Spring Data Rest&JPA--当实体被方法注释时不呈现结果（通过字段注释工作）

Question

我正在尝试让Spring Data Rest与我的实体一起工作。我实现了存储库，并且在请求localhost:8080时可以看到可用存储库的列表。

但是，当试图通过REST接口执行任何存储库查询时（例如，通过localhost:8080/users执行findAll)，响应是空的。我将该问题追溯到以下几个方面：

另外，有谁知道如何更好地配置系统以更好地处理异常，从而使这些错误不会如此悄无声息地降低？

更多字段和方法之间的不一致：

我还发现，必须为所有字段实现setter和getter，以便在结果JSON中呈现它们。但是，对于非基本字段（例如托管bean)，名称是从字段名称中提取的，而不是从属性中提取的（就像在基本字段中一样）。

  @Entity
  class  User
  {

    @Id
    long Id;
    String firstNameField;
    String lastNameField;
    Account accountField;   //a managed bean

    long getId() ...
    String getFirstName() ...
    String getLastName() ....
    Account getAccount()  ....

}

    {
        firstName: "..."
        lastName: "....."
        accountField:  ".....link..."
      }

好的，这里有一个具体的例子：

/***/

@entity@table(name=“users”,schema=“cars”,catalog=“”）公共类用户{

private int userId;
private String firstName;
private String lastName;
private String password;
private String email;

//todo: Ugh, this is odd...Spring data rest does not seem to render links to ManyToMany properties using method annotation...must add it to the field declaration...removing this from here will result in removing the property from the rest response...needs further investigation
@ManyToMany
@JoinTable (name = "USER_ROLE",
            joinColumns = @JoinColumn(updatable = false, insertable = false, name = "USER_ID", referencedColumnName = "USER_ID"),
            inverseJoinColumns = @JoinColumn(updatable = false, insertable = false, name = "ROLE_ID", referencedColumnName = "ROLE_ID"))
private Collection<Role> roles;



@Id
@Column (name = "USER_ID")
public int getUserId()
{
    return userId;
}


public void setUserId(int inUserId)
{
    userId = inUserId;
}


@Basic
@Column (name = "FIRST_NAME")
public String getFirstName()
{
    return firstName;
}


public void setFirstName(String inFirstName)
{
    firstName = inFirstName;
}


@Basic
@Column (name = "LAST_NAME")
public String getLastName()
{
    return lastName;
}


public void setLastName(String inLastName)
{
    lastName = inLastName;
}


@Basic
@Column (name = "PASSWORD")
public String getPassword()
{
    return password;
}


public void setPassword(String inPassword)
{
    password = inPassword;
}



@Override
public boolean equals(Object o)
{
    ...........
}


@Override
public int hashCode()
{
    ......
}


@ManyToMany
@JoinTable (name = "USER_ROLE",
           joinColumns = @JoinColumn(updatable = false, insertable = false, name = "USER_ID", referencedColumnName = "USER_ID"),
           inverseJoinColumns = @JoinColumn(updatable = false, insertable = false, name = "ROLE_ID", referencedColumnName = "ROLE_ID"))
private Collection<Role> getRoles()
{
    return roles;
}


private void setRoles(Collection<Role> inRoles)
{
    roles = inRoles;
}

@Override
public int hashCode()
{
    ......
}

}

Answer 1

您需要实现getter和setter并注释主键。指南中有几个很好的例子。