MongoDB Full Text Search--Search for a specific field is not yet supported

> Db.articles.createIndex ({subject:"text" } ){        "createdcollectionautomatically":true,        "Numindexesbefore":1,        "Numindexesafter":2,        "OK":1}>Db.articles.insert (...      [... {_id:1, Subject:"Coffee", Author:"XYZ", Views: - },... {_id:2, Subject:"Coffee Shopping", Author:"EFG", Views:5 },... {_id:3, Subject:"Baking a cake", Author:"ABC", Views: -  },... {_id:4, Subject:"Baking", Author:"XYZ", Views: - },... {_id:5, Subject:"Caf Con Leche", Author:"ABC", Views: $ },... {_id:6, Subject:".......", Author:"JKL", Views: the },... {_id:7, Subject:"Coffee and Cream", Author:"EFG", Views:Ten },... {_id:8, Subject:"Cafe con Leche", Author:"XYZ", Views:Ten }...    ] ... ) Bulkwriteresult ({"writeerrors" : [ ],        "writeconcernerrors" : [ ],        "ninserted":8,        "nupserted":0,        "nmatched":0,        "nmodified":0,        "nremoved":0,        "upserted" : [ ]})> Db.articles.Find({$text: {$search:"Coffee" } } ){ "_id":2,"subject":"Coffee Shopping","author":"EFG"," views":5 }{ "_id":7,"subject":"Coffee and Cream","author":"EFG"," views":Ten }{ "_id":1,"subject":"Coffee","author":"XYZ"," views": - }> Db.articles.Find({$text: {$search:"\ "Coffee Shop\"" } } ){ "_id":2,"subject":"Coffee Shopping","author":"EFG"," views":5 }> Db.articles.Find({$text: {$search:"\ "Coffee\" \ "Shop\"" } } ){ "_id":2,"subject":"Coffee Shopping","author":"EFG"," views":5 }> Db.articles.Find({$text: {$search:"Coffee Shop" } } ){ "_id":2,"subject":"Coffee Shopping","author":"EFG"," views":5 }{ "_id":7,"subject":"Coffee and Cream","author":"EFG"," views":Ten }{ "_id":1,"subject":"Coffee","author":"XYZ"," views": - }

Reference: https://docs.mongodb.com/manual/reference/operator/query/text/

MongoDB Full Text Search--Search for a specific field is not yet supported