# Item manquant dans le résultat de la recherche

**URL:** <https://discuss.elastic.co/t/item-manquant-dans-le-resultat-de-la-recherche/156619>\
**Category:** Discussions en français\
**Created:** [November 14, 2018, 9:39am UTC](https://discuss.elastic.co/t/item-manquant-dans-le-resultat-de-la-recherche/156619 "2018-11-14T09:39:47Z")\
**Posts on this page:** 5\
**Page:** 1

<div class="post-metadata">

**Author:** ![RSTMAN](https://avatars.discourse-cdn.com/v4/letter/r/bb73d2/32.png) [@RSTMAN](https://discuss.elastic.co/u/RSTMAN)\
**Post date:** [November 14, 2018, 9:39am UTC](https://discuss.elastic.co/t/item-manquant-dans-le-resultat-de-la-recherche/156619/1 "2018-11-14T09:39:47Z")

</div>

Bonjour,

j'ai index contenant plusieurs formations, quand je fais une recherche sur le titre de la formation: une formation n'est pas présente dans le résultat de recherche.

Création de l'index:

```auto
DELETE formation

PUT formation
{
  "settings": {
    "analysis": {
      "analyzer": {
        "word": {
          "type": "custom",
          "tokenizer": "standard",
          "filter": [
            "lowercase",
            "asciifolding"
          ],
          "char_filter": []
        },
        "prefix": {
          "type": "custom",
          "tokenizer": "standard",
          "filter": [
            "lowercase",
            "asciifolding",
            "prefix_filter"
          ],
          "char_filter": []
        }
      },
      "filter": {
        "prefix_filter": {
          "type": "edge_ngram",
          "min_gram": 1,
          "max_gram": 25
        }
      }
    }
  },
  "mappings": {
    "formation": {
      "properties": {
        "label": {
          "type": "text",
          "analyzer": "word",
          "fields": {
            "prefix": {
              "type": "text",
              "analyzer": "prefix",
              "search_analyzer": "word",
              "norms": false
            }
          },
          "norms": false
        }
      }
    }
  }
}

```

Ajout des données:

```auto

POST _bulk
{ "index":{ "_id": "1", "_index": "formation", "_type": "formation" } }
{ "label":"Cybersécurité" }
{ "index":{ "_id": "2", "_index": "formation", "_type": "formation" } }
{ "label":"Cyber sécurité" }
{ "index":{ "_id": "3", "_index": "formation", "_type": "formation" } }
{ "label":"Agent de sécurité" }
{ "index":{ "_id": "4", "_index": "formation", "_type": "formation" } }
{ "label":"Agent de formation" }

```

Ma requête:

```auto
GET formation/formation/_search
{
  "query": {
    "function_score": {
      "query": {
        "bool": {
          "should": [
            {
              "multi_match": {
                "query": "cybersecurite",
                "fields": [
                  "label.prefix"
                ]
              }
            }
          ]
        }
      },
      "functions": [
        {
          "filter": {
            "multi_match": {
              "query": "cybersecurite",
              "fields": [
                "label"
              ]
            }
          },
          "weight": 10
        }
      ],
      "score_mode": "multiply"
    }
  }
}

```

Resultat de la recherche:

```auto
{
  "took": 1,
  "timed_out": false,
  "_shards": {
    "total": 5,
    "successful": 5,
    "skipped": 0,
    "failed": 0
  },
  "hits": {
    "total": 1,
    "max_score": 2.8768208,
    "hits": [
      {
        "_index": "formation",
        "_type": "formation",
        "_id": "1",
        "_score": 2.8768208,
        "_source": {
          "label": "Cybersécurité"
        }
      }
    ]
  }
}

```

Ma question: pourquoi la formation avec le label "Cyber sécurité" n'est pas dans le résultat de recherche ?  
est-ce que je doit définir des synonymes ?  
Merci

Remarque: la requête de recherche me permet de faire une priorisation des résultats par rapport à la présenece de mot rechercher dans plusieurs champs, c'est pour cette raison que j'utilise **function\_score**

---

<div class="post-metadata">

**Author:** ![dadoonet](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dadoonet/32/137187_2.png) [@dadoonet](https://discuss.elastic.co/u/dadoonet)\
**Post date:** [November 14, 2018, 12:53pm UTC](https://discuss.elastic.co/t/item-manquant-dans-le-resultat-de-la-recherche/156619/2 "2018-11-14T12:53:24Z")

</div>

Cela s'explique ainsi:

Lors de la recherche, voici l'analyseur que tu as décidé d'appliquer aux termes cherchés:

```auto
GET formation/_analyze
{
  "text": ["cybersecurite"],
  "analyzer": "word"
}

