Push to document array fails

[avichaishapira1]

This behavior exists in version 5.7.8
This behavior does not exist in version 5.6.9

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

Bug

What is the current behavior?

story is a complex document with many subdocuments and subdocuments arrays
let obj = story.segmentation // this is a subdocument array
let segmentation = {
// json object contains fields according to Segmentation model
}
obj.push(segmentation)

Error output:

Cannot read property ' __$' of undefined\nTypeError: Cannot read property ' __$' of undefined\n at _updateParentPopulated (/Users/avichaishapira/IdeaProjects/bigvu-webserver/node_modules/mongoose/lib/types/documentarray.js:323:14)\n at CoreDocumentArray.push (/Users/avichaishapira/IdeaProjects/bigvu-webserver/node_modules/mongoose/lib/types/documentarray.js:187:5)\n

What is the expected behavior?

array.push is successful

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

Node v12.10.0
Mongoose v5.7.8
MongoDB v3.3.0

[nsberndt]

I experienced the same issue, specifically in version 5.7.8 vs. 5.7.7. It seems there is a bug in the latest patch release.

Reverting to 5.7.7 fixed the issue for me, but I would anticipate others are going to continue to experience this bug in 5.7.8.

I believe it may be related to 9b0e96d .

[ShazzyK]

Facing same issue, reverting to 5.7.7 fixed it for me as well. It is occuring when pushing to a document array placed within a findOne query. Here are my error logs:

events.js:174
throw er; // Unhandled 'error' event
[0] ^
[0]
[0] TypeError: Cannot read property '$__' of undefined
[0] at _updateParentPopulated (C:\X\X\X\X\X\node_modules\mongoose\lib\types\documentarray.js:323:14)
[0] at CoreDocumentArray.push (C:\X\X\X\X\X\node_modules\mongoose\lib\types\documentarray.js:187:5)
[0] at userModel.findOne (C:\X\X\X\X\X\NewsfeedServer.js:132:20)
[0] at C:\X\X\X\X\X\node_modules\mongoose\lib\model.js:4600:16
[0] at C:\X\X\X\X\X\node_modules\mongoose\lib\query.js:4351:12
[0] at process.nextTick (C:\X\X\X\X\X\node_modules\mongoose\lib\query.js:2849:28)
at process._tickCallback (internal/process/next_tick.js:61:11)
[0] Emitted 'error' event at:

[vkarpov15]

Should be fixed by #8351 in 5.7.12

[nbcraft]

@vkarpov15
In 5.7.12 (but also 5.7.7) calling .splice on a CoreDocumentArray errors this out:

     TypeError: Cannot read property 'casterConstructor' of undefined
      at CoreDocumentArray._cast (node_modules/mongoose/lib/types/documentarray.js:46:47)
      at CoreDocumentArray.splice (node_modules/mongoose/lib/types/core_array.js:759:16)
      at CoreDocumentArray.splice (node_modules/mongoose/lib/types/documentarray.js:234:30)

Is this related to this issue? Am I doing something wrong?
Thanks in advance.

EDIT:
Happens in 5.6.13 - Seems to be CoreMongooseArray then
Looks fine in 5.5.15 - Still CoreMongooseArray
Looks fine in 5.0.18 - Is a a regular JS Array then though, so that makes sense.

[vkarpov15]

@nbcraft the issue you're experiencing looks slightly different, looks like a different error message. Can you please open up a separate issue and follow the issue template?