Angular调用Java后端REST API无法获取用户certifications问题已解决

我使用Angular调用Java后端的REST API，接口返回User数组，每个User对象包含certifications数组。在Chrome开发者工具中，console.log整个User对象时展开能看到certifications数组，但单独打印该数组或在页面展示时却无法显示。这会不会是懒加载导致的？

打印空数组的代码片段： #

loadUsers() {
    this.userServ.getUsers().subscribe(
      (users) => {
        this.users = users;
        this.viewUsers = this.users.map((x) => x);
        console.log(this.viewUsers[0].certifications);
      },
      (noUsers) => {
        console.log('Error gettings users from service');
        console.log(noUsers);
      }
    );
  }

展开对象能看到certifications的代码片段： #

loadUsers() {
    this.userServ.getUsers().subscribe(
      (users) => {
        this.users = users;
        this.viewUsers = this.users.map((x) => x);
        console.log(this.viewUsers[0]);
      },
      (noUsers) => {
        console.log('Error gettings users from service');
        console.log(noUsers);
      }
    );
  }

问题已修复。后端返回的JSON字段为"certification"，但前端模型使用的是"certifications"，导致无法访问。修改后端实体字段为"certifications"后恢复正常。感谢大家！

内容的提问来源于stack exchange，提问作者Zr Zone