fix the import of dump v2 generated by meilisearch v0.22.0

dump/src/reader/compat/snapshots/dump__reader__compat__v1_to_v2__test__compat_v1_v2-3.snap

@@ -10,6 +10,7 @@ expression: products.settings().unwrap()
     "*"
   ],
   "filterableAttributes": [],
+  "sortableAttributes": [],
   "rankingRules": [
     "typo",
     "words",

dump/src/reader/compat/snapshots/dump__reader__compat__v1_to_v2__test__compat_v1_v2-6.snap

@@ -13,13 +13,17 @@ expression: movies.settings().unwrap()
     "genres",
     "id"
   ],
+  "sortableAttributes": [
+    "genres",
+    "id"
+  ],
   "rankingRules": [
     "typo",
     "words",
     "proximity",
     "attribute",
     "exactness",
-    "asc(release_date)"
+    "release_date:asc"
   ],
   "stopWords": [],
   "synonyms": {},

dump/src/reader/compat/snapshots/dump__reader__compat__v1_to_v2__test__compat_v1_v2-9.snap

@@ -10,6 +10,7 @@ expression: spells.settings().unwrap()
     "*"
   ],
   "filterableAttributes": [],
+  "sortableAttributes": [],
   "rankingRules": [
     "typo",
     "words",

dump/src/reader/compat/v1_to_v2.rs

@@ -1,4 +1,3 @@
-use std::collections::BTreeSet;
 use std::str::FromStr;
 
 use super::v2_to_v3::CompatV2ToV3;
@@ -102,14 +101,15 @@ impl CompatIndexV1ToV2 {
 
 impl From<v1::settings::Settings> for v2::Settings<v2::Unchecked> {
     fn from(source: v1::settings::Settings) -> Self {
-        let displayed_attributes = source
+        Self {
-            .displayed_attributes
+            displayed_attributes: option_to_setting(source.displayed_attributes)
-            .map(|opt| opt.map(|displayed_attributes| displayed_attributes.into_iter().collect()));
+                .map(|displayed| displayed.into_iter().collect()),
-        let attributes_for_faceting = source.attributes_for_faceting.map(|opt| {
+            searchable_attributes: option_to_setting(source.searchable_attributes),
-            opt.map(|attributes_for_faceting| attributes_for_faceting.into_iter().collect())
+            filterable_attributes: option_to_setting(source.attributes_for_faceting.clone())
-        });
+                .map(|filterable| filterable.into_iter().collect()),
-        let ranking_rules = source.ranking_rules.map(|opt| {
+            sortable_attributes: option_to_setting(source.attributes_for_faceting)
-            opt.map(|ranking_rules| {
+                .map(|sortable| sortable.into_iter().collect()),
+            ranking_rules: option_to_setting(source.ranking_rules).map(|ranking_rules| {
                 ranking_rules
                     .into_iter()
                     .filter_map(|ranking_rule| {
@@ -119,26 +119,33 @@ impl From<v1::settings::Settings> for v2::Settings<v2::Unchecked> {
                                     ranking_rule.into();
                                 criterion.as_ref().map(ToString::to_string)
                             }
-                            Err(()) => Some(ranking_rule),
+                            Err(()) => {
+                                log::warn!(
+                                    "Could not import the following ranking rule: `{}`.",
+                                    ranking_rule
+                                );
+                                None
+                            }
                         }
                     })
                     .collect()
-            })
+            }),
-        });
+            stop_words: option_to_setting(source.stop_words),
-
+            synonyms: option_to_setting(source.synonyms),
-        Self {
+            distinct_attribute: option_to_setting(source.distinct_attribute),
-            displayed_attributes,
-            searchable_attributes: source.searchable_attributes,
-            filterable_attributes: attributes_for_faceting,
-            ranking_rules,
-            stop_words: source.stop_words,
-            synonyms: source.synonyms,
-            distinct_attribute: source.distinct_attribute,
             _kind: std::marker::PhantomData,
         }
     }
 }
 
+fn option_to_setting<T>(opt: Option<Option<T>>) -> v2::Setting<T> {
+    match opt {
+        Some(Some(t)) => v2::Setting::Set(t),
+        None => v2::Setting::NotSet,
+        Some(None) => v2::Setting::Reset,
+    }
+}
+
 impl From<v1::update::UpdateStatus> for Option<v2::updates::UpdateStatus> {
     fn from(source: v1::update::UpdateStatus) -> Self {
         use v1::update::UpdateStatus as UpdateStatusV1;
@@ -251,38 +258,27 @@ impl From<v1::update::UpdateType> for Option<v2::updates::UpdateMeta> {
 
 impl From<v1::settings::SettingsUpdate> for v2::Settings<v2::Unchecked> {
     fn from(source: v1::settings::SettingsUpdate) -> Self {
-        let displayed_attributes: Option<Option<BTreeSet<String>>> =
+        let ranking_rules = v2::Setting::from(source.ranking_rules);
-            source.displayed_attributes.into();
-
-        let attributes_for_faceting: Option<Option<Vec<String>>> =
-            source.attributes_for_faceting.into();
-
-        let ranking_rules: Option<Option<Vec<v1::settings::RankingRule>>> =
-            source.ranking_rules.into();
 
         // go from the concrete types of v1 (RankingRule) to the concrete type of v2 (Criterion),
         // and then back to string as this is what the settings manipulate
-        let ranking_rules = ranking_rules.map(|opt| {
+        let ranking_rules = ranking_rules.map(|ranking_rules| {
-            opt.map(|ranking_rules| {
             ranking_rules
                 .into_iter()
                 // filter out the WordsPosition ranking rule that exists in v1 but not v2
-                    .filter_map(|ranking_rule| {
+                .filter_map(|ranking_rule| Option::<v2::settings::Criterion>::from(ranking_rule))
-                        Option::<v2::settings::Criterion>::from(ranking_rule)
-                    })
                 .map(|criterion| criterion.to_string())
                 .collect()
-            })
         });
 
         Self {
-            displayed_attributes: displayed_attributes.map(|opt| {
+            displayed_attributes: v2::Setting::from(source.displayed_attributes)
-                opt.map(|displayed_attributes| displayed_attributes.into_iter().collect())
+                .map(|displayed_attributes| displayed_attributes.into_iter().collect()),
-            }),
             searchable_attributes: source.searchable_attributes.into(),
-            filterable_attributes: attributes_for_faceting.map(|opt| {
+            filterable_attributes: v2::Setting::from(source.attributes_for_faceting.clone())
-                opt.map(|attributes_for_faceting| attributes_for_faceting.into_iter().collect())
+                .map(|attributes_for_faceting| attributes_for_faceting.into_iter().collect()),
-            }),
+            sortable_attributes: v2::Setting::from(source.attributes_for_faceting)
+                .map(|attributes_for_faceting| attributes_for_faceting.into_iter().collect()),
             ranking_rules,
             stop_words: source.stop_words.into(),
             synonyms: source.synonyms.into(),
@@ -314,12 +310,12 @@ impl From<v1::settings::RankingRule> for Option<v2::settings::Criterion> {
     }
 }
 
-impl<T> From<v1::settings::UpdateState<T>> for Option<Option<T>> {
+impl<T> From<v1::settings::UpdateState<T>> for v2::Setting<T> {
     fn from(source: v1::settings::UpdateState<T>) -> Self {
         match source {
-            v1::settings::UpdateState::Update(new_value) => Some(Some(new_value)),
+            v1::settings::UpdateState::Update(new_value) => v2::Setting::Set(new_value),
-            v1::settings::UpdateState::Clear => Some(None),
+            v1::settings::UpdateState::Clear => v2::Setting::Reset,
-            v1::settings::UpdateState::Nothing => None,
+            v1::settings::UpdateState::Nothing => v2::Setting::NotSet,
         }
     }
 }

dump/src/reader/compat/v2_to_v3.rs

@@ -361,28 +361,29 @@ impl From<String> for v3::Code {
     }
 }
 
-fn option_to_setting<T>(opt: Option<Option<T>>) -> v3::Setting<T> {
+impl<A> From<v2::Setting<A>> for v3::Setting<A> {
-    match opt {
+    fn from(setting: v2::Setting<A>) -> Self {
-        Some(Some(t)) => v3::Setting::Set(t),
+        match setting {
-        None => v3::Setting::NotSet,
+            v2::settings::Setting::Set(a) => v3::settings::Setting::Set(a),
-        Some(None) => v3::Setting::Reset,
+            v2::settings::Setting::Reset => v3::settings::Setting::Reset,
+            v2::settings::Setting::NotSet => v3::settings::Setting::NotSet,
+        }
     }
 }
 
 impl<T> From<v2::Settings<T>> for v3::Settings<v3::Unchecked> {
     fn from(settings: v2::Settings<T>) -> Self {
         v3::Settings {
-            displayed_attributes: option_to_setting(settings.displayed_attributes),
+            displayed_attributes: settings.displayed_attributes.into(),
-            searchable_attributes: option_to_setting(settings.searchable_attributes),
+            searchable_attributes: settings.searchable_attributes.into(),
-            filterable_attributes: option_to_setting(settings.filterable_attributes)
+            filterable_attributes: settings.filterable_attributes.into(),
-                .map(|f| f.into_iter().collect()),
+            sortable_attributes: settings.sortable_attributes.into(),
-            sortable_attributes: v3::Setting::NotSet,
+            ranking_rules: v3::Setting::from(settings.ranking_rules).map(|criteria| {
-            ranking_rules: option_to_setting(settings.ranking_rules).map(|criteria| {
                 criteria.into_iter().map(|criterion| patch_ranking_rules(&criterion)).collect()
             }),
-            stop_words: option_to_setting(settings.stop_words),
+            stop_words: settings.stop_words.into(),
-            synonyms: option_to_setting(settings.synonyms),
+            synonyms: settings.synonyms.into(),
-            distinct_attribute: option_to_setting(settings.distinct_attribute),
+            distinct_attribute: settings.distinct_attribute.into(),
             _kind: std::marker::PhantomData,
         }
     }
@@ -394,6 +395,7 @@ fn patch_ranking_rules(ranking_rule: &str) -> String {
         Ok(v2::settings::Criterion::Typo) => String::from("typo"),
         Ok(v2::settings::Criterion::Proximity) => String::from("proximity"),
         Ok(v2::settings::Criterion::Attribute) => String::from("attribute"),
+        Ok(v2::settings::Criterion::Sort) => String::from("sort"),
         Ok(v2::settings::Criterion::Exactness) => String::from("exactness"),
         Ok(v2::settings::Criterion::Asc(name)) => format!("{name}:asc"),
         Ok(v2::settings::Criterion::Desc(name)) => format!("{name}:desc"),

dump/src/reader/mod.rs

@@ -530,6 +530,82 @@ pub(crate) mod test {
         meili_snap::snapshot_hash!(format!("{:#?}", documents), @"235016433dd04262c7f2da01d1e808ce");
     }
 
