ObjectionJS 关系 modelClass 未定义

mtp*_*ltz 1 node.js objection.js

我正在尝试更新 auser和之间的关系user_profile。我可以更新用户,但是当我尝试更新以下内容时,我不断收到此错误user_profile

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

据我所知,我已经模仿了文档和 TypeScript 示例中的示例,但是谁能看出为什么这不起作用?

我包括了查询、模型和用户配置文件迁移。BaseModel 的内容被注释掉了,相当于直接从 Model 继承了,并且jsonSchema只用于验证,所以为了简洁起见我把它们去掉了。

更新

删除relationshipMappingsfrom 会UserProfile阻止错误发生,但由于我需要这种BelongsToOneRelation关系,我仍在尝试。至少它似乎缩小到relationMappingsUserProfile.

询问

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 });
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楷模

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'
      }
    }
  };
}
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移民

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);
    });
};
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Don*_*ken 6

我会这样说

a) 这是循环依赖的问题或/和 b) 导入路径有问题

一种是在模型类中使用绝对文件路径而不是构造函数。例如

 modelClass: __dirname + '/User'
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或者

modelClass: require('./User').default
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查看示例:https : //github.com/Vincit/objection.js/blob/master/examples/express-es7/src/models/Animal.js