Question

我在Sails中声明了两个模型，我使用的是Waterline-Orientdb适配器，并且不知道如何通过双向边连接它们

问题模型

var Waterline = require('waterline');

module.exports = Waterline.Collection.extend({

  tableName: 'questionsTable',
  identity: 'questions',
  connection: 'associations',

  attributes: {
    id: { type: 'string', primaryKey: true, columnName: '@rid'},
    question  : { type: 'string'},
    user: { model: "User", required: true },
    answerOptions: {type: 'json'},
    imagefile: {type:'string'},
    answers: {
      collection: 'answer',
      via: 'questions',
      dominant:true
    }
  }

});

答案模型

var Waterline = require('waterline');

module.exports = Waterline.Collection.extend({

    tableName: 'answerTable',
    identity: 'answer',
    connection: 'associations',

    attributes: {
        id: {
            type: 'string',
            primaryKey: true,
            columnName: '@rid'
        },
        Answer: {
            type: 'string'
        },
        questions: {
            collection: 'questions',
            via: 'answer'
        }

    }
});

我希望能够在两个模型之间创建边缘。用户创建问题，然后用户可以发布回复。

Answer 1

你的答案模型上有一个拼写错误：

questions: {
  collection: 'questions',
  via: 'answer'
}

应该是

questions: {
  collection: 'questions',
  via: 'answers'  // answers as that is the attribute name in questions model
}

创建问题，答案然后链接它们的示例：

var question1;
ontology.collections.questions.create({ question: 'question1' })
  .then(function(question){
    question1 = question;

    return ontology.collections.answer.create([{ answer: 'answer1' }, { answer: 'answer2' }]);
  })
  .then(function(answers){
    question1.answers.add(answers[0]);
    question1.answers.add(answers[1]);

    return question1.save();
  })

我已在github.com/appscot/waterline-orientdb创建了一个正在运行的示例。

此致

更新： waterline-orientdb现在名为sails-orientdb。

Waterline-OrientDB - 双向边缘

1 个答案: