休眠與註解：「在FO實體映射重複列」 - 複合PK

Question

所有我想感謝大家，甚至讀這首先。

我在與我的應用程序在Hibernate FW問題。下圖顯示了導致錯誤的數據庫部分的示意圖。

通過逆向工程autmatically產生我的代碼，並使它工作，我不得不「秀」的代碼生成的module_application表不是多到多臺（使用對自定義逆向工程策略）。現在，當我運行我的代碼，我得到以下錯誤：

Error creating Session: org.hibernate.MappingException: Repeated column in mapping for entity: DAL.module_application.ModuleApplication column: application_id (should be mapped with insert="false" update="false") 

的ModuleApplication類，如下圖所示：

@Entity 
@Table(name = "module_application", catalog = "domotics") 
public class ModuleApplication implements java.io.Serializable 
{ 

    /** 
    * 
    */ 
    private static final long serialVersionUID = 4725933797587110677L; 
    private ModuleApplicationId id; 
    private Application application; 
    private Module module; 
    private Set<ModuleApplicationStatus> moduleApplicationStatuses = new HashSet<ModuleApplicationStatus>(0); 

    public ModuleApplication() 
    { 
    } 

    public ModuleApplication(ModuleApplicationId id, Application application, Module module) 
    { 
     this.id = id; 
     this.application = application; 
     this.module = module; 
    } 

    public ModuleApplication(ModuleApplicationId id, Application application, Module module, Set<ModuleApplicationStatus> moduleApplicationStatuses) 
    { 
     this.id = id; 
     this.application = application; 
     this.module = module; 
     this.moduleApplicationStatuses = moduleApplicationStatuses; 
    } 

    @EmbeddedId 
    @AttributeOverrides(
    { 
     @AttributeOverride(name = "networkAddress", column = @Column(name = "network_address", nullable = false, length = 45)), 
     @AttributeOverride(name = "applicationId", column = @Column(name = "application_id", nullable = false)) 
    }) 
    public ModuleApplicationId getId() 
    { 
     return this.id; 
    } 

    public void setId(ModuleApplicationId id) 
    { 
     this.id = id; 
    } 

    @ManyToOne(fetch = FetchType.LAZY) 
    @JoinColumn(name = "application_id", nullable = false, insertable = false, updatable = false) 
    public Application getApplication() 
    { 
     return this.application; 
    } 

    public void setApplication(Application application) 
    { 
     this.application = application; 
    } 

    @ManyToOne(fetch = FetchType.LAZY) 
    @JoinColumn(name = "network_address", nullable = false, insertable = false, updatable = false) 
    public Module getModule() 
    { 
     return this.module; 
    } 

    public void setModule(Module module) 
    { 
     this.module = module; 
    } 

    @OneToMany(fetch = FetchType.LAZY, mappedBy = "moduleApplication") 
    public Set<ModuleApplicationStatus> getModuleApplicationStatuses() 
    { 
     return this.moduleApplicationStatuses; 
    } 

    public void setModuleApplicationStatuses(Set<ModuleApplicationStatus> moduleApplicationStatuses) 
    { 
     this.moduleApplicationStatuses = moduleApplicationStatuses; 
    } 
} 

我們可以看到，無論是插入和更新設置爲false。如果有人知道這個錯誤的確切原因和/或如何解決它，請分享知識！

Answer 1

我發現你可能在[此帖]（Hibernate Mapping Exception : Repeated column in mapping for entity）相同的問題。

也許你可以使用一個代理鍵爲ID或使用查詢檢索的應用。

你現在用的是對象圖形解決方案，或者你可以使用查詢解決方案：

保持應用程序和模塊的唯一身份作爲ModuleApplication領域。你可以使用查詢檢索應用程序或模塊賦予了ModuleApplication

public class ModuleApplication { 

    private ModuleApplicationId id; 

    private Set<ModuleApplicationStatus> moduleApplicationStatuses = new HashSet<ModuleApplicationStatus>(0); 
} 

Application application = applicationRepository.findBy(moduleApplication.getApplicationId());