Question

我有这个查询代码但是有问题使它工作。我使用的是NodeJS，数据库是mongoDB。

  Transducer.find({$and: [{isNew:{$eq:true}}, {isPublished:{$eq:true}}]})
    .sort({"nominalDiameterin":1})
    .limit(50)
    .exec(function(err, allTransducers){
    if(err) {
        throw err;
    } else {
        if(req.xhr) {
            res.json(allTransducers);
        } else {
            var id = req.params.id;
            if(id === 'en'){
                res.render("products/transducers", {transducers: allTransducers, length: allTransducers.length});
            }else if(id === 'cn'){
                res.render("products/transducers-cn", {transducers: allTransducers, length: allTransducers.length});
            }

        }

我想显示新的和已发布的数据，但我没有运气。

请帮忙吗？

Answer 1

亲爱的@Vina Vanessa Compson你不需要使用$和$ eq运算符进行简单查询，你的语法也不正确。

请按照以下答案

var query = {
        isNew:true,
        isPublished:true
  }

  var toSort = {
    nominalDiameterin:1
}
  Transducer.find(query).sort(toSort).limit(50).exec(function(err, allTransducers) {
    if (err) {
      throw err;
    } else {
      if(req.xhr) {
        res.json(allTransducers);
      } else {
        var id = req.params.id;
        if(id === 'en'){
          res.render("products/transducers", {transducers: allTransducers, length: allTransducers.length});
        }else if(id === 'cn'){
          res.render("products/transducers-cn", {transducers: allTransducers, length: allTransducers.length});
        }

      }
    }
  })

MongoError：无法规范化查询：BadValue未知运算符：$和

1 个答案: