Check if a path was set but not modified

[Jason Cust]

Since `document.set` will only update a value if it is a value not equal to the current value (see: https://github.com/Automattic/mongoose/blob/53d91e7ef863f35a0a4907f62b9973d23729172d/lib/document.js#L643), is there a way to inquire whether an attempt was made to set the value?

Use case: a modified by field that stores a user objectID. The same user might make two consecutive updates and therefore the field would not be marked as modified. A validation check to see if that field is modified would therefore fail.

Essentially is there a way to indicate it was modified but without a value change (e.g. modified to the same value)?

[Ryan Wheale]

Seems to me like you could make a plugin which does the following:

loops over all the paths for a schema

adds a "setter" function to each path

mark the field as modified every time the setter is called - something like doc.markModified('path_name'))

you can add other properties to the document to keep track of "modified but not changed" paths.

~Ryan

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[Jason Cust]

Thanks Ryan. I was hoping to avoid something of that nature and was wondering if there was a "dirty" flag or similar to indicate a field had been touched and "modified" was if the value changed. I've walked the code a few times and I couldn't find anything like that but was hoping I just glossed over it.