+    #[test]
+    fn import_dump_v2_from_meilisearch_v0_22_0_issue_3435() {
+        let dump = File::open("tests/assets/v2-v0.22.0.dump").unwrap();
+        let mut dump = DumpReader::open(dump).unwrap();
+
+        // top level infos
+        insta::assert_display_snapshot!(dump.date().unwrap(), @"2023-01-30 16:26:09.247261 +00:00:00");
+        assert_eq!(dump.instance_uid().unwrap(), None);
+
+        // tasks
+        let tasks = dump.tasks().unwrap().collect::<Result<Vec<_>>>().unwrap();
+        let (tasks, update_files): (Vec<_>, Vec<_>) = tasks.into_iter().unzip();
+        meili_snap::snapshot_hash!(meili_snap::json_string!(tasks), @"2db37756d8af1fb7623436b76e8956a6");
+        assert_eq!(update_files.len(), 8);
+        assert!(update_files[0..].iter().all(|u| u.is_none())); // everything already processed
+
+        // keys
+        let keys = dump.keys().unwrap().collect::<Result<Vec<_>>>().unwrap();
+        meili_snap::snapshot_hash!(meili_snap::json_string!(keys), @"d751713988987e9331980363e24189ce");
+
+        // indexes
+        let mut indexes = dump.indexes().unwrap().collect::<Result<Vec<_>>>().unwrap();
+        // the index are not ordered in any way by default
+        indexes.sort_by_key(|index| index.metadata().uid.to_string());
+
+        let mut products = indexes.pop().unwrap();
+        let mut movies = indexes.pop().unwrap();
+        let mut spells = indexes.pop().unwrap();
+        assert!(indexes.is_empty());
+
+        // products
+        insta::assert_json_snapshot!(products.metadata(), { ".createdAt" => "[now]", ".updatedAt" => "[now]" }, @r###"
+        {
+          "uid": "products",
+          "primaryKey": "sku",
+          "createdAt": "[now]",
+          "updatedAt": "[now]"
+        }
+        "###);
+
+        insta::assert_json_snapshot!(products.settings().unwrap());
+        let documents = products.documents().unwrap().collect::<Result<Vec<_>>>().unwrap();
+        assert_eq!(documents.len(), 10);
+        meili_snap::snapshot_hash!(format!("{:#?}", documents), @"548284a84de510f71e88e6cdea495cf5");
+
+        // movies
+        insta::assert_json_snapshot!(movies.metadata(), { ".createdAt" => "[now]", ".updatedAt" => "[now]" }, @r###"
+        {
+          "uid": "movies",
+          "primaryKey": "id",
+          "createdAt": "[now]",
+          "updatedAt": "[now]"
+        }
+        "###);
+
+        insta::assert_json_snapshot!(movies.settings().unwrap());
+        let documents = movies.documents().unwrap().collect::<Result<Vec<_>>>().unwrap();
+        assert_eq!(documents.len(), 10);
+        meili_snap::snapshot_hash!(format!("{:#?}", documents), @"0227598af846e574139ee0b80e03a720");
+
+        // spells
+        insta::assert_json_snapshot!(spells.metadata(), { ".createdAt" => "[now]", ".updatedAt" => "[now]" }, @r###"
+        {
+          "uid": "dnd_spells",
+          "primaryKey": "index",
+          "createdAt": "[now]",
+          "updatedAt": "[now]"
+        }
+        "###);
+
+        insta::assert_json_snapshot!(spells.settings().unwrap());
+        let documents = spells.documents().unwrap().collect::<Result<Vec<_>>>().unwrap();
+        assert_eq!(documents.len(), 10);
+        meili_snap::snapshot_hash!(format!("{:#?}", documents), @"235016433dd04262c7f2da01d1e808ce");
+    }
+
     #[test]
     fn import_dump_v1() {
         let dump = File::open("tests/assets/v1.dump").unwrap();
@@ -542,7 +618,7 @@ pub(crate) mod test {
         // tasks
         let tasks = dump.tasks().unwrap().collect::<Result<Vec<_>>>().unwrap();
         let (tasks, update_files): (Vec<_>, Vec<_>) = tasks.into_iter().unzip();
-        meili_snap::snapshot_hash!(meili_snap::json_string!(tasks), @"b3e3652bfc10a76670be157d2507d761");
+        meili_snap::snapshot_hash!(meili_snap::json_string!(tasks), @"8df6eab075a44b3c1af6b726f9fd9a43");
         assert_eq!(update_files.len(), 9);
         assert!(update_files[..].iter().all(|u| u.is_none())); // no update file in dump v1
 

dump/src/reader/snapshots/dump__reader__test__import_dump_v1-11.snap

@@ -10,6 +10,7 @@ expression: spells.settings().unwrap()
     "*"
   ],
   "filterableAttributes": [],
+  "sortableAttributes": [],
   "rankingRules": [
     "typo",
     "words",

dump/src/reader/snapshots/dump__reader__test__import_dump_v1-5.snap

@@ -10,6 +10,7 @@ expression: products.settings().unwrap()
     "*"
   ],
   "filterableAttributes": [],
+  "sortableAttributes": [],
   "rankingRules": [
     "typo",
     "words",

dump/src/reader/snapshots/dump__reader__test__import_dump_v1-8.snap

@@ -13,6 +13,10 @@ expression: movies.settings().unwrap()
     "genres",
     "id"
   ],
+  "sortableAttributes": [
+    "genres",
+    "id"
+  ],
   "rankingRules": [
     "typo",
     "words",

dump/src/reader/snapshots/dump__reader__test__import_dump_v2_from_meilisearch_v0_22_0_issue_3435-11.snap

