Adding Node to exisitng documents mongodb - mongodb

Question

I am trying to update the existing document with one extra field as a new requirement in DB needs that
Existing field
[{
"_id": {
"$oid": "62a8ad644035e93c7ff24607"
},
"user_name": "demo2#devia.com",
"password": "1234",
"college_id": {
"$oid": "628dfd41ef796e8f757a5c13"
},
"basic_details": {
"first_name": "ghgh",
"middle_name": "",
"last_name": "gh",
"email": "demo2#devia.com",
"mobile_number": 1234567890
},
"address_details": {
"country": {
"country_id": {
"$oid": "623012f9683f8fb7bd213c36"
},
"country_code": "IN"
},
"state": {
"state_id": {
"$oid": "623013d9683f8fb7bd2381c4"
},
"state_code": "MP"
},
"city": {
"city_id": {
"$oid": "6230139f683f8fb7bd21f1a9"
},
"city_name": "Akodia"
},
"address_line1": "",
"address_line2": "",
"pincode": ""
},
"is_verify": false,
"last_accessed": {
"$date": {
"$numberLong": "1655221604144"
}
},
"created_at": {
"$date": {
"$numberLong": "1655221604144"
}
},
"course_details": {}
}]
Needs to update all fields
[{
"_id": {
"$oid": "62bf2cf2a8c782741bbcc398"
},
"user_name": "a#exaple.com",
"password": "$2b$12$NgLNYm5jUBmFUq.w15.qCO35GiTJX09jAnOpoGuPt9G7GNuOkVN7K",
"college_id": {
"$oid": "628dfd41ef796e8f757a5c13"
},
"basic_details": {
"email": "a#example.com",
"mobile_number": "9898989898",
"first_name": "Fahim",
"middle_name": "",
"last_name": "Ashhab",
"nationality": "Antiguans",
"date_of_birth": "2003-02-04",
"admission_year": "2022-23",
"gender": "Male",
"category": "General",
"para_ability": {
"is_disable": false,
"name_of_disability": ""
}
},
"address_details": {
"communication_address": {
"country": {
"country_id": {
"$oid": "623012f9683f8fb7bd213c36"
},
"country_code": "IN"
},
"state": {
"state_id": {
"$oid": "623013d9683f8fb7bd2380ef"
},
"state_code": "AP"
},
"city": {
"city_id": {
"$oid": "6230139f683f8fb7bd21ebc8"
},
"city_name": "Akasahebpet"
},
"address_line1": "jjkjk",
"address_line2": "uiui",
"pincode": "989898"
}
},
"is_verify": true,
"last_accessed": {
"$date": {
"$numberLong": "1656696050670"
}
},
"created_at": {
"$date": {
"$numberLong": "1656696050670"
}
},
"allocate_to_counselor": {
"counselor_id": {
"$oid": "62bfd13a5ce8a398ad101bd7"
},
"counselor_name": "test",
"last_update": {
"$date": {
"$numberLong": "1656817948401"
}
}
},
"course_details": {
"BSc": {
"course_id": {
"$oid": "628e03d94e22276b98231407"
},
"course_name": "BSc",
"application_id": {
"$oid": "62bf2cf2a8c782741bbcc399"
},
"status": "Incomplete",
"specs": [
{
"spec_name": "Physician Assistant",
"is_activated": true
}
]
}
}
}]
Query Tried nothing is happening
db.collection.aggregate([
{$match:{"address_details.country": {$exists:true}}},
{$set:{address_details:{communication_address:"$address_details"}}}
])
2nd Query Tried didn't go through
db.studentsPrimaryDetails.updateMany({
"address_details.communication_address": {"$exist":false}},
{$set: {"address_details.communication_address":"$address_details"}})
The desired result needs to be
from this
"address_details": {
"country": {
"country_id": {
"$oid": "623012f9683f8fb7bd213c36"
},
"country_code": "IN"
},
"state": {
"state_id": {
"$oid": "623013d9683f8fb7bd2381c4"
},
"state_code": "MP"
},
"city": {
"city_id": {
"$oid": "6230139f683f8fb7bd21f1a9"
},
"city_name": "Akodia"
},
"address_line1": "",
"address_line2": "",
"pincode": ""
}
to this
"address_details": {
"communication_address": {
"country": {
"country_id": {
"$oid": "623012f9683f8fb7bd213c36"
},
"country_code": "IN"
},
"state": {
"state_id": {
"$oid": "623013d9683f8fb7bd2380ef"
},
"state_code": "AP"
},
"city": {
"city_id": {
"$oid": "6230139f683f8fb7bd21ebc8"
},
"city_name": "Akasahebpet"
},
"address_line1": "jjkjk",
"address_line2": "uiui",
"pincode": "989898"
}
}
Don't know what I am doing wrong.
Edit :
Desired full output
[{
"_id": {
"$oid": "62bf2cf2a8c782741bbcc398"
},
"user_name": "a#example.com",
"password": "12345678",
"college_id": {
"$oid": "628dfd41ef796e8f757a5c13"
},
"basic_details": {
"email": "a#example.com",
"mobile_number": "9898989898",
"first_name": "Fahim",
"middle_name": "",
"last_name": "Ashhab",
"nationality": "Antiguans",
"date_of_birth": "2003-02-04",
"admission_year": "2022-23",
"gender": "Male",
"category": "General",
"para_ability": {
"is_disable": false,
"name_of_disability": ""
}
},
"address_details": {
"communication_address": {
"country": {
"country_id": {
"$oid": "623012f9683f8fb7bd213c36"
},
"country_code": "IN"
},
"state": {
"state_id": {
"$oid": "623013d9683f8fb7bd2380ef"
},
"state_code": "AP"
},
"city": {
"city_id": {
"$oid": "6230139f683f8fb7bd21ebc8"
},
"city_name": "Akasahebpet"
},
"address_line1": "jjkjk",
"address_line2": "uiui",
"pincode": "989898"
}
},
"is_verify": true,
"last_accessed": {
"$date": {
"$numberLong": "1656696050670"
}
},
"created_at": {
"$date": {
"$numberLong": "1656696050670"
}
},
"allocate_to_counselor": {
"counselor_id": {
"$oid": "62bfd13a5ce8a398ad101bd7"
},
"counselor_name": "viru chaudhary",
"last_update": {
"$date": {
"$numberLong": "1656817948401"
}
}
},
"course_details": {
"BSc": {
"course_id": {
"$oid": "628e03d94e22276b98231407"
},
"course_name": "BSc",
"application_id": {
"$oid": "62bf2cf2a8c782741bbcc399"
},
"status": "Incomplete",
"specs": [
{
"spec_name": "Physician Assistant",
"is_activated": true
}
]
}
}
}]```

Answer 1

One option is:
Use $exists instead of $exist
Use pipeline in order to be able to $set the value from another fields' value
db.collection.updateMany(
{"address_details.communication_address": {$exists: false}},
[{$set: {address_detailsB: {communication_address: "$address_details"}}},
{$set: {
address_details: "$address_detailsB",
address_detailsB: "$$REMOVE"}
}
])
See how it works on the playground example
The aggregation query that you first tried, does not not update the db, it only returns data. In order to use it as an updater you need to add a $merge step.