diff --git a/meilisearch-core/benches/search_benchmark.rs b/meilisearch-core/benches/search_benchmark.rs
index e25245468..73a39780d 100644
--- a/meilisearch-core/benches/search_benchmark.rs
+++ b/meilisearch-core/benches/search_benchmark.rs
@@ -39,7 +39,7 @@ fn prepare_database(path: &Path) -> Database {
         let file = File::open(path).unwrap();
         let reader = BufReader::new(file);
         let settings: Settings = serde_json::from_reader(reader).unwrap();
-        settings.into_update().unwrap()
+        settings.to_update().unwrap()
     };
 
     db.update_write::<_, _, Box<dyn Error>>(|writer| {
diff --git a/meilisearch-core/examples/from_file.rs b/meilisearch-core/examples/from_file.rs
index af41efb6c..a64e2b626 100644
--- a/meilisearch-core/examples/from_file.rs
+++ b/meilisearch-core/examples/from_file.rs
@@ -123,7 +123,7 @@ fn index_command(command: IndexCommand, database: Database) -> Result<(), Box<dy
     let settings = {
         let string = fs::read_to_string(&command.settings)?;
         let settings: Settings = serde_json::from_str(&string).unwrap();
-        settings.into_update().unwrap()
+        settings.to_update().unwrap()
     };
 
     db.update_write(|w| index.settings_update(w, settings))?;
diff --git a/meilisearch-core/src/database.rs b/meilisearch-core/src/database.rs
index 79a1e430c..71273f803 100644
--- a/meilisearch-core/src/database.rs
+++ b/meilisearch-core/src/database.rs
@@ -82,8 +82,7 @@ fn update_awaiter(
     update_fn: Arc<ArcSwapFn>,
     index: Index,
 ) -> MResult<()> {
-    let mut receiver = receiver.into_iter();
-    while let Some(event) = receiver.next() {
+    for event in receiver {
 
         // if we receive a *MustClear* event, clear the index and break the loop
         if let UpdateEvent::MustClear = event {
@@ -547,7 +546,7 @@ mod tests {
                 }
             "#;
             let settings: Settings = serde_json::from_str(data).unwrap();
-            settings.into_update().unwrap()
+            settings.to_update().unwrap()
         };
 
         let mut update_writer = db.update_write_txn().unwrap();
@@ -610,7 +609,7 @@ mod tests {
                 }
             "#;
             let settings: Settings = serde_json::from_str(data).unwrap();
-            settings.into_update().unwrap()
+            settings.to_update().unwrap()
         };
 
         let mut update_writer = db.update_write_txn().unwrap();
@@ -672,7 +671,7 @@ mod tests {
                 }
             "#;
             let settings: Settings = serde_json::from_str(data).unwrap();
-            settings.into_update().unwrap()
+            settings.to_update().unwrap()
         };
 
         let mut update_writer = db.update_write_txn().unwrap();
@@ -727,7 +726,7 @@ mod tests {
                 }
             "#;
             let settings: Settings = serde_json::from_str(data).unwrap();
-            settings.into_update().unwrap()
+            settings.to_update().unwrap()
         };
 
         let mut update_writer = db.update_write_txn().unwrap();
@@ -763,7 +762,7 @@ mod tests {
                 }
             "#;
             let settings: Settings = serde_json::from_str(data).unwrap();
-            settings.into_update().unwrap()
+            settings.to_update().unwrap()
         };
 
         let mut writer = db.update_write_txn().unwrap();
@@ -829,7 +828,7 @@ mod tests {
                 }
             "#;
             let settings: Settings = serde_json::from_str(data).unwrap();
-            settings.into_update().unwrap()
+            settings.to_update().unwrap()
         };
 
         let mut writer = db.update_write_txn().unwrap();
@@ -871,7 +870,7 @@ mod tests {
                 }
             "#;
             let settings: Settings = serde_json::from_str(data).unwrap();
-            settings.into_update().unwrap()
+            settings.to_update().unwrap()
         };
 
         let mut writer = db.update_write_txn().unwrap();
@@ -951,7 +950,7 @@ mod tests {
                 }
             "#;
             let settings: Settings = serde_json::from_str(data).unwrap();
-            settings.into_update().unwrap()
+            settings.to_update().unwrap()
         };
 
