Question

I have a document called login_info. It has two fields:

• name
• password
• Location

Location is an embedded document with two fields:

• datetime
• city

There are datas in the embedded document and i want to delete a row from it.
for eg: i have to delete all the rows with location “Canada”. How can i do this in mongo engine ? any help

Answer 1

Try this

db.login_info.update({}, {$pull:{location:{city:"Canada"}}})

Ok try this instead

db.login_info.update( { "location.city" : { $exists : true } }, { $unset : { "location.city" : "Canada" } }, false, true);

This will remove all “rows” where city is “Canada”.