Question

Spring 1.3.5

我尽我所能来验证这一点;通过Postman传入的JSON与我在测试中生成的JSON相同。通过Postman更新实体工作正常。通过mockMvc进行更新失败。首先，它失败了400，我收到了以下错误：

Could not read document: Already had POJO for id (java.lang.Long) [[ObjectId: key=1, type=com.fasterxml.jackson.databind.deser.impl.PropertyBasedObjectIdGenerator, scope=java.lang.Object]] (through reference chain: com.foo.Department["id"])

在做了一些研究之后，我最终将scope=Department.class添加到了部门的@JsonIdentityInfo。这解决了这个问题（虽然我真的不明白为什么），现在它失败了，因为它声称@OneToOne关系属性为null，即使我通过调试器查看实体是正确的。

这是我的Department实体：

@Entity
@JsonIdentityInfo(generator = ObjectIdGenerators.PropertyGenerator.class, property="id", scope = Department.class)
@JsonRootName(plural = "departments", singular = "department")
public class Department {
  @Id
  @GeneratedValue(strategy = GenerationType.AUTO)
  private Long id;

  @NotNull
  @Size(min = 5, max = 150)
  private String name;

  @ManyToOne(fetch = FetchType.LAZY)
  @JoinColumn(name = "brand_id")
  @JsonBackReference("brand-departments")
  private Brand brand;

  @OneToOne(fetch = FetchType.LAZY)
  @NotNull
  @JoinColumn(name = "department_group_id")
  private DepartmentGroup departmentGroup;

  @NotNull
  @Size(max = 10)
  private String shortDescription;

  // getters and setters

}

同样，通过bootRun并从Postman发布JSON，一切正常。它只在运行我的测试时中断。这是我的测试：

@Test
public void successfulUpdateDepartment() throws Exception {
  Department existingDepartment = departmentService.first();
  UpdateDepartment department = new UpdateDepartment(existingDepartment.getId(), "Chngd Dep Y", existingDepartment.getShortDescription(), new DepartmentGroupId(departmentGroup.getId()));

  mockMvc.perform(put(URL)
       .contentType(contentType)
       .content(this.json(department)))
       .andExpect(status().isOk());
}

Answer 1

我已经确定了为什么这在应用程序运行时有效但不用于测试。如果ID重叠，则使用scope的{{1}}属性。运行应用程序时，Department和DepartmentGroup对@JsonIdentityInfo有不同的值，但在我的测试中，它们都是1.向两个实体添加id解决了问题。

通过运行应用程序更新实体工作，测试失败

1 个答案: