Mongoimport json file update or overwritte ..?

Question

I'm having DB which name is "Project" and collection which name is "sample" then I inserted one JSON file using mongoimport command.

Now i edited the same JSON file. So if want to import the same JSON file to the Collection then I am facing the problem like multiple instances are created and no updating is not taking place.

Is there any way to update or overwrite the data already present in the mongodb using mongoimport command ?

Note that I also tried using --mode=upsert flag:

./mongoimport --db Project --collection sample --mode=upsert --file   /home/rule.json

Answer 1

For MongoDB v3.x,

--mode=upsert

Answer 2

--drop flag also can be used along with mongoimport command to overwrite/update the existing data.

--drop


./mongoimport --db Project --collection sample --drop --file   /home/UCSC_rule.json

I gave this solution because i have tried using --upsert flag but i could not see any changes in the existing data instead new instance was created.