```

Ca donne:

```auto
{
  "tokens": [
    {
      "token": "cybersecurite",
      "start_offset": 0,
      "end_offset": 13,
      "type": "<ALPHANUM>",
      "position": 0
    }
  ]
}

```

Mais à l'indexation le terme `Cyber sécurité` a été indexé ainsi:

```auto
GET formation/_analyze
{
  "text": ["Cyber sécurité"],
  "analyzer": "prefix"
}

```

Donne:

```auto
{
  "tokens": [
    {
      "token": "c",
      "start_offset": 0,
      "end_offset": 5,
      "type": "<ALPHANUM>",
      "position": 0
    },
    {
      "token": "cy",
      "start_offset": 0,
      "end_offset": 5,
      "type": "<ALPHANUM>",
      "position": 0
    },
    {
      "token": "cyb",
      "start_offset": 0,
      "end_offset": 5,
      "type": "<ALPHANUM>",
      "position": 0
    },
    {
      "token": "cybe",
      "start_offset": 0,
      "end_offset": 5,
      "type": "<ALPHANUM>",
      "position": 0
    },
    {
      "token": "cyber",
      "start_offset": 0,
      "end_offset": 5,
      "type": "<ALPHANUM>",
      "position": 0
    },
    {
      "token": "s",
      "start_offset": 6,
      "end_offset": 14,
      "type": "<ALPHANUM>",
      "position": 1
    },
    {
      "token": "se",
      "start_offset": 6,
      "end_offset": 14,
      "type": "<ALPHANUM>",
      "position": 1
    },
    {
      "token": "sec",
      "start_offset": 6,
      "end_offset": 14,
      "type": "<ALPHANUM>",
      "position": 1
    },
    {
      "token": "secu",
      "start_offset": 6,
      "end_offset": 14,
      "type": "<ALPHANUM>",
      "position": 1
    },
    {
      "token": "secur",
      "start_offset": 6,
      "end_offset": 14,
      "type": "<ALPHANUM>",
      "position": 1
    },
    {
      "token": "securi",
      "start_offset": 6,
      "end_offset": 14,
      "type": "<ALPHANUM>",
      "position": 1
    },
    {
      "token": "securit",
      "start_offset": 6,
      "end_offset": 14,
      "type": "<ALPHANUM>",
      "position": 1
    },
    {
      "token": "securite",
      "start_offset": 6,
      "end_offset": 14,
      "type": "<ALPHANUM>",
      "position": 1
    }
  ]
}

```

Comme tu peux voir dans cette liste, le terme `cybersecurite` n'existe pas dans cette dernière liste. Donc ça ne matche pas.  
Il faut que tu trouves l'analyseur qui marche pour ton cas.

D'ailleurs, si tu veux faire des combinaisons de termes à l'indexation, tu peux regarder du côté des shingles éventuellement: [https://www.elastic.co/guide/en/elasticsearch/reference/current/analysis-shingle-tokenfilter.html](https://www.elastic.co/guide/en/elasticsearch/reference/current/analysis-shingle-tokenfilter.html)

Tu peux également utiliser l'analyseur `prefix` lors de la recherche mais attention aux faux positifs que ça va donner.

---

<div class="post-metadata">

**Author:** ![RSTMAN](https://avatars.discourse-cdn.com/v4/letter/r/bb73d2/32.png) [@RSTMAN](https://discuss.elastic.co/u/RSTMAN)\
**Post date:** [November 15, 2018, 10:22am UTC](https://discuss.elastic.co/t/item-manquant-dans-le-resultat-de-la-recherche/156619/3 "2018-11-15T10:22:15Z")

</div>

Merci @dadoonet pour la réponse et la réactivité.  
Pour le moment je reste sur ma solution en ajoutant le synonyme et ça fonctionne.

par contre j'ai une autre question qui concerne les filtres, je fais une recherche semblable à ce qui est mentionné avant en y ajoutant les activités et je veux faire un filtre sur une activité sauf que le résultat n'est pas celle que je m'attends, peut-être que j'ai mal construit ma requête ☹

création de l'index avec le nouveau champ:

```auto
DELETE formation
PUT formation
{
  "settings": {
    "analysis": {
      "analyzer": {
        "word": {
          "type": "custom",
          "tokenizer": "standard",
          "filter": [
            "lowercase",
            "asciifolding"
          ],
          "char_filter": []
        },
        "prefix": {
          "type": "custom",
          "tokenizer": "standard",
          "filter": [
            "lowercase",
            "asciifolding",
            "prefix_filter"
          ],
          "char_filter": []
        }
      },
      "filter": {
        "prefix_filter": {
          "type": "edge_ngram",
          "min_gram": 1,
          "max_gram": 25
        }
      }
    }
  },
  "mappings": {
    "formation": {
      "properties": {
        "label": {
          "type": "text",
          "analyzer": "word",
          "fields": {
            "prefix": {
              "type": "text",
              "analyzer": "prefix",
              "search_analyzer": "word",
              "norms": false
            }
          },
          "norms": false
        },
        "activities": {
          "properties": {
            "id": {
              "type": "text",
              "analyzer": "keyword"
            },
            "label": {
              "type": "text",
              "analyzer": "word",
              "fields": {
                "prefix": {
                  "type": "text",
                  "analyzer": "prefix",
                  "search_analyzer": "word"
                }
              },
              "norms": false
            }
          }
        }
      }
    }
  }
}

