Question

我试图保存我的一个包含用户的实体站点，此用户已在数据库中注册，我也不想保存它。
问题是当我尝试保存网站时，出现以下错误：

org.springframework.dao.InvalidDataAccessApiUsageException: object references an unsaved transient instance - save the transient instance before flushing: com.project.netmg.bo.impl.User; nested exception is org.hibernate.TransientObjectException: object references an unsaved transient instance - save the transient instance before flushing: com.project.netmg.bo.impl.User

我认为，它也尝试保存用户，但这不是我想要的。我只想搜索好用户并将其分配给网站。

java代码：

public String saveSite(@Valid @ModelAttribute SiteForm siteForm, BindingResult bindingResult, Model uiModel) {

    populateSiteforSave(siteForm);
    _siteService.saveSite(siteForm.getSite());
    return WebConstants.REDIRECT_TO_VIEW_SITE_URL + siteForm.getSite().getSiteName();
}

private void populateSiteforSave(SiteForm siteForm) {
    siteForm.getSite().setCountry((Country) _countryService.getCountryByName(siteForm.getSite().getCountry().getName()));
    siteForm.getSite().setBusiness((Business) _businessService.getBusinessById(siteForm.getSite().getBusiness().getId()));
    siteForm.getSite().setStatus((Status) _statusService.getStatusById(siteForm.getSite().getStatus().getId()));
    if (!siteForm.getLocalItFullName().isEmpty()) {
        siteForm.getSite().setLocalIt(_userService.findUserByUserFullName(siteForm.getLocalItFullName())); // user
    } else {
        siteForm.getSite().setLocalIt(null);
    }
    if (!siteForm.getRifFullName().isEmpty()) {
        siteForm.getSite().setRif(_userService.findUserByUserFullName(siteForm.getRifFullName())); //user
    } else {
        siteForm.getSite().setRif(null);
    }
    if (siteForm.getSite().getLocalContact().getId() != null) {
        siteForm.getSite().setLocalContact((User) _userService.findUserByUsername(siteForm.getSite().getLocalContact().getUsername())); //user
    }
}

网站类：

@Entity
@Table(name = "SITE", uniqueConstraints = { @UniqueConstraint(columnNames = { "SITE_COUNTRY_ID", "SITE_NAME" }) })
@Audited(targetAuditMode = RelationTargetAuditMode.NOT_AUDITED, withModifiedFlag = true)
public class Site implements ISite {

/** The Constant serialVersionUID. */
private static final long serialVersionUID = -390717603276436784L;

/** The id. */
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
@Column(name = "SITE_ID", unique = true, nullable = false)
private long id;

/** The site address. */
@Column(name = "SITE_ADDRESS", length = BusinessConstants.SITE_ADDRESS)
private String address;

/** The site analog phone number. */
@Column(name = "SITE_ANALOG_PHONE_NUMBER", length = BusinessConstants.SITE_ANALOG_PHONE_NUMBER)
private String analogPhoneNumber;

/** The site comment. */
@Column(name = "SITE_COMMENT", length = BusinessConstants.SITE_COMMENT)
private String comment;

/** The site entity code. */
@Digits(integer = 3, fraction = 0, message = "Please enter max 3 digits")
@Column(name = "SITE_ENTITY_CODE", nullable = false)
private long entityCode;

/** The site invoice code. */
@Digits(integer = 10, fraction = 0, message = "Please enter max 10 digits")
@Column(name = "SITE_INVOICE_CODE", nullable = false)
private long invoiceCode;

/** The site local it phone. */
@Column(name = "SITE_LOCAL_IT_PHONE", length = BusinessConstants.SITE_LOCAL_IT_PHONE)
private String localItPhone;

/** The site name. */
@NotBlank
@Column(name = "SITE_NAME", nullable = false, length = BusinessConstants.SITE_NAME)
private String siteName;

/** The site subnet. */
@NotBlank
@Column(name = "SITE_SUBNET", nullable = false, length = BusinessConstants.SITE_SUBNET)
private String subnet;

/** The site user number. */
@Digits(integer = 4, fraction = 0, message = "Please enter max 4 digits")
@Column(name = "SITE_USER_NUMBER")
private Long userNumber;

/** The business. */
@Valid
@ManyToOne(fetch = FetchType.LAZY)
@JoinColumn(name = "SITE_BUSINESS_ID", nullable = false)
private Business business;

/** The country. */
@Valid
@ManyToOne(fetch = FetchType.EAGER)
@JoinColumn(name = "SITE_COUNTRY_ID")
private Country country;

