`InIgnoreCase` queries match on substrings

[zlaval]

The generated query is not ok in case of using in expression with IgnoreCase.

Example:

@Document(collection = "mydata")
data class MyData(
   @Id
    val id: String,
    val name: String,
)

I have a list of names and I would like to query for documents which name is in the list case insensitively.

Using fun findAllByNameInIgnoreCase(names: List<String>) creates the following mongo query:

"name" : { "$in" : [{ "$regularExpression" : { "pattern" : "\\QTest One\\E", "options" : "i"}}, { "$regularExpression" : { "pattern" : "\\QTest Two\\E", "options" : "i"}}]}

The problem it will also match to Test Two Something.

This works just fine in case of fun findByNameIgnoreCase(names: String), which generates this query:

"name" : { "$regularExpression" : { "pattern" : "^Test One$", "options" : "i"}}

So i think this would be consistent if the generated query was:

"name" : { $in : [{ "$regularExpression" : { "pattern" : "^\\QTest One\\E$", "options" : "i"}}, { "$regularExpression" : { "pattern" : "^\\QTest Two\\E$", "options" : "i"}}]}

This would results in the expected result, as the query method does not contains Regex expression even if mongo solves case insensivity with regex.

[christophstrobl]

Thanks @zlaval for raising the issue.