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MongoDB v3 & v4 case insensitivity and diacritic insensitivity bug for Turkish. https://jira.mongodb.org/browse/SERVER-26658
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| // Creation script | |
| db.tr_TR.drop() | |
| db.tr_TR.createIndex({val: "text"}, {default_language: "turkish"}) | |
| db.tr_TR.insert({ _id: "lower_dotless", val : "quıt" }) | |
| db.tr_TR.insert({ _id: "lower_withdot", val : "quit" }) | |
| db.tr_TR.insert({ _id: "upper_dotless", val : "QUIT" }) | |
| db.tr_TR.insert({ _id: "upper_withdot", val : "QUİT" }) | |
| // Query | |
| db.tr_TR.find({$text: {$search: "quit", $language: "tr", $caseSensitive: false, $diacriticSensitive: false}}) | |
| // Expected results | |
| // > { _id: "lower_dotless", val : "quıt" } | |
| // > { _id: "lower_withdot", val : "quit" } | |
| // > { _id: "upper_dotless", val : "QUIT" } | |
| // > { _id: "upper_withdot", val : "QUİT" }) | |
It is a known bug and they still don't have any plan to solve it.
https://jira.mongodb.org/browse/SERVER-26658
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Release Notes:
https://docs.mongodb.org/manual/release-notes/3.2/#relnotes-text-index-v3
Manual:
https://docs.mongodb.org/v3.2/core/index-text/#case-insensitivity
Query:
https://docs.mongodb.org/v3.2/reference/operator/query/text/#definition