mongoengine bulk update fields with JSON

Question

I am new to Mongodb and Mongoengine. And I am wondering if there is a way to bulk update MongoDB fields with a json script, for instance:

jsonData = {'name': 'Stak', 'password':'oVeRfLoW'}
User.objects.get(username='u_name').update(jsonData)

Thanks for your answers!

Answer 1

Mongodb's built-in update function, db.collection.update() is very customizable, has options for updating multiple documents at once and doesn't require getting anything beforehand.

You can use it like so:

db.collection.update(
   <query>,
   <update>,
   {
     upsert: <boolean>,
     multi: <boolean>,
     writeConcern: <document>
   }
)

So in this case:

db.collection.update(
   {username:'u_name'}, //1
   {$set:jsonData}, // 2
   {
     multi: true, // 3
   }
)

(

1. the query searches for documents that have
2. $set is IMPORTANT! If you do not use $set, your entire document will be erased and updated to a document containing only your new values. (it will delete all the other fields)
3. Update multiple documents at once.

Keep in mind this is a guideline and you'll have to modify the above code a bit.