@@ -0,0 +1,25 @@
+---
+source: dump/src/reader/mod.rs
+expression: spells.settings().unwrap()
+---
+{
+  "displayedAttributes": [
+    "*"
+  ],
+  "searchableAttributes": [
+    "*"
+  ],
+  "filterableAttributes": [],
+  "sortableAttributes": [],
+  "rankingRules": [
+    "words",
+    "typo",
+    "proximity",
+    "attribute",
+    "sort",
+    "exactness"
+  ],
+  "stopWords": [],
+  "synonyms": {},
+  "distinctAttribute": null
+}

dump/src/reader/snapshots/dump__reader__test__import_dump_v2_from_meilisearch_v0_22_0_issue_3435-5.snap

@@ -0,0 +1,39 @@
+---
+source: dump/src/reader/mod.rs
+expression: products.settings().unwrap()
+---
+{
+  "displayedAttributes": [
+    "*"
+  ],
+  "searchableAttributes": [
+    "*"
+  ],
+  "filterableAttributes": [],
+  "sortableAttributes": [],
+  "rankingRules": [
+    "words",
+    "typo",
+    "proximity",
+    "attribute",
+    "sort",
+    "exactness"
+  ],
+  "stopWords": [],
+  "synonyms": {
+    "android": [
+      "phone",
+      "smartphone"
+    ],
+    "iphone": [
+      "phone",
+      "smartphone"
+    ],
+    "phone": [
+      "android",
+      "iphone",
+      "smartphone"
+    ]
+  },
+  "distinctAttribute": null
+}

dump/src/reader/snapshots/dump__reader__test__import_dump_v2_from_meilisearch_v0_22_0_issue_3435-8.snap

@@ -0,0 +1,30 @@
+---
+source: dump/src/reader/mod.rs
+expression: movies.settings().unwrap()
+---
+{
+  "displayedAttributes": [
+    "*"
+  ],
+  "searchableAttributes": [
+    "*"
+  ],
+  "filterableAttributes": [
+    "genres",
+    "id"
+  ],
+  "sortableAttributes": [
+    "release_date"
+  ],
+  "rankingRules": [
+    "words",
+    "typo",
+    "proximity",
+    "attribute",
+    "exactness",
+    "release_date:asc"
+  ],
+  "stopWords": [],
+  "synonyms": {},
+  "distinctAttribute": null
+}

dump/src/reader/v2/mod.rs

@@ -41,6 +41,7 @@ use super::Document;
 use crate::{IndexMetadata, Result, Version};
 
 pub type Settings<T> = settings::Settings<T>;
+pub type Setting<T> = settings::Setting<T>;
 pub type Checked = settings::Checked;
 pub type Unchecked = settings::Unchecked;
 
@@ -306,4 +307,81 @@ pub(crate) mod test {
         assert_eq!(documents.len(), 10);
         meili_snap::snapshot_hash!(format!("{:#?}", documents), @"235016433dd04262c7f2da01d1e808ce");
     }
+
+    #[test]
+    fn read_dump_v2_from_meilisearch_v0_22_0_issue_3435() {
+        let dump = File::open("tests/assets/v2-v0.22.0.dump").unwrap();
+        let dir = TempDir::new().unwrap();
+        let mut dump = BufReader::new(dump);
+        let gz = GzDecoder::new(&mut dump);
+        let mut archive = tar::Archive::new(gz);
+        archive.unpack(dir.path()).unwrap();
+
+        let mut dump = V2Reader::open(dir).unwrap();
+
+        // top level infos
+        insta::assert_display_snapshot!(dump.date().unwrap(), @"2023-01-30 16:26:09.247261 +00:00:00");
+
+        // tasks
+        let tasks = dump.tasks().collect::<Result<Vec<_>>>().unwrap();
+        let (tasks, update_files): (Vec<_>, Vec<_>) = tasks.into_iter().unzip();
+        meili_snap::snapshot_hash!(meili_snap::json_string!(tasks), @"aca8ba13046272664eb3ea2da3031633");
+        assert_eq!(update_files.len(), 8);
+        assert!(update_files[0..].iter().all(|u| u.is_none())); // everything has already been processed
+
+        // indexes
+        let mut indexes = dump.indexes().unwrap().collect::<Result<Vec<_>>>().unwrap();
+        // the index are not ordered in any way by default
+        indexes.sort_by_key(|index| index.metadata().uid.to_string());
+
+        let mut products = indexes.pop().unwrap();
+        let mut movies = indexes.pop().unwrap();
+        let mut spells = indexes.pop().unwrap();
+        assert!(indexes.is_empty());
+
+        // products
+        insta::assert_json_snapshot!(products.metadata(), { ".createdAt" => "[now]", ".updatedAt" => "[now]" }, @r###"
+        {
+          "uid": "products",
+          "primaryKey": "sku",
+          "createdAt": "[now]",
+          "updatedAt": "[now]"
+        }
+        "###);
+
+        insta::assert_json_snapshot!(products.settings().unwrap());
+        let documents = products.documents().unwrap().collect::<Result<Vec<_>>>().unwrap();
+        assert_eq!(documents.len(), 10);
+        meili_snap::snapshot_hash!(format!("{:#?}", documents), @"548284a84de510f71e88e6cdea495cf5");
+
+        // movies
+        insta::assert_json_snapshot!(movies.metadata(), { ".createdAt" => "[now]", ".updatedAt" => "[now]" }, @r###"
+        {
+          "uid": "movies",
+          "primaryKey": "id",
+          "createdAt": "[now]",
+          "updatedAt": "[now]"
+        }
+        "###);
+
+        insta::assert_json_snapshot!(movies.settings().unwrap());
+        let documents = movies.documents().unwrap().collect::<Result<Vec<_>>>().unwrap();
+        assert_eq!(documents.len(), 10);
+        meili_snap::snapshot_hash!(format!("{:#?}", documents), @"0227598af846e574139ee0b80e03a720");
+
+        // spells
+        insta::assert_json_snapshot!(spells.metadata(), { ".createdAt" => "[now]", ".updatedAt" => "[now]" }, @r###"
+        {
+          "uid": "dnd_spells",
+          "primaryKey": "index",
+          "createdAt": "[now]",
+          "updatedAt": "[now]"
+        }
+        "###);
+
+        insta::assert_json_snapshot!(spells.settings().unwrap());
+        let documents = spells.documents().unwrap().collect::<Result<Vec<_>>>().unwrap();
+        assert_eq!(documents.len(), 10);
+        meili_snap::snapshot_hash!(format!("{:#?}", documents), @"235016433dd04262c7f2da01d1e808ce");
+    }
 }

