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  1. Node.js Driver
  2. NODE-1645

Bson serialisation throw error on inner keys starting with '$'

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    • Type: Icon: Bug Bug
    • Resolution: Won't Fix
    • Priority: Icon: Blocker - P1 Blocker - P1
    • None
    • Affects Version/s: 3.1.3, 3.1.4
    • Component/s: BSON
    • Labels:
    • Environment:
      OS: macOS 10.13.6 (17G65)
      Node.js: v10.5.0

      Code to reproduce:
      const MongoClient = require("mongodb").MongoClient;

const inner$ = { a: { $b: 1 } };

MongoClient.connect(
  "mongodb://localhost:27017",
  { useNewUrlParser: true }
)
  .then(client => client.db("db").collection("col"))
  .then(collection => collection.insertOne(inner$))
  .then(console.log)
  .catch(console.error)
  .then(() => process.exit());
      Expected:

      Document inserted, as specified in field limitations official documentation :

      Field names can contain dots (i.e. .) and dollar signs (i.e. $). However, only nested field names may start with a dollar sign. For example, attempting to insert { "a" : { "$b": 1 } } will succeed but attempting to insert {"$a": 1} results in error.

      Actual

      Throws error:

      Error: key $b must not start with '$'
    at serializeInto (/Users/barata/Documents/test/npm/node_modules/bson/lib/bson/parser/serializer.js:912:19)
    at serializeObject (/Users/barata/Documents/test/npm/node_modules/bson/lib/bson/parser/serializer.js:348:18)
    at serializeInto (/Users/barata/Documents/test/npm/node_modules/bson/lib/bson/parser/serializer.js:938:17)
    at serializeObject (/Users/barata/Documents/test/npm/node_modules/bson/lib/bson/parser/serializer.js:348:18)
    at serializeInto (/Users/barata/Documents/test/npm/node_modules/bson/lib/bson/parser/serializer.js:728:17)
    at serializeObject (/Users/barata/Documents/test/npm/node_modules/bson/lib/bson/parser/serializer.js:348:18)
    at serializeInto (/Users/barata/Documents/test/npm/node_modules/bson/lib/bson/parser/serializer.js:938:17)
    at BSON.serialize (/Users/barata/Documents/test/npm/node_modules/bson/lib/bson/bson.js:63:28)
    at Query.toBin (/Users/barata/Documents/test/npm/node_modules/mongodb-core/lib/connection/commands.js:146:25)
    at serializeCommands (/Users/barata/Documents/test/npm/node_modules/mongodb-core/lib/connection/pool.js:1045:43)

            Assignee:
            katherine.walker@mongodb.com Katherine Walker (Inactive)
            Reporter:
            Banst Bastien Arata
            Votes:
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            Watchers:
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              Created:
              Updated:
              Resolved: