How to create huge random document in MongoDB
Solution 1
Here are some functions that will help you to create a random string(name) and random date since 1950 untill 2000 and insert it into mongodb.
function getRandomInt(min, max) {
return Math.floor(Math.random() * (max - min + 1)) + min;
}
function getRandomDate() {
// aprox nr of days since 1970 untill 2000: 30years * 365 days
var nr_days1 = 30*365;
// aprox nr of days since 1950 untill 1970: 20years * 365 days
var nr_days2 = -20*365;
// milliseconds in one day
var one_day=1000*60*60*24
// get a random number of days passed between 1950 and 2000
var days = getRandomInt(nr_days2, nr_days1);
return new Date(days*one_day)
}
for (var i = 1; i <= 10000; i++) {
db.test.insert(
{
name : "name"+i,
birthday: getRandomDate()
}
)
}
Solution 2
I have try mgeneratejs
, very easy to use, mgeneratejs
here is sample command, mgeneratejs
print data to stdout
, then use mongoimport
import these data into mongod
:
mongodb-osx-x86_64-4.0.1 $ mgeneratejs '{"name": "$name", "age": "$age", "emails": {"$array": {"of": "$email", "number": 3}}}' -n 5 | mongoimport --uri mongodb://localhost:27017/test --collection user --mode insert
2018-08-09T16:19:13.295+0800 connected to: localhost
2018-08-09T16:19:14.544+0800 imported 5 documents
Solution 3
Best way will be read off docs about random generate in mongodb. https://docs.mongodb.com/v2.6/tutorial/generate-test-data/ Also you could use special service for generate random data. For example: https://www.mockaroo.com/
Ender phan
Updated on July 07, 2022Comments
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Ender phan almost 2 years
I am newbie with MongoDB. I'm trying to create a database which will be included 10,000 data. The data will contain "username" and "Birthday".
I want to create 10,000 data with random username and birthday. Do we have a fastest way to create this kind of database?.
Thank you so much for your help!
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Ender phan over 7 yearsThank you so much. It's kindda useful to me. :) @Rider_BY. Do we have able to create a function to do this stuff?. If we could do it, do we still have to insert one by one for its name and birthday?
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Ender phan over 7 yearsThank you for your help. Seem this is decent function to work on with. But, I'm still confused in the "name" part. If I want to create a list of string and the its name gonna be generated by those string, it could be pleasant more than the "name1, name2, name3...."? @Sergiu Zaharie
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sergiuz over 7 yearsYou can generate ransom strings, take a look stackoverflow.com/questions/1349404/…
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Sean over 5 yearsLife saver mate!