How do I query a field from Mongo where the value is actually a number but stored as string?

user_1119206 0
Viewed 435

The confusing part is the number in the string field can be with leading zeros but my query param will not contain that

Object 1:

{
"_id" : ObjectId("5c3f6aec29c2e3193315b485"),
"flightCode" : "000541300157840"
}

Object 2: 

{
"_id" : ObjectId("5c3f6aec29c2e3193315b485"),
"flightCode" : "00054130015784"
}

If my intent is to find flight code that matches number 54130015784, how will I write my query?

mongodb-query mongodb nosql regex
2 Answers

You need $regex operator with following regular expression:

var code = "541300157840";
var regex = "^0*" + code + "$"

db.col.find({ flightCode: { $regex: new RegExp(regex) } })

where * means that 0 occurs zero or more times which means that it works both for 000541300157840 and for 541300157840

user_62389770

If you think that your data would have text flight code so the string can be identified, we can use this.

Regex:
54130015784(?="\n)

Explanation:

Positive Lookahead (?="\n)
Assert that the Regex below matches
" matches the character " literally (case sensitive)
\n matches a line-feed (newline) character (ASCII 10)

Example:
https://regex101.com/r/sF0YfH/3

Let me know if it works. If not give a clear idea what you want.

user_69424880
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