Operators for MongoDB/BSON numeric types

Question

Operators for MongoDB/BSON numeric types

devkev opened this issue 7 years ago · comments

eg. $numberInt, $numberLong, $numberDecimal

Looks like these are the main things from the BSON spec which are missing in mgenerate.js. They would vaguely work like change.integer(), and/or maybe also change.dollar() for $numberDecimal.

Code is also missing (but it's very infrequently encountered). So are deprecated BSON types like DBPointer/DBRef, Symbol, and undefined (but being deprecated, they don't really matter).

Thomas Rückstieß · Answer 1 · Wed Feb 01 2017 19:30:48 GMT+0800 (China Standard Time)

Those are already there, just not documented yet. Adding to README now.

Emil Zegers · Answer 2 · Tue May 10 2022 23:03:18 GMT+0800 (China Standard Time)

Hi @rueckstiess
I have a json document with $date, $numberLong, $numberInt. Using mgeneratejs 0.5.1 it fails on $numberInt, while $date and $numberLong are ok.

node:events:505
      throw er; // Unhandled 'error' event
      ^

Error: unknown operator: $numberInt
Message: TypeError: chance[op] is not a function
    at callOperator (/usr/local/lib/node_modules/mgeneratejs/lib/index.js:59:11)
    at evalValue (/usr/local/lib/node_modules/mgeneratejs/lib/index.js:111:14)
    at /usr/local/lib/node_modules/mgeneratejs/node_modules/lodash/lodash.js:13469:38
    at /usr/local/lib/node_modules/mgeneratejs/node_modules/lodash/lodash.js:4967:15
    at baseForOwn (/usr/local/lib/node_modules/mgeneratejs/node_modules/lodash/lodash.js:3032:24)
    at Function.mapValues (/usr/local/lib/node_modules/mgeneratejs/node_modules/lodash/lodash.js:13468:7)
    at evalObject (/usr/local/lib/node_modules/mgeneratejs/lib/index.js:72:18)
    at evalValue (/usr/local/lib/node_modules/mgeneratejs/lib/index.js:113:12)
    at arrayMap (/usr/local/lib/node_modules/mgeneratejs/node_modules/lodash/lodash.js:653:23)
    at Function.map (/usr/local/lib/node_modules/mgeneratejs/node_modules/lodash/lodash.js:9622:14)
Emitted 'error' event on Stream instance at:
    at Stream.onerror (node:internal/streams/legacy:62:12)
    at Stream.emit (node:events:527:28)
    at Immediate.<anonymous> (/usr/local/lib/node_modules/mgeneratejs/node_modules/event-stream/index.js:176:16)
    at processImmediate (node:internal/timers:466:21)

Thomas Rückstieß · Answer 3 · Wed May 11 2022 09:45:25 GMT+0800 (China Standard Time)

Hi @taatuut,

Thanks for reporting this. Initially I didn't add a $numberInt operator, because $number / $integer already exist in chance.js and can be used. But I realised they are actually producing numbers between -2^53 and +2^53-1 (Biggest number in Javascript).

To clean up this mess and make it more compatible with what MongoDB does, I did the following:

Changed the behaviour of $number / $integer to return a 32-bit integer with value between -2^31 and +2^31-1.
Added another alias $numberInt to map to $integer.
Added this to the documentation here: https://github.com/rueckstiess/mgeneratejs#numberint

You can get the latest version by upgrading to 0.6 via npm update -g mgeneratejs.

Hope that solves this issue.

Emil Zegers · Answer 4 · Fri May 13 2022 14:39:13 GMT+0800 (China Standard Time)

Hi @rueckstiess, thanks for the quick action, works without issues now!