dump/src/reader/v2/settings.rs

@@ -1,35 +1,33 @@
 use std::collections::{BTreeMap, BTreeSet};
-use std::fmt::Display;
+use std::fmt;
 use std::marker::PhantomData;
 use std::str::FromStr;
 
-use once_cell::sync::Lazy;
-use regex::Regex;
 use serde::{Deserialize, Deserializer};
 
 #[cfg(test)]
 fn serialize_with_wildcard<S>(
-    field: &Option<Option<Vec<String>>>,
+    field: &Setting<Vec<String>>,
     s: S,
 ) -> std::result::Result<S::Ok, S::Error>
 where
     S: serde::Serializer,
 {
-    let wildcard = vec!["*".to_string()];
+    use serde::Serialize;
-    s.serialize_some(&field.as_ref().map(|o| o.as_ref().unwrap_or(&wildcard)))
-}
 
-fn deserialize_some<'de, T, D>(deserializer: D) -> std::result::Result<Option<T>, D::Error>
+    let wildcard = vec!["*".to_string()];
-where
+    match field {
-    T: Deserialize<'de>,
+        Setting::Set(value) => Some(value),
-    D: Deserializer<'de>,
+        Setting::Reset => Some(&wildcard),
-{
+        Setting::NotSet => None,
-    Deserialize::deserialize(deserializer).map(Some)
+    }
+    .serialize(s)
 }
 
 #[derive(Clone, Default, Debug)]
 #[cfg_attr(test, derive(serde::Serialize))]
 pub struct Checked;
+
 #[derive(Clone, Default, Debug, Deserialize)]
 #[cfg_attr(test, derive(serde::Serialize))]
 pub struct Unchecked;
@@ -42,75 +40,54 @@ pub struct Unchecked;
 pub struct Settings<T> {
     #[serde(
         default,
-        deserialize_with = "deserialize_some",
         serialize_with = "serialize_with_wildcard",
-        skip_serializing_if = "Option::is_none"
+        skip_serializing_if = "Setting::is_not_set"
     )]
-    pub displayed_attributes: Option<Option<Vec<String>>>,
+    pub displayed_attributes: Setting<Vec<String>>,
 
     #[serde(
         default,
-        deserialize_with = "deserialize_some",
         serialize_with = "serialize_with_wildcard",
-        skip_serializing_if = "Option::is_none"
+        skip_serializing_if = "Setting::is_not_set"
     )]
-    pub searchable_attributes: Option<Option<Vec<String>>>,
+    pub searchable_attributes: Setting<Vec<String>>,
 
-    #[serde(
+    #[serde(default, skip_serializing_if = "Setting::is_not_set")]
-        default,
+    pub filterable_attributes: Setting<BTreeSet<String>>,
-        deserialize_with = "deserialize_some",
+    #[serde(default, skip_serializing_if = "Setting::is_not_set")]
-        skip_serializing_if = "Option::is_none"
+    pub sortable_attributes: Setting<BTreeSet<String>>,
-    )]
+    #[serde(default, skip_serializing_if = "Setting::is_not_set")]
-    pub filterable_attributes: Option<Option<BTreeSet<String>>>,
+    pub ranking_rules: Setting<Vec<String>>,
-
+    #[serde(default, skip_serializing_if = "Setting::is_not_set")]
-    #[serde(
+    pub stop_words: Setting<BTreeSet<String>>,
-        default,
+    #[serde(default, skip_serializing_if = "Setting::is_not_set")]
-        deserialize_with = "deserialize_some",
+    pub synonyms: Setting<BTreeMap<String, Vec<String>>>,
-        skip_serializing_if = "Option::is_none"
+    #[serde(default, skip_serializing_if = "Setting::is_not_set")]
-    )]
+    pub distinct_attribute: Setting<String>,
-    pub ranking_rules: Option<Option<Vec<String>>>,
-    #[serde(
-        default,
-        deserialize_with = "deserialize_some",
-        skip_serializing_if = "Option::is_none"
-    )]
-    pub stop_words: Option<Option<BTreeSet<String>>>,
-    #[serde(
-        default,
-        deserialize_with = "deserialize_some",
-        skip_serializing_if = "Option::is_none"
-    )]
-    pub synonyms: Option<Option<BTreeMap<String, Vec<String>>>>,
-    #[serde(
-        default,
-        deserialize_with = "deserialize_some",
-        skip_serializing_if = "Option::is_none"
-    )]
-    pub distinct_attribute: Option<Option<String>>,
 