/** The local contact. */
@ManyToOne(fetch = FetchType.LAZY)
@JoinColumn(name = "SITE_LOCAL_CONTACT", nullable = true)
private User localContact;

/** The local it. */
@ManyToOne(fetch = FetchType.LAZY)
@JoinColumn(name = "SITE_LOCAL_IT", nullable = true)
private User localIt;

/** The rif. */
@ManyToOne(fetch = FetchType.LAZY)
@JoinColumn(name = "SITE_RIF", nullable = true)
private User rif;

/** The status. */
@Valid
@ManyToOne(fetch = FetchType.LAZY)
@JoinColumn(name = "SITE_STATUS_ID", nullable = false)
private Status status;

/** The end date. */
@Column(name = "SITE_END_DATE")
@Temporal(TemporalType.TIMESTAMP)
@DateTimeFormat(iso = ISO.DATE_TIME)
private Date endDate = null;

@ManyToMany(targetEntity = User.class, mappedBy = "userSites", fetch = FetchType.LAZY)
@NotAudited
private Set<IUser> siteUsers;

用户类：

@Entity
@Table(name = "USERS")
public class User implements IUser {

/** The Constant serialVersionUID. */
private static final long serialVersionUID = 6741623705511494367L;
private static final String USER_ID = "USER_ID";

/** The user id. */
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
@Column(name = USER_ID)
private Long id;

/** The user first name. */
@Column(name = "FIRSTNAME", length = BusinessConstants.USER_FIRSTNAME, nullable = false)
@NotNull
private String userFirstName;

/** The user last name. */
@Column(name = "LASTNAME", length = BusinessConstants.USER_LASTNAME, nullable = false)
@NotNull
private String userLastName;

/** The user email. */
@Column(name = "EMAIL", length = BusinessConstants.USER_EMAIL)
@NotNull
private String userEmail;

/** The user uid. */
@Column(name = "LOGIN", length = BusinessConstants.USER_LOGIN, nullable = false, unique = true)
@NotNull
private String username;

@Valid
@ManyToOne(fetch = FetchType.LAZY)
@JoinColumn(name = "PROFILE_ID", referencedColumnName = "PROF_ID", nullable = false)
private Profile profile;

@BatchSize(size = 20)
@ManyToMany(cascade = { CascadeType.MERGE, CascadeType.PERSIST }, fetch = FetchType.LAZY,targetEntity=Site.class)
@JoinTable(name = "USER_SITE",
joinColumns = { @JoinColumn(name = USER_ID, nullable = false) },
inverseJoinColumns = { @JoinColumn(name = "SITE_ID", nullable = false) })
private Set<ISite> userSites;

@ManyToMany(cascade = { CascadeType.MERGE, CascadeType.PERSIST }, fetch = FetchType.LAZY,targetEntity=Region.class)
@JoinTable(name = "USER_REGION",
joinColumns = { @JoinColumn(name = USER_ID, nullable = false) },
inverseJoinColumns = { @JoinColumn(name = "REGION_ID", nullable = false) })
private Set<IRegion> userRegions;

@BatchSize(size = 20)
@ManyToMany(cascade = { CascadeType.MERGE, CascadeType.PERSIST }, fetch = FetchType.LAZY,targetEntity=Zone.class )
@JoinTable(name = "USER_ZONE",
joinColumns = { @JoinColumn(name = USER_ID, nullable = false) },
inverseJoinColumns = { @JoinColumn(name = "ZONE_ID", nullable = false) })
private Set<IZone> userZones;

@BatchSize(size = 20)
@ManyToMany(cascade = { CascadeType.MERGE, CascadeType.PERSIST }, fetch = FetchType.LAZY,targetEntity=Country.class )
@JoinTable(name = "USER_COUNTRY",
joinColumns = { @JoinColumn(name = USER_ID, nullable = false) },
inverseJoinColumns = { @JoinColumn(name = "COUNTRY_ID", nullable = false) })
private Set<ICountry> userCountries;

@Transient
private Collection<? extends GrantedAuthority> authorities;

@Transient
private String userFullName;

Answer 1

你不可能两种方式都有。如果对象图包含User，那么如果在代码中更改，它将（必须）保留。你有没有考虑过它是什么意思来获取Site（包括User），然后更改localContact并再次坚持Site？

如果您希望localContact可以在对象图中设置，但不能保留，则可以使用@Transient进行注释：

/** The local contact. */
@Transient
private User localContact;

希望有所帮助。

干杯，

Answer 2

您是否已将cascade = CascadeType.ALL注释为实体对象映射

例如：

     @ManyToOne(cascade = CascadeType.ALL)
      private String entityType;

“冲洗前保存瞬态对象”错误

2 个答案: