Question

有谁知道为什么我无法访问给定author的相关 book？

console.log(book.related('author').toJSON());会打印空对象。

var Book = Bookshelf.Model.extend({

  tableName: 'books',
  hasTimestamps: true,

  author: function() {
    return this.belongsTo(require('./author'));
  },

});

var Author = Bookshelf.Model.extend({

  tableName: 'authors',
  hasTimestamps: true,

  books: function(){
    return this.hasMany(require('./book'), 'author_id');
  },

});

在我的GET /books/{id}路由处理程序中：

var p = new Book({id: req.params.id}).fetch({
    withRelated: ['author']
  }).then(function(book){

      // THIS PRINTS AN EMPTY OBJECT
      console.log(book.related('author').toJSON());

      return {
        book: internals.renderbook(book)
      };
  });

如果我尝试打印而不 .toJSON()，则会显示：

{ attributes: {},
   _previousAttributes: {},
   changed: {},
   relations: {},
   cid: 'c12',
   relatedData: 
    { type: 'belongsTo',
      target: 
       { [Function]
         super_: [Object],
         NotFoundError: [Function: ErrorCtor],
         collection: [Function],
         forge: [Function],
         where: [Function],
         query: [Function],
         fetchAll: [Function],
         extend: [Function],
         __super__: [Object] },
      targetTableName: 'authors',
      targetIdAttribute: 'id',
      foreignKey: 'user_id',
      parentId: 'b3b35d4c-17c3-46bd-90c2-a17fe907b9b8',
      parentTableName: 'books',
      parentIdAttribute: 'id',
      parentFk: undefined } }

Answer 1

我现在无法测试，但模型定义中对require（）的调用对我来说很奇怪......我会写的

author: function() {
  return this.belongsTo(Author);
}

和

books: function(){
  return this.hasMany(Book, 'author_id');
}

PS。由于我无法立即测试，我想将此作为评论但我没有足够的声誉......

无法在bookshelf.js中获取相关对象

1 个答案: