Node.js 水线方向DB-双向边缘
我在Sails中声明了两个模型,我正在使用Waterline Orientdb适配器,不知道如何通过双向边缘连接它们 问题模型Node.js 水线方向DB-双向边缘,node.js,sails.js,orientdb,waterline,sails-orientdb,Node.js,Sails.js,Orientdb,Waterline,Sails Orientdb,我在Sails中声明了两个模型,我正在使用Waterline Orientdb适配器,不知道如何通过双向边缘连接它们 问题模型 var Waterline = require('waterline'); module.exports = Waterline.Collection.extend({ tableName: 'questionsTable', identity: 'questions', connection: 'associations', attributes
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
}
}
});
应答模型
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一条边。用户创建一个问题,然后用户可以发布响应 您的答案模型上有一个输入错误:
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、答案并将其链接的示例:
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();
})
我在上创建了一个运行示例
问候
更新:水线定向数据库现在命名为sails定向数据库。一个问题可以有许多答案,但一个答案只能有一个问题,似乎您需要将答案中的问题标签更改为
问题{model:'question'}
,这是正确的。但是我想对这个模型进行多对多的建模,并希望获得优势。我将如何做到这一点?