From 15646c258bb80476d67158cc790dc4a6ea35103b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Cl=C3=A9ment=20Renault?= <renault.cle@gmail.com>
Date: Sat, 22 Jun 2019 11:22:21 +0200
Subject: [PATCH] fix: Prefer using a reliable SipHash to compute document ids

---
 meilidb-data/Cargo.toml                       | 5 +++--
 meilidb-data/src/serde/extract_document_id.rs | 7 +++----
 2 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/meilidb-data/Cargo.toml b/meilidb-data/Cargo.toml
index 414cec7c7..d50605ef7 100644
--- a/meilidb-data/Cargo.toml
+++ b/meilidb-data/Cargo.toml
@@ -10,12 +10,13 @@ bincode = "1.1.2"
 deunicode = "1.0.0"
 hashbrown = { version = "0.2.2", features = ["serde"] }
 meilidb-core = { path = "../meilidb-core", version = "0.1.0" }
-meilidb-tokenizer = { path = "../meilidb-tokenizer", version = "0.1.0" }
 meilidb-schema = { path = "../meilidb-schema", version = "0.1.0" }
+meilidb-tokenizer = { path = "../meilidb-tokenizer", version = "0.1.0" }
 ordered-float = { version = "1.0.2", features = ["serde"] }
+rocksdb = { version = "0.12.2", default-features = false }
 sdset = "0.3.2"
 serde = { version = "1.0.91", features = ["derive"] }
-rocksdb = { version = "0.12.2", default-features = false }
+siphasher = "0.3.0"
 zerocopy = "0.2.2"
 
 [dependencies.rmp-serde]
diff --git a/meilidb-data/src/serde/extract_document_id.rs b/meilidb-data/src/serde/extract_document_id.rs
index a67ee1441..990094104 100644
--- a/meilidb-data/src/serde/extract_document_id.rs
+++ b/meilidb-data/src/serde/extract_document_id.rs
@@ -1,9 +1,8 @@
-use std::collections::hash_map::DefaultHasher;
 use std::hash::{Hash, Hasher};
 
 use meilidb_core::DocumentId;
-use serde::Serialize;
-use serde::ser;
+use serde::{ser, Serialize};
+use siphasher::sip::SipHasher;
 
 use super::{SerializerError, ConvertToString};
 
@@ -18,7 +17,7 @@ where D: serde::Serialize,
 }
 
 fn calculate_hash<T: Hash>(t: &T) -> u64 {
-    let mut s = DefaultHasher::new();
+    let mut s = SipHasher::new();
     t.hash(&mut s);
     s.finish()
 }