$relatedQuery 方法不 return 模态实体

Question

我使用 PostgreSQL 和 objection.js for ORM. When I use $relatedQuery method, I get QueryBuilder 对象而不是模型实体。

Here 是示例项目以及如何使用 $relatedQuery 方法。

podcastListener.js

const { Model, snakeCaseMappers } = require('objection');

class Podcast extends Model {
  static get tableName() {
    return 'podcasts_listeners';
  }

  static get columnNameMappers() {
    return snakeCaseMappers();
  }

  static get jsonSchema() {
    return {
      type: 'object',

      properties: {
        id: { type: 'integer' },
        name: { type: 'string', minLength: 1, maxLength: 100 },
      },
    };
  }

  static get relationMappings() {
    return {
      usersRel: {
        relation: Model.BelongsToOneRelation,
        modelClass: `${__dirname}/user`,
        join: {
          from: 'podcasts_listeners.user_id',
          to: 'users.id',
        },
      },

      episodesRel: {
        relation: Model.HasManyRelation,
        modelClass: `${__dirname}/episode`,
        join: {
          from: 'podcasts_listeners.id',
          to: 'episodes.podcasts_listeners_id',
        },
      },
    };
  }
}

module.exports = Podcast;

episode.js

const { Model, snakeCaseMappers } = require('objection');

class Episode extends Model {
  static get tableName() {
    return 'episodes';
  }

  static get columnNameMappers() {
    return snakeCaseMappers();
  }

  static get jsonSchema() {
    return {
      type: 'object',

      properties: {
        podcasts_listeners_id: { type: 'integer' },
        id: { type: 'integer' },
        episode_name: { type: 'string', minLength: 1, maxLength: 100 }, },
        description: { type: 'string' },
      },
    };
  }

  static get relationMappings() {
    return {
      podcastRel: {
        relation: Model.BelongsToOneRelation,
        modelClass: `${__dirname}/podcastListener`,
        join: {
          from: 'episodes.podcasts_listeners_id',
          to: 'podcasts_listeners.id',
        },
      },
    };
  }
}

module.exports = Episode;

如果我运行:

const podcast = await PodcastListener.query()
    .findOne('name', podcastName);

  const episode = podcast
    .$relatedQuery('episodesRel')
    .findById(6);

或：

  const episode = podcast
    .$relatedQuery('episodesRel');

剧集变量是 QueryBuilder 而不是 Episode 模型。

Answer 1

我失踪了 await :

const episode = await podcast
    .$relatedQuery('episodesRel');

$relatedQuery 方法不 return 模态实体

$relatedQuery method doesn't return modal entity

postgresql

orm

node.js

node-postgres

objection.js