使用以下函数,操作无法正确构建标准。
getArticlesByUser:function(cb,val)
{
Article.find({state:'Normal'}).populate('user', {id: cb.iduser }).populate('images').populate('devise').exec(function(err,article){
if(article)
{
val(null,article);
}
if(err)
{
val(err,null);
}
})
}
它似乎忽略了用户
模型的标准。
我该如何修复它?
最佳答案
填充方法有 2 个参数:
- 外键:属性名称
- 查询(可选):限制填充值列表
如示例 in the docs 所示,第二个参数不是必需的,仅当您具有一对多关联时才有用。
例如,如果您有以下模型:
// Article.js
module.exports = {
attributes: {
author: { model: 'user' },
title: { type: 'string' }
}
};
// User.js
module.exports = {
attributes: {
articles: {
collection: 'article',
via: 'author'
},
name: { type: 'string' }
}
};
以下是使用填充
的一些方法:
// Get a user from his name
User.findOne({ name: 'Pisix' }).function(err, result) {
console.log(result.toJSON());
});
/*
{ name: 'Pisix',
createdAt: Wed Jun 20 2015 14:07:25 GMT-0600 (CST),
updatedAt: Wed Jun 20 2015 14:07:25 GMT-0600 (CST),
id: 7 }
*/
// Get a user from his name + his articles
User.findOne({ name: 'Pisix' }).populate('articles').function(err, result) {
console.log(result.toJSON());
});
/*
{ articles:
[ { title: 'The first article',
id: 1,
createdAt: Wed Jun 20 2015 14:12:33 GMT-0600 (CST)
updatedAt: Wed Jun 20 2015 14:12:33 GMT-0600 (CST) },
{ title: 'Another article',
id: 2,
createdAt: Wed Jun 21 2015 15:04:12 GMT-0600 (CST)
updatedAt: Wed Jun 21 2015 15:04:12 GMT-0600 (CST) },
{ title: 'I\'m back',
id: 10,
createdAt: Wed Jun 30 2015 13:25:45 GMT-0600 (CST)
updatedAt: Wed Jun 30 2015 13:25:45 GMT-0600 (CST) } ],
name: 'Pisix',
createdAt: Wed Jun 20 2015 14:07:25 GMT-0600 (CST),
updatedAt: Wed Jun 20 2015 14:07:25 GMT-0600 (CST),
id: 7 }
*/
// Get a user from his name + one of his articles from its title
User.findOne({ name: 'Pisix' }).populate('articles' , { title: 'The first article' }).function(err, result) {
console.log(result.toJSON());
});
/*
{ articles:
[ { title: 'The first article',
id: 1,
createdAt: Wed Jun 20 2015 14:12:33 GMT-0600 (CST)
updatedAt: Wed Jun 20 2015 14:12:33 GMT-0600 (CST) } ],
name: 'Pisix',
createdAt: Wed Jun 20 2015 14:07:25 GMT-0600 (CST),
updatedAt: Wed Jun 20 2015 14:07:25 GMT-0600 (CST),
id: 7 }
*/
就您而言,您想要获取用户的文章。具体方法如下:
// Get articles of a user from his id
Article.find({ author: 7 }).exec(function (err, result) {
console.log(result.toJSON());
});
/*
[ { title: 'The first article',
id: 1,
createdAt: Wed Jun 20 2015 14:12:33 GMT-0600 (CST)
updatedAt: Wed Jun 20 2015 14:12:33 GMT-0600 (CST) },
{ title: 'Another article',
id: 2,
createdAt: Wed Jun 21 2015 15:04:12 GMT-0600 (CST)
updatedAt: Wed Jun 21 2015 15:04:12 GMT-0600 (CST) },
{ title: 'I\'m back',
id: 10,
createdAt: Wed Jun 30 2015 13:25:45 GMT-0600 (CST)
updatedAt: Wed Jun 30 2015 13:25:45 GMT-0600 (CST) } ]
*/
关于javascript - 填充条件失败,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/31138771/