Mongoose - find(): 搜索选项中的对象不起作用

Question

我有一个看起来像这样的猫鼬模式：

var mySchema = new mongoose.Schema({
  ...
  metadata: {
    isDeleted: {
      type: Boolean,
      default: false
    },
    ...
  }
});

我想获取应用过滤器的mongodb数据库中的元素列表，所以我有以下对象：

var searchOptions = { metadata: { isDeleted: false } };

在执行查询之前，始终需要将该metadata.isDeleted值设置为false，与稍后将添加的其他参数分开：

var objQuery = myModel.find(searchOptions, '-metadata');

起初，我在架构中的对象isDeleted之外有属性metadata，并且

var searchOptions = { isDeleted: false };

used to work perfectly. But it is since I decided to have isDeleted inside my metadata object that is not working and can't figure out why...

Answer 1

It seems pretty likely given your use of elipsis in your schema listing that there are more properties than isDeleted under the metadata property. So your object should be:

var searchOptions = { "metadata.isDeleted": false } };

The reason for this is that otherwise the query is looking for a document with "exactly" and "only" the properties named under the metadata key:

var searchOptions = { metadata: { isDeleted: false } };

And when that is not the case, then of course there is no match.