     #[serde(skip)]
     pub _kind: PhantomData<T>,
 }
 
 impl Settings<Unchecked> {
-    pub fn check(mut self) -> Settings<Checked> {
+    pub fn check(self) -> Settings<Checked> {
-        let displayed_attributes = match self.displayed_attributes.take() {
+        let displayed_attributes = match self.displayed_attributes {
-            Some(Some(fields)) => {
+            Setting::Set(fields) => {
                 if fields.iter().any(|f| f == "*") {
-                    Some(None)
+                    Setting::Reset
                 } else {
-                    Some(Some(fields))
+                    Setting::Set(fields)
                 }
             }
             otherwise => otherwise,
         };
 
-        let searchable_attributes = match self.searchable_attributes.take() {
+        let searchable_attributes = match self.searchable_attributes {
-            Some(Some(fields)) => {
+            Setting::Set(fields) => {
                 if fields.iter().any(|f| f == "*") {
-                    Some(None)
+                    Setting::Reset
                 } else {
-                    Some(Some(fields))
+                    Setting::Set(fields)
                 }
             }
             otherwise => otherwise,
@@ -120,6 +97,7 @@ impl Settings<Unchecked> {
             displayed_attributes,
             searchable_attributes,
             filterable_attributes: self.filterable_attributes,
+            sortable_attributes: self.sortable_attributes,
             ranking_rules: self.ranking_rules,
             stop_words: self.stop_words,
             synonyms: self.synonyms,
@@ -129,10 +107,61 @@ impl Settings<Unchecked> {
     }
 }
 
-static ASC_DESC_REGEX: Lazy<Regex> =
+#[derive(Debug, Clone, PartialEq)]
-    Lazy::new(|| Regex::new(r#"(asc|desc)\(([\w_-]+)\)"#).unwrap());
+pub enum Setting<T> {
+    Set(T),
+    Reset,
+    NotSet,
+}
 
-#[derive(Debug, Deserialize, Clone, PartialEq, Eq)]
+impl<T> Default for Setting<T> {
+    fn default() -> Self {
+        Self::NotSet
+    }
+}
+
+impl<T> Setting<T> {
+    pub const fn is_not_set(&self) -> bool {
+        matches!(self, Self::NotSet)
+    }
+
+    pub fn map<A>(self, f: fn(T) -> A) -> Setting<A> {
+        match self {
+            Setting::Set(a) => Setting::Set(f(a)),
+            Setting::Reset => Setting::Reset,
+            Setting::NotSet => Setting::NotSet,
+        }
+    }
+}
+
+#[cfg(test)]
+impl<T: serde::Serialize> serde::Serialize for Setting<T> {
+    fn serialize<S>(&self, serializer: S) -> std::result::Result<S::Ok, S::Error>
+    where
+        S: serde::Serializer,
+    {
+        match self {
+            Self::Set(value) => Some(value),
+            // Usually not_set isn't serialized by setting skip_serializing_if field attribute
+            Self::NotSet | Self::Reset => None,
+        }
+        .serialize(serializer)
+    }
+}
+
+impl<'de, T: Deserialize<'de>> Deserialize<'de> for Setting<T> {
+    fn deserialize<D>(deserializer: D) -> std::result::Result<Self, D::Error>
+    where
+        D: Deserializer<'de>,
+    {
+        Deserialize::deserialize(deserializer).map(|x| match x {
+            Some(x) => Self::Set(x),
+            None => Self::Reset, // Reset is forced by sending null value
+        })
+    }
+}
+
+#[derive(Debug, Clone, PartialEq, Eq)]
 pub enum Criterion {
     /// Sorted by decreasing number of matched query terms.
     /// Query words at the front of an attribute is considered better than if it was at the back.
@@ -142,8 +171,11 @@ pub enum Criterion {
     /// Sorted by increasing distance between matched query terms.
     Proximity,
     /// Documents with quey words contained in more important
-    /// attributes are considred better.
+    /// attributes are considered better.
     Attribute,
+    /// Dynamically sort at query time the documents. None, one or multiple Asc/Desc sortable
+    /// attributes can be used in place of this criterion at query time.
+    Sort,
     /// Sorted by the similarity of the matched words with the query words.
     Exactness,
     /// Sorted by the increasing value of the field specified.
@@ -152,40 +184,86 @@ pub enum Criterion {
     Desc(String),
 }
 
+impl Criterion {
+    /// Returns the field name parameter of this criterion.
+    pub fn field_name(&self) -> Option<&str> {
+        match self {
+            Criterion::Asc(name) | Criterion::Desc(name) => Some(name),
+            _otherwise => None,
+        }
+    }
+}
+
 impl FromStr for Criterion {
+    // since we're not going to show the custom error message we can override the
+    // error type.
     type Err = ();
 
-    fn from_str(txt: &str) -> Result<Criterion, Self::Err> {
+    fn from_str(text: &str) -> Result<Criterion, Self::Err> {
-        match txt {
+        match text {
             "words" => Ok(Criterion::Words),
             "typo" => Ok(Criterion::Typo),
             "proximity" => Ok(Criterion::Proximity),
             "attribute" => Ok(Criterion::Attribute),
+            "sort" => Ok(Criterion::Sort),
             "exactness" => Ok(Criterion::Exactness),
-            text => {
+            text => match AscDesc::from_str(text) {
-                let caps = ASC_DESC_REGEX.captures(text).ok_or(())?;
+                Ok(AscDesc::Asc(field)) => Ok(Criterion::Asc(field)),
-                let order = caps.get(1).unwrap().as_str();
+                Ok(AscDesc::Desc(field)) => Ok(Criterion::Desc(field)),
-                let field_name = caps.get(2).unwrap().as_str();
+                Err(_) => Err(()),
-                match order {
+            },
-                    "asc" => Ok(Criterion::Asc(field_name.to_string())),
-                    "desc" => Ok(Criterion::Desc(field_name.to_string())),
-                    _text => Err(()),
-                }
-            }
         }
     }
 }
 
