Question

I am new in MongoDB.

I am programming an application with spring data and mongodb and I have one class with two fields: firstname and lastname.

I need one query for documents that contain one string in the full name (firstname + lastname).

For example: firstname = "Hansen David", lastname = "Gonzalez Sastoque" and I have a query to find David Gonzalez. In this example I expect there to be a match.

Concatenate two strings solves it but I don’t know how to perform this.

Answer 1

Create a new array field (call it names) in the document and in that array put each name split by space. In your example the array would have the following contents:

1. hansen
2. david
3. gonzalez
4. sastoque

(make them all lower case to prevent case insensitivity issues)

Before you do your query, convert your input to lower case and split it by spaces as well.

Now, you can use the $all operator to achieve your objective:

db.persons.find( { names: { $all: [ "david", "gonzalez" ] } } );