```

Ajout des données:

```auto
POST _bulk
{ "index":{ "_id": "1", "_index": "formation", "_type": "formation" } }
{ "label":"Opérateur / Opératrice en cybersécurité", "activities": [{"id": "1", "label": "domaine cybersécurité"}] }
{ "index":{ "_id": "2", "_index": "formation", "_type": "formation" } }
{ "label":"Spécialiste en gestion de crise cyber", "activities": [{"id": "1", "label": "domaine cybersécurité"}] }
{ "index":{ "_id": "3", "_index": "formation", "_type": "formation" } }
{ "label":"Cyber documentaliste" }
{ "index":{ "_id": "4", "_index": "formation", "_type": "formation" } }
{ "label":"Animateur / Animatrice de cyberespace" }
{ "index":{ "_id": "5", "_index": "formation", "_type": "formation" } }
{ "label":"Cyber-journaliste" }
{ "index":{ "_id": "6", "_index": "formation", "_type": "formation" } }
{ "label":"Expert / Experte en cybersécurité", "activities": [{"id": "1", "label": "domaine cybersécurité"}] }
{ "index":{ "_id": "7", "_index": "formation", "_type": "formation" } }
{ "label":"Analyste en cybersécurité", "activities": [{"id": "2", "label": "un autre domaine"}] }
{ "index":{ "_id": "8", "_index": "formation", "_type": "formation" } }
{ "label":"Chef d'équipe de sécurité incendie" }
{ "index":{ "_id": "9", "_index": "formation", "_type": "formation" } }
{ "label":"abcd", "activities": [{"id": "2", "label": "un autre domaine"}] }

```

Ma recherche:

```auto
GET formation/_search
{
  "query": {
    "function_score": {
      "query": {
        "bool": {
          "filter": [
            {
              "term": {
                "activities.id": "2"
              }
            }
          ],
          "should": [
            {
              "multi_match": {
                "query": "cybersecurite",
                "fields": [
                  "label.prefix",
                  "activities.label.prefix"
                ]
              }
            }
          ]
        }
      },
      "functions": [
        {
          "filter": {
            "multi_match": {
              "query": "cybersecurite",
              "fields": [
                "label"
              ]
            }
          },
          "weight": 10
        },
        {
          "filter": {
            "multi_match": {
              "query": "cybersecurite",
              "fields": [
                "activities.label"
              ]
            }
          },
          "weight": 3
        }
      ]
    }
  }
}

```

le résultat:

```auto
{
  "took": 1,
  "timed_out": false,
  "_shards": {
    "total": 5,
    "successful": 5,
    "skipped": 0,
    "failed": 0
  },
  "hits": {
    "total": 2,
    "max_score": 1.8232156,
    "hits": [
      {
        "_index": "formation",
        "_type": "formation",
        "_id": "7",
        "_score": 1.8232156,
        "_source": {
          "label": "Analyste en cybersécurité",
          "activities": [
            {
              "id": "2",
              "label": "un autre domaine"
            }
          ]
        }
      },
      {
        "_index": "formation",
        "_type": "formation",
        "_id": "9",
        "_score": 0,
        "_source": {
          "label": "abcd",
          "activities": [
            {
              "id": "2",
              "label": "un autre domaine"
            }
          ]
        }
      }
    ]
  }
}

```

je ne m'attendais pas a avoir la formation "abcd" dans le résultat.

Merci de votre aide.

---

<div class="post-metadata">

**Author:** ![dadoonet](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dadoonet/32/137187_2.png) [@dadoonet](https://discuss.elastic.co/u/dadoonet)\
**Post date:** [November 20, 2018, 7:46pm UTC](https://discuss.elastic.co/t/item-manquant-dans-le-resultat-de-la-recherche/156619/4 "2018-11-20T19:46:20Z")

</div>

Pourquoi tu ne t'y attendais pas ?

Le seul filtre obligatoire est sur `"activities.id": "2"`.

---

<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [December 18, 2018, 7:54pm UTC](https://discuss.elastic.co/t/item-manquant-dans-le-resultat-de-la-recherche/156619/5 "2018-12-18T19:54:54Z")

</div>

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