DlutAF DlutAF - 13 days ago 4x
Bash Question

mongo:how to query by regex in mongo

I am meeting a problem,just as follows:


and now i want to query the document that the length of phone field is 5. I run the command as follows,




they all do not Work. Could anybody help me figure out, how to use regex in mongo?


If you want to find docs where the phone number is exactly 5 digits, you need to anchor the regex to the start and end of the string with ^ and $:

db.Phone.find({phone: /^\d{5}$/})

Otherwise it will match any string that contains at least 5 digits in a row, anywhere in the string.