[Regex] Handling escape characters

[Prashanth]

Our handling of escape(d) characters needs some love. This issue will catalog the use-cases that don't work. Please add any issue with regex or escaping characters under this issue.

1. db.heroes.find({s: /a\/}) - Fine
   db.heroes.find({s: /a\/}) //comment - Error

2. db.coll.insert({s: "a\\b"}) - inserts a document "a\\\\b"

[codermrrob]

Some use-cases not working

1. regex fail

db.my-collection.insert({
   "valid_date": {
      "type": "string",
       "description": "A date time, format YYYY-MM-DDTHH:MM:SS",
       "pattern": "([12]\\d{3}-(0[1-9]|1[0-2])-(0[1-9]|[12]\\d|3[01]))T(2[0-3]|[01][0-9]):[0-5][0-9]:[0-5][0-9]"
     }
})

inserts

{ 
    "_id" : ObjectId("5c188e72ee87464108fdf112"), 
    "valid_date" : {
        "type" : "string", 
        "description" : "A date time, incoming format is YYYY-MM-DDTHH:MM:SS", 
        "pattern" : "([12]\\\\d{3}-(0[1-9]|1[0-2])-(0[1-9]|[12]\\\\d|3[01]))T(2[0-3]|[01][0-9]):[0-5][0-9]:[0-5][0-9]"
    }
}

2. Escaped quotes in a string

db.my-collection.insert({
    "my-string": "quoted text in a string \"some quoted text\" should be good",
})

inserts

{ 
    "_id" : ObjectId("5c188f98ee87464108fdf113"), 
    "my-string" : "quoted text in a string \\\"some quoted text\\\" should be good"
}

[Stephen Weatherford (MSFT)]

@codermrrob Thanks for letting us know. How important is this fix?

[codermrrob]

Both these issues hit us a lot. So much that the extension is not practically usable in our development team, which is disappointing because we love vscode and use it for building out & editing the json objects we want to store and query, so this extension should be a natural fit. Unfortunately not because of the amount of json schema we use - so we hit the regex issue a lot.

I guess will be the same for anyone who is storing json schema objects/regex expression.

FYI, The database we are using is MongoDB.Atlas and the output from the inserted object was queried and copied from the tree view in Studio3T.

And I notice the string example I posted was incorrect. The inserted object should be:

{ 
    "_id" : ObjectId("5c188f98ee87464108fdf113"), 
    "my-string" : "quoted text in a string \\"some quoted text\\" should be good"
}

(one less '\')

[Azure Tools for VS Code Bot]

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Happy Coding!

[Azure Tools for VS Code Bot]

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