未定义 ObjectionJS 关系模型类

ObjectionJS relationship modelClass is not defined

我正在尝试更新 useruser_profile 之间的关系。我可以更新用户,但是当我尝试更新 user_profile:

时,我一直收到此错误

ERROR: Error: UserProfile.relationMappings.user: modelClass is not defined

据我所知,我已经模仿了文档中的示例和 TypeScript 示例,但是有人能看出为什么这不起作用吗?

我包括了查询、两个模型和用户配置文件迁移。 BaseModel的内容被注释掉了,相当于直接继承了Model,jsonSchema只是为了验证,为了简洁我去掉了。

更新

UserProfile 中删除 relationshipMappings 可阻止错误发生,但由于我需要 BelongsToOneRelation 关系,我仍在尝试。至少它似乎缩小到 UserProfile.

上的 relationMappings

查询

const user = await User.query() // <--- Inserts the user
  .insert({ username, password });

const profile = await UserProfile.query() <--- Throws error
  .insert({ user_id: 1, first_name, last_name });

型号

import { Model, RelationMappings } from 'objection';
import { BaseModel } from './base.model';
import { UserProfile } from './user-profile.model';

export class User extends BaseModel {
  readonly id: number;
  username: string;
  password: string;
  role: string;

  static tableName = 'users';

  static jsonSchema = { ... };

  static relationMappings: RelationMappings = {
    profile: {
      relation: Model.HasOneRelation,
      modelClass: UserProfile,
      join: {
        from: 'users.id',
        to: 'user_profiles.user_id'
      }
    }
  };

}

import { Model, RelationMappings } from 'objection';
import { BaseModel } from './base.model';
import { User } from './user.model';

export class UserProfile extends BaseModel {
  readonly id: number;
  user_id: number;
  first_name: string;
  last_name: string;

  static tableName = 'user_profiles';

  static jsonSchema = { ... };

  static relationMappings: RelationMappings = {
    user: {
      relation: Model.BelongsToOneRelation,
      modelClass: User,
      join: {
        from: 'user_profiles.user_id',
        to: 'users.id'
      }
    }
  };
}

迁移

exports.up = function (knex, Promise) {
  return knex.schema
    .createTable('user_profiles', (table) => {
      table.increments('id').primary();

      table.integer('user_id')
        .unsigned()
        .notNullable();
      table.foreign('user_id')
        .references('users.id');

      table.string('first_name');
      table.string('last_name');

      table.timestamps(true, true);
    });
};

我会说

a) 是循环依赖的问题or/and b) 导入路径有问题

一种是在 modelClass 中使用绝对文件路径而不是构造函数。例如

 modelClass: __dirname + '/User'

modelClass: require('./User').default

查看示例: https://github.com/Vincit/objection.js/blob/master/examples/express-es7/src/models/Animal.js