How to print out more than 20 items (documents) in MongoDB's shell?

db.foo.find().limit(300)

won't do it. It still prints out only 20 doc开发者_如何转开发uments.

db.foo.find().toArray()
db.foo.find().forEach(printjson)

will both print out very expanded view of each document instead of the 1-line version for find():

DBQuery.shellBatchSize = 300

MongoDB Docs - Configure the mongo Shell - Change the mongo Shell Batch Size

From the shell you can use:

db.collection.find().toArray()

to display all documents without having to use it.

You can use it inside of the shell to iterate over the next 20 results. Just type it if you see "has more" and you will see the next 20 items.

Could always do:

db.foo.find().forEach(function(f){print(tojson(f, '', true));});

To get that compact view.

Also, I find it very useful to limit the fields returned by the find so:

db.foo.find({},{name:1}).forEach(function(f){print(tojson(f, '', true));});

which would return only the _id and name field from foo.

With newer version of mongo shell (mongosh) use following syntax:

config.set("displayBatchSize", 300)

instead of depreciated:

DBQuery.shellBatchSize = 300

Future find() or aggregate() operations will only return 300 documents per cursor iteration.

I suggest you to have a ~/.mongorc.js file so you do not have to set the default size everytime.

 # execute in your terminal
 touch ~/.mongorc.js
 echo 'DBQuery.shellBatchSize = 100;' > ~/.mongorc.js
 # add one more line to always prettyprint the ouput
 echo 'DBQuery.prototype._prettyShell = true; ' >> ~/.mongorc.js

To know more about what else you can do, I suggest you to look at this article: http://mo.github.io/2017/01/22/mongo-db-tips-and-tricks.html

In the mongo shell, if the returned cursor is not assigned to a variable using the var keyword, the cursor is automatically iterated to access up to the first 20 documents that match the query. You can set the DBQuery.shellBatchSize variable to change the number of automatically iterated documents.

Reference - https://docs.mongodb.com/v3.2/reference/method/db.collection.find/

show dbs

use your database name in my case, I'm using - use smartbank then - show collections - just to check the document collections name. and finally, db. your collection name.find() or find({}) -

show dbs

use smartbank

show collections

db.users.find() or db.users.find({}) or db.users.find({_id: ObjectId("60c8823cbe9c1c21604f642b")}) or db.users.find({}).limit(20)

you can specify _id:ObjectId(write the document id here) to get the single document

or you can specify limit - db.users.find({}).limit(20)