Spring Data mongo case insensitive like query - full-text-search

Question

I want to make a text search case insensitive with regex query with spring-data mongo .
For example in Oracle :
select * from user where lower(username) like '%ab%'
How can i make this query with spring-data mongo ?
Thanks in advance

Answer 1

You can try something like below. Assumes you have a User pojo class.
Using MongoTemplate
i option for case insensitive:
Criteria regex = Criteria.where("username").regex(".*ab.*", "i");
mongoOperations.find(new Query().addCriteria(regex), User.class);
Using MongoRepository (Case sensitive)
List<User> users = userRepository.findByUserNameRegex(".*ab.*");
interface UserRepository extends MongoRepository<User, String> {
List<User> findByUserNameRegex(String userName);
}
Using MongoRepository with Query dsl (Case sensitive)
List<User> users = userRepository.findByQuery(".*ab.*");
interface UserRepository extends MongoRepository<User, String> {
#Query("{'username': {$regex: ?0 }})")
List<User> findByQuery(String userName);
}
For Non-Regex based query you can now utilize case insensitive search/sort through collation with locale and strength set to primary or secondary:
Query query = new Query(filter);
query.collation(Collation.of("en").
strength(Collation.ComparisonLevel.secondary()));
mongoTemplate.find(query,clazz,collection);

Answer 2

I know this is an old question. I just found the solution in another post.
Use $regex and $options as below:
#Query(value = "{'title': {$regex : ?0, $options: 'i'}}")
Foo findByTitleRegex(String regexString);
see the original answer:
https://stackoverflow.com/a/19068401

Answer 3

#Repository
public interface CompetenceRepository extends MongoRepository<Competence, String> {
#Query("{ 'titre' : { '$regex' : ?0 , $options: 'i'}}")
List<Competence> findAllByTitreLikeMotcle(String motCle);
}
Should works perfectly ,it works in my projects.for words in French too

Answer 4

In repository pattern I tried this and worked
#Query("{ 'username' : ?0 }.collation( { locale: 'en', strength: 2 } )")
User findByUserName(String name);

Answer 5

Yes, you can, provided you have set up it right, I would add something like this in your repository method:
{'username': {$regex: /ab/i }})
#Query("{'username': {$regex: /?1/i }})")
List findUsersByUserName(String userName);

Answer 6

For like query on numeric fields (int or double)
db.players.find({
$and: [{
"type": {
$in: ["football"]
}
},
{
$where : "/^250.*/.test(this.salary)"
}]
})
See the detailed code: Spring Boot mongodb like query on int/double using mongotemplate

Answer 7

String tagName = "apple";
Query query = new Query();
query.limit(10);
query.addCriteria(Criteria.where("tagName").regex(tagName));
mongoOperation.find(query, Tags.class);
Reference - https://mkyong.com/mongodb/spring-data-mongodb-like-query-example/