Answer by Priyanka Wagh for How to query MongoDB with "like"?

Above answers are perfectly answering the questions about core mongodb query. But when using pattern based search query such as:

{"keywords":{ "$regex": "^toron.*"}}

or

{"keywords":{ "$regex": "^toron"}}

in spring boot jpa repository query with @Query annotation, use query something like:

@Query(value = "{ keyword : { $regex : ?0 }  }")List<SomeResponse> findByKeywordContainingRegex(String keyword);

and call should be either of:

List<SomeResponse> someResponseList =    someRepository.findByKeywordsContainingRegex("^toron");List<SomeResponse> someResponseList =    someRepository.findByKeywordsContainingRegex("^toron.*");

But Never use:

List<SomeResponse> someResponseList = someRepository.findByKeywordsContainingRegex("/^toron/");List<SomeResponse> someResponseList =someRepository.findByKeywordsContainingRegex("/^toron.*/");

Important point to note: each time ?0 field in @Query statement is replaced with double quoted string. so forwardslash(/)should not be used in these cases! always go for pattern using double quotes in searching pattern!! eg. use "^toron" or "^toron.*" over /^toron/ or /^toron.*/