this.$__path is not a function for stringify

[WangHansen]

Do you want to request a feature or report a bug?
Report a bug

What is the current behavior?
this.$__path is not a function

If the current behavior is a bug, please provide the steps to reproduce.

see davidmarkclements/fast-safe-stringify#43

What is the expected behavior?
No error

What are the versions of Node.js, Mongoose and MongoDB you are using? Note that "latest" is not a version.
Node: 12.13.1
Mongoose: 5.9.12
mongoDB: 3.6.12

[AbdelrahmanHafez]

I took a look at this yesterday, and decirc function modifies the document by adding a key '[Circular]'
It would be nice if you provide a script that reproduces the issue with the minimal effects that fast-safe-stringify has on the document in order to avoid diving into fast-safe-stringify internals.

[vkarpov15]

I'd advise against using fast-safe-stringify because, as @AbdelrahmanHafez noted, it mutates the object you pass in.

const stringify = require('fast-safe-stringify');

const obj = {};
obj.obj = obj;

console.log(typeof obj.obj); // 'object'

stringify(obj);

console.log(typeof obj.obj); // 'string'

That being said, we'll work around this issue by using symbols for the offending property scope that fast-safe-stringify overwrites.