From 73093bde9df022b4572a184e5b72ab1c063d3572 Mon Sep 17 00:00:00 2001
From: Richard BAYET <richard.bayet@smile.fr>
Date: Tue, 8 Oct 2024 11:17:39 +0200
Subject: [PATCH] [Core] No edge ngram decomposition in termVectors

To avoid false 'exact' matches on leading parts of a misspelled word.
The logic is similar to the use of a distinct 'search_analyzer' on
fields using 'standard_edge_ngram' as 'analyzer'.
---
 .../Search/Adapter/Elasticsuite/Spellchecker.php           | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/module-elasticsuite-core/Search/Adapter/Elasticsuite/Spellchecker.php b/src/module-elasticsuite-core/Search/Adapter/Elasticsuite/Spellchecker.php
index d324ab5e9..a284a9628 100644
--- a/src/module-elasticsuite-core/Search/Adapter/Elasticsuite/Spellchecker.php
+++ b/src/module-elasticsuite-core/Search/Adapter/Elasticsuite/Spellchecker.php
@@ -164,6 +164,7 @@ private function getTermVectors(RequestInterface $request)
                 MappingInterface::DEFAULT_SPELLING_FIELD => $request->getQueryText(),
             ],
         ];
+        $perFieldAnalyzer = [];
 
         if ($request->isUsingReference()) {
             $doc['fields'][] = MappingInterface::DEFAULT_REFERENCE_FIELD . "." . FieldInterface::ANALYZER_REFERENCE;
@@ -172,9 +173,15 @@ private function getTermVectors(RequestInterface $request)
 
         if ($request->isUsingEdgeNgram()) {
             $doc['fields'][] = MappingInterface::DEFAULT_EDGE_NGRAM_FIELD . "." . FieldInterface::ANALYZER_EDGE_NGRAM;
+            $perFieldAnalyzer[MappingInterface::DEFAULT_EDGE_NGRAM_FIELD . "." . FieldInterface::ANALYZER_EDGE_NGRAM]
+                = FieldInterface::ANALYZER_STANDARD;
             $doc['doc'][MappingInterface::DEFAULT_EDGE_NGRAM_FIELD] = $request->getQueryText();
         }
 
+        if (!empty($perFieldAnalyzer)) {
+            $doc['per_field_analyzer'] = $perFieldAnalyzer;
+        }
+
         $docs = [];
 
         // Compute the mtermvector query on all indices.