This question already has answers here:
Why this update query only update one record once
(3 answers)
Closed 7 years ago.
I'm a beginner in MongoDb.I wanted to know what is the query to remove a field in Mongo DB Collection.I have tried with
db.Component.update({},{$unset: {vendor:""}}).
Its was updating only first document.So How to remove field Completely from Collection?
Try this-db.Component.update({},{$unset: {vendor:""}},false,true)
Here false
Related
This question already has answers here:
MongoDB collection hyphenated name
(2 answers)
Closed 4 months ago.
I am trying to rename/drop, a Mongo collection where I have inadvertently put a . (dot) at the end of the DB collection name so the collection name looks like this:
collectionName.
I'm not able to find a way to use the collection name including the dot to either drop or rename the collection without getting an error back.
Any suggestions whether this is possible.
Check the docs
> use mytestdb
> db.orders.renameCollection( "orders2015" )
This question already has answers here:
Using MongoDB Projection
(1 answer)
How to filter fields from a mongo document with the official mongo-go-driver
(1 answer)
Closed 8 months ago.
There are lots example about how to use go mongodb driver, but less or no example about return ordered field. For example, my document has lots of feilds, but I only want my mongo query return some of fields. Can anyone help me?
https://github.com/mongodb/mongo-go-driver
This question already has answers here:
How to delete documents by query efficiently in mongo?
(5 answers)
Remove only one document in MongoDB
(9 answers)
Closed 4 years ago.
I have a simple action I'm trying to take to delete a single record in my db. I'm following the instructions to the letter:
db.users.deleteOne({login:"theUsersName"})
But for some reason I'm getting the following error:
TypeError: Property 'deleteOne' of object synctup.users is not a function
What am I missing here????
This question already has answers here:
Programmatically build dynamic query with Mongoose
(3 answers)
Dynamic queries in MongoDB and Node.js
(2 answers)
Closed 5 years ago.
Is there anyway to use mongodb to search for ANY instead of omit the query.
Example
db.users.find({country:"Vietnam", gender:ANY}).pretty()
instead of
db.users.find({country:"Vietnam"}).pretty()
This question already has answers here:
A list of indices in MongoDB?
(7 answers)
Closed 8 years ago.
I just want to display all the indexes in the shell.
If you want raw access to the indexes, you can query the db.system.indexes collection:
> db.system.indexes.find()
To find the indexes for a specific collection, you can do:
> db.collection.getIndexes()
See this question.