BSON::InvalidKeyName: key must not contain '.' or '$'

[dblock]

We've been getting this error in object save (on Windows) recently
with no code changes. Not sure if the problem is MongoID/bson_ext or
MongoDB, but it's coming from native code somewhere. The error is
BSON::InvalidKeyName: key must not contain '.' (sometimes $). Happens
more frequently with ~100 items with random names generated with a
couple of indexed fields that are similar to the name.

db version v1.6.5, pdfile version 4.5

gems:

bson (1.2.0, 1.1.5)
bson_ext (1.2.0, 1.1.5)
mongo (1.2.0, 1.1.5)
mongoid (2.0.0.rc.1)
mongoid_search (0.1.2)

MongoID thread: http://groups.google.com/group/mongoid/browse_thread/thread/08e192f7d6c85c4f#

Anyone seen this?

[Scott Hernandez]

Are you sure your keys don't have those values in them? Do you use
static strings for the key names?

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[Nat]

How did you generate the random name? even though $ and . are allowed in bson but they should not be used as part of fieldname since it will make the query to be difficult. I think many new drivers disallow it for this purpose. Also please attach the log file / error message, it'll be helpful.

[dblock]

Mystery (almost) solved. This is fixed in bson/bson_ext 1.2.0. If
someone knows the exact bug number (if there was one), please share.

http://code.dblock.org/ShowPost.aspx?id=168

[Kyle Banker]

Nothing regarding key serialization should have changed between 1.1.5
and 1.2.0. Those exceptions will be generated only when you have '.'
or '$' values in your keys. Just made an issue for showing the invalid
key name:

http://jira.mongodb.org/browse/RUBY-233

This will appear in 1.2.1.

[dblock]

@Kyle: no code that I wrote is generating any keys with either . or $
- when I do an insert with mongoid/bson & co., what is generating the
keys?

[Kyle Banker]

If you uninstall bson_ext and run your script again, the exception
will include the key name. Alternatively, if you to install bson_ext
from master, you can see the key name that generated the exception.

[dblock]

Except I don't get any problems with 1.2.0! I ran it a hundred times.
I swear :)

[Drew Miller]

Bah, it must be the name of some key....

On Wed, Nov 7, 2012 at 5:39 PM, xer0x <dre...@gmail.com> wrote:

Okay, I'm getting this error and I swear I haven't changed any of my code. It just popped up after running stable for a month.

Does anyone have more details on what causes this and how to stop it?

This is what we see: (I don't know what icix-robots is..)

[ERROR] Error

Error: key file-icix-robots.key must not contain '.'

    at Error (unknown source)

    at Function.checkKey (./node_modules/mongodb/node_modules/bson/lib/bson/bson.js:1397:11)

    at ./node_modules/mongodb/node_modules/bson/lib/bson/bson.js:350:14

    at ./node_modules/mongodb/node_modules/bson/lib/bson/bson.js:840:23

    at ./node_modules/mongodb/node_modules/bson/lib/bson/bson.js:354:15

    at ./node_modules/mongodb/node_modules/bson/lib/bson/bson.js:840:23

    at ./node_modules/mongodb/node_modules/bson/lib/bson/bson.js:338:15

    at ./node_modules/mongodb/node_modules/bson/lib/bson/bson.js:840:23

    at ./node_modules/mongodb/node_modules/bson/lib/bson/bson.js:354:15

    at ./node_modules/mongodb/node_modules/bson/lib/bson/bson.js:840:23

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