         let mut writer = db.update_write_txn().unwrap();
@@ -1090,7 +1089,7 @@ mod tests {
                 }
             "#;
             let settings: Settings = serde_json::from_str(data).unwrap();
-            settings.into_update().unwrap()
+            settings.to_update().unwrap()
         };
 
         let mut writer = db.update_write_txn().unwrap();
@@ -1166,7 +1165,7 @@ mod tests {
                 }
             "#;
             let settings: Settings = serde_json::from_str(data).unwrap();
-            settings.into_update().unwrap()
+            settings.to_update().unwrap()
         };
 
         let mut writer = db.update_write_txn().unwrap();
diff --git a/meilisearch-core/src/facets.rs b/meilisearch-core/src/facets.rs
index 2f632dd94..1295224b7 100644
--- a/meilisearch-core/src/facets.rs
+++ b/meilisearch-core/src/facets.rs
@@ -70,7 +70,7 @@ impl FacetFilter {
                         bad_value => return Err(FacetError::unexpected_token(&["Array", "String"], bad_value).into()),
                     }
                 }
-                return Ok(Self(filter));
+                Ok(Self(filter))
             }
             bad_value => Err(FacetError::unexpected_token(&["Array"], bad_value).into()),
         }
diff --git a/meilisearch-core/src/filters/condition.rs b/meilisearch-core/src/filters/condition.rs
index 0045e410f..d22f9d905 100644
--- a/meilisearch-core/src/filters/condition.rs
+++ b/meilisearch-core/src/filters/condition.rs
@@ -31,7 +31,7 @@ struct ConditionValue<'a> {
 
 impl<'a> ConditionValue<'a> {
     pub fn new(value: &Pair<'a, Rule>) -> Self {
-        let value = match value.as_rule() {
+        match value.as_rule() {
             Rule::string | Rule::word => {
                 let string =  value.as_str();
                 let boolean = match value.as_str() {
@@ -43,12 +43,11 @@ impl<'a> ConditionValue<'a> {
                 ConditionValue { string, boolean, number }
             },
             _ => unreachable!(),
-        };
-        value
+        }
     }
 
     pub fn as_str(&self) -> &str {
-        self.string.as_ref()
+        self.string
     }
 
     pub fn as_number(&self) -> Option<&Number> {
@@ -73,7 +72,7 @@ fn get_field_value<'a>(schema: &Schema, pair: Pair<'a, Rule>) -> Result<(FieldId
     let key = items.next().unwrap();
     let field = schema
         .id(key.as_str())
-        .ok_or::<PestError<Rule>>(PestError::new_from_span(
+        .ok_or_else(|| PestError::new_from_span(
                 ErrorVariant::CustomError {
                     message: format!(
                                  "attribute `{}` not found, available attributes are: {}",
diff --git a/meilisearch-core/src/filters/mod.rs b/meilisearch-core/src/filters/mod.rs
index cbff79f37..ea2090a09 100644
--- a/meilisearch-core/src/filters/mod.rs
+++ b/meilisearch-core/src/filters/mod.rs
@@ -26,7 +26,7 @@ pub enum Filter<'a> {
 
 impl<'a> Filter<'a> {
     pub fn parse(expr: &'a str, schema: &'a Schema) -> FilterResult<'a> {
-        let mut lexed = FilterParser::parse(Rule::prgm, expr.as_ref())?;
+        let mut lexed = FilterParser::parse(Rule::prgm, expr)?;
         Self::build(lexed.next().unwrap().into_inner(), schema)
     }
 
diff --git a/meilisearch-core/src/number.rs b/meilisearch-core/src/number.rs
index a9b2e606d..38f7ca975 100644
--- a/meilisearch-core/src/number.rs
+++ b/meilisearch-core/src/number.rs
@@ -6,7 +6,7 @@ use std::str::FromStr;
 use ordered_float::OrderedFloat;
 use serde::{Deserialize, Serialize};
 
-#[derive(Serialize, Deserialize, Debug, Copy, Clone, Hash)]
+#[derive(Serialize, Deserialize, Debug, Copy, Clone)]
 pub enum Number {
     Unsigned(u64),
     Signed(i64),
diff --git a/meilisearch-core/src/query_words_mapper.rs b/meilisearch-core/src/query_words_mapper.rs
index b9816a347..b77ef52f4 100644
--- a/meilisearch-core/src/query_words_mapper.rs
+++ b/meilisearch-core/src/query_words_mapper.rs
@@ -53,7 +53,7 @@ impl QueryWordsMapper {
         }
 