-impl Display for Criterion {
+#[derive(Debug, Deserialize, Clone, PartialEq, Eq)]
-    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+pub enum AscDesc {
-        match self {
+    Asc(String),
-            Criterion::Words => write!(f, "words"),
+    Desc(String),
-            Criterion::Typo => write!(f, "typo"),
+}
-            Criterion::Proximity => write!(f, "proximity"),
+
-            Criterion::Attribute => write!(f, "attribute"),
+impl FromStr for AscDesc {
-            Criterion::Exactness => write!(f, "exactness"),
+    type Err = ();
-            Criterion::Asc(field_name) => write!(f, "asc({})", field_name),
+
-            Criterion::Desc(field_name) => write!(f, "desc({})", field_name),
+    // since we don't know if this comes from the old or new syntax we need to check
+    // for both syntax.
+    // WARN: this code doesn't come from the original meilisearch v0.22.0 but was
+    // written specifically to be able to import the dump of meilisearch v0.21.0 AND
+    // meilisearch v0.22.0.
+    fn from_str(text: &str) -> Result<AscDesc, Self::Err> {
+        if let Some((field_name, asc_desc)) = text.rsplit_once(':') {
+            match asc_desc {
+                "asc" => Ok(AscDesc::Asc(field_name.to_string())),
+                "desc" => Ok(AscDesc::Desc(field_name.to_string())),
+                _ => Err(()),
+            }
+        } else if text.starts_with("asc(") && text.ends_with(")") {
+            Ok(AscDesc::Asc(
+                text.strip_prefix("asc(").unwrap().strip_suffix(")").unwrap().to_string(),
+            ))
+        } else if text.starts_with("desc(") && text.ends_with(")") {
+            Ok(AscDesc::Desc(
+                text.strip_prefix("desc(").unwrap().strip_suffix(")").unwrap().to_string(),
+            ))
+        } else {
+            Err(())
+        }
+    }
+}
+
+impl fmt::Display for Criterion {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        use Criterion::*;
+
+        match self {
+            Words => f.write_str("words"),
+            Typo => f.write_str("typo"),
+            Proximity => f.write_str("proximity"),
+            Attribute => f.write_str("attribute"),
+            Sort => f.write_str("sort"),
+            Exactness => f.write_str("exactness"),
+            Asc(attr) => write!(f, "{}:asc", attr),
+            Desc(attr) => write!(f, "{}:desc", attr),
         }
     }
 }

dump/src/reader/v2/snapshots/dump__reader__v2__test__read_dump_v2_from_meilisearch_v0_22_0_issue_3435-10.snap

@@ -0,0 +1,25 @@
+---
+source: dump/src/reader/v2/mod.rs
+expression: spells.settings().unwrap()
+---
+{
+  "displayedAttributes": [
+    "*"
+  ],
+  "searchableAttributes": [
+    "*"
+  ],
+  "filterableAttributes": [],
+  "sortableAttributes": [],
+  "rankingRules": [
+    "words",
+    "typo",
+    "proximity",
+    "attribute",
+    "sort",
+    "exactness"
+  ],
+  "stopWords": [],
+  "synonyms": {},
+  "distinctAttribute": null
+}

dump/src/reader/v2/snapshots/dump__reader__v2__test__read_dump_v2_from_meilisearch_v0_22_0_issue_3435-4.snap

@@ -0,0 +1,39 @@
+---
+source: dump/src/reader/v2/mod.rs
+expression: products.settings().unwrap()
+---
+{
+  "displayedAttributes": [
+    "*"
+  ],
+  "searchableAttributes": [
+    "*"
+  ],
+  "filterableAttributes": [],
+  "sortableAttributes": [],
+  "rankingRules": [
+    "words",
+    "typo",
+    "proximity",
+    "attribute",
+    "sort",
+    "exactness"
+  ],
+  "stopWords": [],
+  "synonyms": {
+    "android": [
+      "phone",
+      "smartphone"
+    ],
+    "iphone": [
+      "phone",
+      "smartphone"
+    ],
+    "phone": [
+      "android",
+      "iphone",
+      "smartphone"
+    ]
+  },
+  "distinctAttribute": null
+}

dump/src/reader/v2/snapshots/dump__reader__v2__test__read_dump_v2_from_meilisearch_v0_22_0_issue_3435-7.snap

