Is fluent API a mongoBooster specific feature not mongo?

Yes, Fluent API is a MongoBooster specific feature, not mongo shell method.

We also have Cursor.getShellScript() method return the MongoDB find shell script produced by the MongoBooster Fluent Query Builder. refer to : https://www.mongobooster.com/blog/mongobooster-33-is-out

For example:

Run the following Fluent query script in MongoBooster:

1. db.user.where('age').gte(18).lte(65)
2. .select('name age -_id')
3. .sort("-age name")
4. .limit(5)
5. .skip(100)

.getShellScript()We got the MongoDB shell find script :

1. db.user.find({
2. "age" : {
3. "$gte" : 18,
4. "$lte" : 65
5. }
6. }, {
7. "name" : 1,
8. "age" : 1,
9. "_id" : 0
10. })
11. .sort({ "age" : -1, "name" : 1 })
12. .limit(5)
13. .skip(100)