使用@OneToMany或@ManyToMany定位未映射的類SpringBoot

我目前正在使用 Postgresql 學習 Spring Boot 開發。直到今天，當我嘗試在當前物體中再添加一個 OneToMany 關系時，一切都很好，這導致了 Hibernate 例外：

Use of @OneToMany or @ManyToMany targeting an unmapped class: com.github.hryniuklukas.Basic_WMS.model.Document.palletList[com.github.hryniuklukas.Basic_WMS.model.Pallet] 

不幸的是，目前關于 SO 的答案沒有給我任何提示。

兒童班：

import lombok.Getter;
import lombok.NoArgsConstructor;
import lombok.Setter;

import javax.persistence.*;
import java.time.LocalDate;

@NoArgsConstructor
@MappedSuperclass
@Entity
@Table(name = "pallet")
@Getter
@Setter
public class Pallet {
    private @Id @GeneratedValue(strategy = GenerationType.IDENTITY) Long id;
    private String palletCode;
    private LocalDate date;
    private boolean isInWarehouse;
    public Pallet(String palletCode, LocalDate date){
        this.palletCode=palletCode;
        this.date = date;
        this.isInWarehouse = true;
    }

    @ManyToOne(fetch = FetchType.LAZY)
    private PalletSpace palletSpace;
    @ManyToOne(fetch = FetchType.LAZY)
    private Document outboundDocument;
    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (!(o instanceof Pallet )) return false;
        return id != null && id.equals(((Pallet) o).getId());
    }
    public void setPalletStatusAsSent(){
        this.isInWarehouse = false;
    }
    @Override
    public int hashCode() {
        return getClass().hashCode();
    }
}

家長 1：

import lombok.Getter;
import lombok.NoArgsConstructor;
import lombok.Setter;

import javax.persistence.*;
import java.util.ArrayList;
import java.util.List;


@NoArgsConstructor
@Getter
@Setter
@Entity(name = "PalletSpace")
@Table(name = "pallet_space")
public class PalletSpace {
    private @Id @GeneratedValue (strategy = GenerationType.IDENTITY) Long id;
    private String spaceCode;

    @OneToMany(
            mappedBy = "palletSpace",
            cascade = CascadeType.ALL,
            orphanRemoval = true
    )
    private List<Pallet> palletList = new ArrayList<>();
    public PalletSpace(String spaceCode){
        this.spaceCode = spaceCode;
    }
    public void addPallet(Pallet pallet){
        palletList.add(pallet);
        pallet.setPalletSpace(this);
    }
    public void removePallet(Pallet pallet){
        palletList.remove(pallet);
        pallet.setPalletSpace(null);
    }
}

家長 2：

import lombok.Getter;
import lombok.NoArgsConstructor;
import lombok.Setter;
import lombok.extern.slf4j.Slf4j;

import javax.persistence.*;
import java.util.ArrayList;
import java.util.List;

@NoArgsConstructor
@Getter
@Setter
@Slf4j
@Entity
@Table(name = "document")
public class Document {
  private @Id @GeneratedValue(strategy = GenerationType.IDENTITY) Long id;

  @OneToMany(
          mappedBy = "outboundDocument",
          cascade = CascadeType.PERSIST
  )
  private List<Pallet> palletList = new ArrayList<>();


  public void addPalletToDocument(Pallet pallet) {
    palletList.add(pallet);
    pallet.setOutboundDocument(this);
  }

  public List<Pallet> getConnectedPalletList() {
    return this.palletList;
  }

  public void removePalletFromDocument(Pallet pallet) {
    palletList.remove(pallet);
    pallet.setOutboundDocument(null);
  }

  public void executeDocument() {
      palletList.forEach(Pallet::setPalletStatusAsSent);
  }
}

與托盤空間相關的托盤作業正常，將檔案添加到組合中會導致例外。

JPA Buddy 似乎抓住了應有的關系，正確地顯示了參考樹，Spring 并沒有啟動你。

應用屬性：

spring.datasource.url=jdbc:postgresql://localhost:5050/postgres
spring.datasource.username=${DB_USER}
spring.datasource.password=${DB_PASS}
spring.datasource.driverClassName=org.postgresql.Driver
spring.jpa.show-sql=true
spring.jpa.hibernate.ddl-auto=update
spring.jpa.properties.hibernate.dialect = org.hibernate.dialect.PostgreSQLDialect

uj5u.com熱心網友回復：

嘗試從 Pallet 中洗掉 @MappedSuperclass，因為它不應該與 @Entity 混合

標籤：爪哇 弹簧靴 休眠 jpa

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