fix: Change the way the iterator upper bound is computed

src/database/deserializer.rs

@@ -43,7 +43,7 @@ impl<'de, 'a, 'b> de::Deserializer<'de> for &'b mut Deserializer<'a> {
     {
         let mut options = ReadOptions::new();
         let lower = DocumentKey::new(self.document_id);
-        let upper = DocumentKey::new(self.document_id + 1);
+        let upper = lower.with_attribute_max();
         options.set_iterate_lower_bound(lower.as_ref());
         options.set_iterate_upper_bound(upper.as_ref());
 

src/database/document_key.rs

@@ -38,6 +38,10 @@ impl DocumentKey {
         DocumentKeyAttr::new(self.document_id(), attr)
     }
 
+    pub fn with_attribute_max(&self) -> DocumentKeyAttr {
+        DocumentKeyAttr::new(self.document_id(), SchemaAttr::max())
+    }
+
     pub fn document_id(&self) -> DocumentId {
         (&self.0[4..]).read_u64::<NativeEndian>().unwrap()
     }

src/database/schema.rs

@@ -1,9 +1,9 @@
 use std::collections::{HashMap, BTreeMap};
 use std::io::{Read, Write};
+use std::{fmt, u32};
 use std::path::Path;
 use std::ops::BitOr;
 use std::fs::File;
-use std::fmt;
 
 use serde_derive::{Serialize, Deserialize};
 use linked_hash_map::LinkedHashMap;
@@ -127,6 +127,10 @@ impl SchemaAttr {
         SchemaAttr(value)
     }
 
+    pub fn max() -> SchemaAttr {
+        SchemaAttr(u32::MAX)
+    }
+
     pub fn as_u32(&self) -> u32 {
         self.0
     }