Fix partition implementation.

src/dodb.cr

@@ -336,8 +336,7 @@ class DODB::DataBase(V) < DODB::Storage(V)
 
 		begin
 			::File.delete file_path key
-		rescue
-			# FIXME: Only intercept “no such file" errors
+		rescue File::NotFoundError
 		end
 
 		remove_indexes key, value

src/dodb/partition.cr

@@ -36,7 +36,10 @@ class DODB::Partition(V) < DODB::Indexer(V)
 
 		symlink = get_partition_symlink(partition, key)
 
+		begin
 			::File.delete symlink
+		rescue File::NotFoundError
+		end
 	end
 
 	def get(partition) : Array(V)
@@ -128,11 +131,11 @@ class DODB::CachedPartition(V) < DODB::Partition(V)
 	end
 
 	def get(partition)
-		r_value = Array(V).new
+		r_value = Array(Tuple(V, Int32)).new
 
 		if keys = @data[partition]?
 			keys.each do |data_key|
-				r_value << @storage[data_key]
+				r_value << { @storage[data_key], data_key }
 			end
 		else
 			# Get the key from the database representation on the file-system.
@@ -140,10 +143,11 @@ class DODB::CachedPartition(V) < DODB::Partition(V)
 			raise MissingEntry.new(@name, partition) unless Dir.exists? partition_directory
 
 			Dir.each_child partition_directory do |child|
-				r_value << @storage[get_key child]
+				r_value << { @storage[get_key child], get_key child }
 			end
-			@data[partition] = r_value
+
+			@data[partition] = r_value.map &.[1]
 		end
-		r_value
+		r_value.map &.[0]
 	end
 end