我在Sails中声明了两个模型,并且正在使用Waterline-Orientdb适配器,但不知道如何通过双向边缘进行连接
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一条边缘。用户创建一个问题,然后用户可以发布响应。
最佳答案
您的答案模型中有一个错字:
questions: {
collection: 'questions',
via: 'answer'
}
应该
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();
})
我在github.com/appscot/waterline-orientdb创建了一个正在运行的示例。
问候
更新:waterline-orientdb现在被命名为sails-orientdb。
关于node.js - Waterline-OrientDB-双向边,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/28985075/