unknown top level operator: $orderby

问题

We've a node.js + mongoose app running on Ubuntu linux servers spun on DigitalOcean VPS.

One of our mongoose queries have a text index with the following operators:

less than / equal to
limit
order by

and looks like this:

db.sampleCollection.find({
  $text: {
    $search: userInput
  },
  $lte: {
    expired: (new Date()).addDays(30)
  },
  $limit: 9,
  $orderby: {
    postedAt: -1
  }
})

which throws this error:

unknown top level operator: $orderby

Solutions already considered:

Mongoose uses $set by default, however we're not using that operator in our query
This solution considers aggregation, however we need it for find function
This solution seems to be for array fields, however we need solution for non-array indexes
We're not mixing operators, as said in this solution

Need inputs on how to fix this.

回答1:

Query modifiers like $orderBy are no longer supported:

Starting in v3.2, the query “meta” operators are deprecated in the mongo shell. In the mongo shell, use the cursor methods instead.

As suggested by the docs, use the cursor methods like sort and limit instead:

db.sampleCollection.find({
  $text: {
    $search: userInput
  },
  $lte: {
    expired: (new Date()).addDays(30)
  }
})
.sort({
    postedAt: -1
})
.limit(9);

回答2:

Check your mongodb version orderby has been deprecated since v3.2

$orderby Deprecated in the mongo Shell since v3.2
In the mongo shell,use cursor.sort() instead.

https://docs.mongodb.com/manual/reference/operator/meta/orderby/

db.sampleCollection.find({
    $text   : {
        $search: userInput
    },
    $lte    : {
        expired: (new Date()).addDays(30)
    },
    $limit  : 9,
    $sort: {
        postedAt: -1
    }
})

来源：https://stackoverflow.com/questions/48049038/unknown-top-level-operator-orderby

标签

javascript

node.js

mongodb

mongoose

full-text-indexing