         {
-            let replacement = replacement[common_left..replacement.len() - common_right].iter().cloned().collect();
+            let replacement = replacement[common_left..replacement.len() - common_right].to_vec();
             self.mappings.insert(id + common_left, (range.clone(), replacement));
         }
 
diff --git a/meilisearch-core/src/settings.rs b/meilisearch-core/src/settings.rs
index 05e6117f0..157b88251 100644
--- a/meilisearch-core/src/settings.rs
+++ b/meilisearch-core/src/settings.rs
@@ -10,8 +10,7 @@ use self::RankingRule::*;
 pub const DEFAULT_RANKING_RULES: [RankingRule; 6] = [Typo, Words, Proximity, Attribute, WordsPosition, Exactness];
 
 static RANKING_RULE_REGEX: Lazy<regex::Regex> = Lazy::new(|| {
-    let regex = regex::Regex::new(r"(asc|desc)\(([a-zA-Z0-9-_]*)\)").unwrap();
-    regex
+    regex::Regex::new(r"(asc|desc)\(([a-zA-Z0-9-_]*)\)").unwrap()
 });
 
 #[derive(Default, Clone, Serialize, Deserialize)]
@@ -44,11 +43,11 @@ fn deserialize_some<'de, T, D>(deserializer: D) -> Result<Option<T>, D::Error>
 }
 
 impl Settings {
-    pub fn into_update(&self) -> Result<SettingsUpdate, RankingRuleConversionError> {
+    pub fn to_update(&self) -> Result<SettingsUpdate, RankingRuleConversionError> {
         let settings = self.clone();
 
         let ranking_rules = match settings.ranking_rules {
-            Some(Some(rules)) => UpdateState::Update(RankingRule::from_iter(rules.iter())?),
+            Some(Some(rules)) => UpdateState::Update(RankingRule::try_from_iter(rules.iter())?),
             Some(None) => UpdateState::Clear,
             None => UpdateState::Nothing,
         };
@@ -152,7 +151,7 @@ impl RankingRule {
         }
     }
 
-    pub fn from_iter(rules: impl IntoIterator<Item = impl AsRef<str>>) -> Result<Vec<RankingRule>, RankingRuleConversionError> {
+    pub fn try_from_iter(rules: impl IntoIterator<Item = impl AsRef<str>>) -> Result<Vec<RankingRule>, RankingRuleConversionError> {
         rules.into_iter()
             .map(|s| RankingRule::from_str(s.as_ref()))
             .collect()
diff --git a/meilisearch-core/src/store/main.rs b/meilisearch-core/src/store/main.rs
index 9d5e95425..db3c61dcf 100644
--- a/meilisearch-core/src/store/main.rs
+++ b/meilisearch-core/src/store/main.rs
@@ -287,10 +287,10 @@ impl Main {
     }
 
     pub fn distinct_attribute(&self, reader: &heed::RoTxn<MainT>) -> MResult<Option<FieldId>> {
-        if let Some(value) = self.main.get::<_, Str, OwnedType<u16>>(reader, DISTINCT_ATTRIBUTE_KEY)? {
-            return Ok(Some(FieldId(value.to_owned())))
+        match self.main.get::<_, Str, OwnedType<u16>>(reader, DISTINCT_ATTRIBUTE_KEY)? {
+            Some(value) => Ok(Some(FieldId(value.to_owned()))),
+            None => Ok(None),
         }
-        return Ok(None)
     }
 
     pub fn put_distinct_attribute(self, writer: &mut heed::RwTxn<MainT>, value: FieldId) -> MResult<()> {
diff --git a/meilisearch-error/src/lib.rs b/meilisearch-error/src/lib.rs
index 368a24b2c..a6b4cbb3a 100644
--- a/meilisearch-error/src/lib.rs
+++ b/meilisearch-error/src/lib.rs
@@ -26,6 +26,7 @@ pub trait ErrorCode: std::error::Error {
     }
 }
 
