1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55

use serde::{Serialize, Serializer};

/// The way the `multi_match` query is executed internally.
///
/// <https://www.elastic.co/guide/en/elasticsearch/reference/current/query-dsl-multi-match-query.html#multi-match-types>
#[derive(Debug, Clone, Copy, PartialEq)]
pub enum MultiMatchQueryType {
    /// Finds documents which match any field, but uses the `_score` from the
    /// best field. See
    /// [`best_fields`](https://www.elastic.co/guide/en/elasticsearch/reference/current/query-dsl-multi-match-query.html#type-best-fields).
    BestFields(Option<super::TieBreaker>),

    /// Finds documents which match any field and combines the `_score` from
    /// each field. See
    /// [`most_fields`](https://www.elastic.co/guide/en/elasticsearch/reference/current/query-dsl-multi-match-query.html#type-most-fields).
    MostFields,

    /// Treats fields with the same `analyzer` as though they were one big
    /// field. Looks for each word in **any** field. See
    /// [`cross_fields`](https://www.elastic.co/guide/en/elasticsearch/reference/current/query-dsl-multi-match-query.html#type-cross-fields).
    CrossFields,

    /// Runs a `match_phrase` query on each field and uses the `_score` from
    /// the best field. See
    /// [`phrase` and `phrase_prefix`](https://www.elastic.co/guide/en/elasticsearch/reference/current/query-dsl-multi-match-query.html#type-phrase).
    Phrase,

    /// Runs a `match_phrase_prefix` query on each field and uses the `_score`
    /// from the best field. See
    /// [`phrase` and `phrase_prefix`](https://www.elastic.co/guide/en/elasticsearch/reference/current/query-dsl-multi-match-query.html#type-phrase).
    PhrasePrefix,

    /// Creates a `match_bool_prefix` query on each field and combines the
    /// `_score` from each field. See
    /// [`bool_prefix`](https://www.elastic.co/guide/en/elasticsearch/reference/current/query-dsl-multi-match-query.html#type-bool-prefix).
    BoolPrefix,
}

impl Serialize for MultiMatchQueryType {
    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
    where
        S: Serializer,
    {
        let value = match self {
            Self::BestFields(_) => "best_fields",
            Self::MostFields => "most_fields",
            Self::CrossFields => "cross_fields",
            Self::Phrase => "phrase",
            Self::PhrasePrefix => "phrase_prefix",
            Self::BoolPrefix => "bool_prefix",
        };

        serializer.serialize_str(value)
    }
}