&답변

2024-05-16T23:53:30.318+09:00 ERROR 11428 --- [library-app] [ restartedMain] o.s.b.d.LoggingFailureAnalysisReporter :

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APPLICATION FAILED TO START

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Description:

Parameter 0 of constructor in com.group.libraryapp.service.book.BookService required a bean of type 'com.group.libraryapp.domain.book.BookRepository' that could not be found.

Action:

Consider defining a bean of type 'com.group.libraryapp.domain.book.BookRepository' in your configuration.

Process finished with exit code 0

이런 오류가 뜨는데 bean 설정도 강의 내용그대로 한거 같은데 계속 코드를 수정하려고 해도 Error 가 떠서 해결방법을 모르겠습니다

package com.group.libraryapp.service.book;

import com.group.libraryapp.domain.book.Book;
import com.group.libraryapp.domain.book.BookRepository;
import com.group.libraryapp.domain.user.User;
import com.group.libraryapp.domain.user.UserRepository;
import com.group.libraryapp.domain.user.loanhistory.UserLoanHistory;
import com.group.libraryapp.domain.user.loanhistory.UserLoanHistoryRepository;
import com.group.libraryapp.dto.Book.request.BookCreateRequest;
import com.group.libraryapp.dto.Book.request.BookLoanRequest;
import com.group.libraryapp.dto.Book.request.BookReturnRequest;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

@Service
public class BookService {
    private final BookRepository bookRepository;
    private final UserLoanHistoryRepository userLoanHistoryRepository;
    private final UserRepository userRepository;
    public BookService(
            BookRepository bookRepository,
            UserLoanHistoryRepository userLoanHistoryRepository,
            UserRepository userRepository) {
        this.bookRepository = bookRepository;
        this.userLoanHistoryRepository = userLoanHistoryRepository;
        this.userRepository = userRepository;
    }

    @Transactional
    public void saveBook(BookCreateRequest request){
        bookRepository.save(new Book(request.getName()));
    }

    @Transactional
    public void loanBook(BookLoanRequest request){
        Book book = bookRepository.findByName(request.getBookName())
                .orElseThrow(IllegalArgumentException::new);

        if(userLoanHistoryRepository.existsByBookNameAndIsReturn
                (book.getName(),false)){
            throw new IllegalArgumentException("이미 대출되어 있는 책 입니다");
        }

        User user = userRepository.findByName(request.getUsername())
                .orElseThrow(IllegalArgumentException::new);

        userLoanHistoryRepository.save(new UserLoanHistory(user, book.getName()));

    }
    @Transactional
    public void returnBook(BookReturnRequest request){
        User user= userRepository.findByName(request.getUserName())
                .orElseThrow(IllegalArgumentException::new);
        UserLoanHistory history = userLoanHistoryRepository.findByUserIdAndBookName(user.getId(), request.getBookName())
                .orElseThrow(IllegalArgumentException::new);
        history.doReturn();
    }
}

package com.group.libraryapp.domain.book;

import org.springframework.data.jpa.repository.JpaRepository;

import java.util.Optional;

public interface BookRepository extends JpaRepository<Book,Long> {

    Optional<Book> findByName(String bookName);
}