+#[allow(clippy::enum_variant_names)]
 enum ErrorType {
     InternalError,
     InvalidRequestError,
diff --git a/meilisearch-http/src/routes/setting.rs b/meilisearch-http/src/routes/setting.rs
index 299bbc757..3d22af194 100644
--- a/meilisearch-http/src/routes/setting.rs
+++ b/meilisearch-http/src/routes/setting.rs
@@ -45,7 +45,7 @@ async fn update_all(
     let update_id = data.db.update_write::<_, _, ResponseError>(|writer| {
         let settings = body
             .into_inner()
-            .into_update()
+            .to_update()
             .map_err(Error::bad_request)?;
         let update_id = index.settings_update(writer, settings)?;
         Ok(update_id)
@@ -211,7 +211,7 @@ async fn update_rules(
         ..Settings::default()
     };
 
-    let settings = settings.into_update().map_err(Error::bad_request)?;
+    let settings = settings.to_update().map_err(Error::bad_request)?;
     let update_id = data.db.update_write(|w| index.settings_update(w, settings))?;
 
     Ok(HttpResponse::Accepted().json(IndexUpdateResponse::with_id(update_id)))
@@ -282,7 +282,7 @@ async fn update_distinct(
         ..Settings::default()
     };
 
-    let settings = settings.into_update().map_err(Error::bad_request)?;
+    let settings = settings.to_update().map_err(Error::bad_request)?;
     let update_id = data.db.update_write(|w| index.settings_update(w, settings))?;
 
     Ok(HttpResponse::Accepted().json(IndexUpdateResponse::with_id(update_id)))
@@ -350,7 +350,7 @@ async fn update_searchable(
         ..Settings::default()
     };
 
-    let settings = settings.into_update().map_err(Error::bad_request)?;
+    let settings = settings.to_update().map_err(Error::bad_request)?;
 
     let update_id = data.db.update_write(|w| index.settings_update(w, settings))?;
 
@@ -421,7 +421,7 @@ async fn update_displayed(
         ..Settings::default()
     };
 
-    let settings = settings.into_update().map_err(Error::bad_request)?;
+    let settings = settings.to_update().map_err(Error::bad_request)?;
     let update_id = data.db.update_write(|w| index.settings_update(w, settings))?;
 
     Ok(HttpResponse::Accepted().json(IndexUpdateResponse::with_id(update_id)))
@@ -490,7 +490,7 @@ async fn update_accept_new_fields(
         ..Settings::default()
     };
 
-    let settings = settings.into_update().map_err(Error::bad_request)?;
+    let settings = settings.to_update().map_err(Error::bad_request)?;
     let update_id = data.db.update_write(|w| index.settings_update(w, settings))?;
 
     Ok(HttpResponse::Accepted().json(IndexUpdateResponse::with_id(update_id)))
@@ -549,7 +549,7 @@ async fn update_attributes_for_faceting(
         ..Settings::default()
     };
 
-    let settings = settings.into_update().map_err(Error::bad_request)?;
+    let settings = settings.to_update().map_err(Error::bad_request)?;
     let update_id = data.db.update_write(|w| index.settings_update(w, settings))?;
 
     Ok(HttpResponse::Accepted().json(IndexUpdateResponse::with_id(update_id)))
diff --git a/meilisearch-schema/src/schema.rs b/meilisearch-schema/src/schema.rs
index 7645ae50b..7579234dd 100644
--- a/meilisearch-schema/src/schema.rs
+++ b/meilisearch-schema/src/schema.rs
@@ -2,7 +2,7 @@ use crate::{FieldsMap, FieldId, SResult, Error, IndexedPos};
 use serde::{Serialize, Deserialize};
 use std::collections::{HashMap, HashSet};
 
-#[derive(Clone, Debug, Serialize, Deserialize)]
+#[derive(Clone, Debug, Serialize, Deserialize, Default)]
 pub struct Schema {
     fields_map: FieldsMap,
 
@@ -19,13 +19,8 @@ pub struct Schema {
 impl Schema {
     pub fn new() -> Schema {
         Schema {
-            fields_map: FieldsMap::default(),
-            primary_key: None,
-            ranked: HashSet::new(),
-            displayed: HashSet::new(),
-            indexed: Vec::new(),
-            indexed_map: HashMap::new(),
             accept_new_fields: true,
+            ..Default::default()
         }
     }