@@ -0,0 +1,30 @@
+---
+source: dump/src/reader/v2/mod.rs
+expression: movies.settings().unwrap()
+---
+{
+  "displayedAttributes": [
+    "*"
+  ],
+  "searchableAttributes": [
+    "*"
+  ],
+  "filterableAttributes": [
+    "genres",
+    "id"
+  ],
+  "sortableAttributes": [
+    "release_date"
+  ],
+  "rankingRules": [
+    "words",
+    "typo",
+    "proximity",
+    "attribute",
+    "exactness",
+    "release_date:asc"
+  ],
+  "stopWords": [],
+  "synonyms": {},
+  "distinctAttribute": null
+}

meilisearch/tests/dumps/mod.rs

@@ -98,14 +98,14 @@ async fn import_dump_v1_movie_with_settings() {
     assert_eq!(code, 200);
     assert_eq!(
         settings,
-        json!({ "displayedAttributes": ["genres", "id", "overview", "poster", "release_date", "title"], "searchableAttributes": ["title", "overview"], "filterableAttributes": ["genres"], "sortableAttributes": [], "rankingRules": ["typo", "words", "proximity", "attribute", "exactness"], "stopWords": ["of", "the"], "synonyms": {}, "distinctAttribute": null, "typoTolerance": {"enabled": true, "minWordSizeForTypos": { "oneTypo": 5, "twoTypos": 9 }, "disableOnWords": [], "disableOnAttributes": [] }, "faceting": { "maxValuesPerFacet": 100 }, "pagination": { "maxTotalHits": 1000 } })
+        json!({ "displayedAttributes": ["genres", "id", "overview", "poster", "release_date", "title"], "searchableAttributes": ["title", "overview"], "filterableAttributes": ["genres"], "sortableAttributes": ["genres"], "rankingRules": ["typo", "words", "proximity", "attribute", "exactness"], "stopWords": ["of", "the"], "synonyms": {}, "distinctAttribute": null, "typoTolerance": {"enabled": true, "minWordSizeForTypos": { "oneTypo": 5, "twoTypos": 9 }, "disableOnWords": [], "disableOnAttributes": [] }, "faceting": { "maxValuesPerFacet": 100 }, "pagination": { "maxTotalHits": 1000 } })
     );
 
     let (tasks, code) = index.list_tasks().await;
     assert_eq!(code, 200);
     assert_eq!(
         tasks,
-        json!({ "results": [{ "uid": 1, "indexUid": "indexUID", "status": "succeeded", "type": "settingsUpdate", "canceledBy": null, "details": { "displayedAttributes": ["genres", "id", "overview", "poster", "release_date", "title"], "searchableAttributes": ["title", "overview"], "filterableAttributes": ["genres"], "stopWords": ["of", "the"] }, "error": null, "duration": "PT7.288826907S", "enqueuedAt": "2021-09-08T09:34:40.882977Z", "startedAt": "2021-09-08T09:34:40.883073093Z", "finishedAt": "2021-09-08T09:34:48.1719Z"}, { "uid": 0, "indexUid": "indexUID", "status": "succeeded", "type": "documentAdditionOrUpdate", "canceledBy": null, "details": { "receivedDocuments": 0, "indexedDocuments": 31968 }, "error": null, "duration": "PT9.090735774S", "enqueuedAt": "2021-09-08T09:34:16.036101Z", "startedAt": "2021-09-08T09:34:16.261191226Z", "finishedAt": "2021-09-08T09:34:25.351927Z" }], "limit": 20, "from": 1, "next": null })
+        json!({ "results": [{ "uid": 1, "indexUid": "indexUID", "status": "succeeded", "type": "settingsUpdate", "canceledBy": null, "details": { "displayedAttributes": ["genres", "id", "overview", "poster", "release_date", "title"], "searchableAttributes": ["title", "overview"], "filterableAttributes": ["genres"], "sortableAttributes": ["genres"], "stopWords": ["of", "the"] }, "error": null, "duration": "PT7.288826907S", "enqueuedAt": "2021-09-08T09:34:40.882977Z", "startedAt": "2021-09-08T09:34:40.883073093Z", "finishedAt": "2021-09-08T09:34:48.1719Z"}, { "uid": 0, "indexUid": "indexUID", "status": "succeeded", "type": "documentAdditionOrUpdate", "canceledBy": null, "details": { "receivedDocuments": 0, "indexedDocuments": 31968 }, "error": null, "duration": "PT9.090735774S", "enqueuedAt": "2021-09-08T09:34:16.036101Z", "startedAt": "2021-09-08T09:34:16.261191226Z", "finishedAt": "2021-09-08T09:34:25.351927Z" }], "limit": 20, "from": 1, "next": null })
     );
 
     // finally we're just going to check that we can still get a few documents by id
@@ -161,7 +161,7 @@ async fn import_dump_v1_rubygems_with_settings() {
     assert_eq!(code, 200);
     assert_eq!(
         settings,
-        json!({"displayedAttributes": ["description", "id", "name", "summary", "total_downloads", "version"], "searchableAttributes": ["name", "summary"], "filterableAttributes": ["version"], "sortableAttributes": [], "rankingRules": ["typo", "words", "fame:desc", "proximity", "attribute", "exactness", "total_downloads:desc"], "stopWords": [], "synonyms": {}, "distinctAttribute": null, "typoTolerance": {"enabled": true, "minWordSizeForTypos": {"oneTypo": 5, "twoTypos": 9}, "disableOnWords": [], "disableOnAttributes": [] }, "faceting": { "maxValuesPerFacet": 100 }, "pagination": { "maxTotalHits": 1000 }})
+        json!({"displayedAttributes": ["description", "id", "name", "summary", "total_downloads", "version"], "searchableAttributes": ["name", "summary"], "filterableAttributes": ["version"], "sortableAttributes": ["version"], "rankingRules": ["typo", "words", "fame:desc", "proximity", "attribute", "exactness", "total_downloads:desc"], "stopWords": [], "synonyms": {}, "distinctAttribute": null, "typoTolerance": {"enabled": true, "minWordSizeForTypos": {"oneTypo": 5, "twoTypos": 9}, "disableOnWords": [], "disableOnAttributes": [] }, "faceting": { "maxValuesPerFacet": 100 }, "pagination": { "maxTotalHits": 1000 }})
     );
 
     let (tasks, code) = index.list_tasks().await;