Reduce fuzzy maxEdits from 2 to 1 to prevent over-matching

maxEdits=2 was too permissive, causing 'james cameron' to match
'jane campion' (james→jane=2 edits, cameron→campion=2 edits).

maxEdits=1 provides typo tolerance for minor mistakes while
preventing false positives from similar-but-different names.

Author: cbullinger

mflix/server/java-spring/src/main/java/com/mongodb/samplemflix/service/MovieServiceImpl.java

@@ -661,7 +661,7 @@ public List<Movie> searchMovies(MovieSearchRequest searchRequest) {
                                     .append("path", Movie.Fields.DIRECTORS)
                                     .append("matchCriteria", "all")
                                     .append("fuzzy", new Document()
-                                            .append("maxEdits", 2)
+                                            .append("maxEdits", 1)
                                             .append("prefixLength", 2)))
                     ))
                     .append("minimumShouldMatch", 1)
@@ -685,7 +685,7 @@ public List<Movie> searchMovies(MovieSearchRequest searchRequest) {
                                     .append("path", Movie.Fields.WRITERS)
                                     .append("matchCriteria", "all")
                                     .append("fuzzy", new Document()
-                                            .append("maxEdits", 2)
+                                            .append("maxEdits", 1)
                                             .append("prefixLength", 2)))
                     ))
                     .append("minimumShouldMatch", 1)
@@ -709,7 +709,7 @@ public List<Movie> searchMovies(MovieSearchRequest searchRequest) {
                                     .append("path", Movie.Fields.CAST)
                                     .append("matchCriteria", "all")
                                     .append("fuzzy", new Document()
-                                            .append("maxEdits", 2)
+                                            .append("maxEdits", 1)
                                             .append("prefixLength", 2)))
                     ))
                     .append("minimumShouldMatch", 1)

mflix/server/js-express/src/controllers/movieController.ts

@@ -599,7 +599,7 @@ export async function searchMovies(req: Request, res: Response): Promise<void> {
               query: directors,
               path: "directors",
               matchCriteria: "all",
-              fuzzy: { maxEdits: 2, prefixLength: 2 },
+              fuzzy: { maxEdits: 1, prefixLength: 2 },
             },
           },
         ],
@@ -620,7 +620,7 @@ export async function searchMovies(req: Request, res: Response): Promise<void> {
               query: writers,
               path: "writers",
               matchCriteria: "all",
-              fuzzy: { maxEdits: 2, prefixLength: 2 },
+              fuzzy: { maxEdits: 1, prefixLength: 2 },
             },
           },
         ],
@@ -641,7 +641,7 @@ export async function searchMovies(req: Request, res: Response): Promise<void> {
               query: cast,
               path: "cast",
               matchCriteria: "all",
-              fuzzy: { maxEdits: 2, prefixLength: 2 },
+              fuzzy: { maxEdits: 1, prefixLength: 2 },
             },
           },
         ],

mflix/server/python-fastapi/src/routers/movies.py

@@ -170,7 +170,7 @@ async def search_movies(
                     {"text": {"query": directors, "path": "directors", "matchCriteria": "all"}},
                     # Lower score: fuzzy match (typo tolerance)
                     {"text": {"query": directors, "path": "directors", "matchCriteria": "all",
-                              "fuzzy": {"maxEdits": 2, "prefixLength": 2}}}
+                              "fuzzy": {"maxEdits": 1, "prefixLength": 2}}}
                 ],
                 "minimumShouldMatch": 1
             }
@@ -184,7 +184,7 @@ async def search_movies(
                     {"phrase": {"query": writers, "path": "writers"}},
                     {"text": {"query": writers, "path": "writers", "matchCriteria": "all"}},
                     {"text": {"query": writers, "path": "writers", "matchCriteria": "all",
-                              "fuzzy": {"maxEdits": 2, "prefixLength": 2}}}
+                              "fuzzy": {"maxEdits": 1, "prefixLength": 2}}}
                 ],
                 "minimumShouldMatch": 1
             }
@@ -198,7 +198,7 @@ async def search_movies(
                     {"phrase": {"query": cast, "path": "cast"}},
                     {"text": {"query": cast, "path": "cast", "matchCriteria": "all"}},
                     {"text": {"query": cast, "path": "cast", "matchCriteria": "all",
-                              "fuzzy": {"maxEdits": 2, "prefixLength": 2}}}
+                              "fuzzy": {"maxEdits": 1, "prefixLength": 2}}}
                 ],
                 "minimumShouldMatch": 1
             }