Rewrites lead to a working spec file.

src/dodb.cr

@@ -274,23 +274,17 @@ abstract class DODB::Storage(V)
 
 	private def remove_indexing!
 		@indexers.each do |indexer|
-			FileUtils.rm_rf indexer.indexing_directory
+			indexer.nuke_index
 		end
 	end
 
 	# A very slow operation that removes all indices and then rewrites
 	# them all.
-	# FIXME: Is this really useful in its current form? We should remove the
-	#        index directories, not the indices based on our current (and
-	#        possiblly different from what’s stored) data.
 	def reindex_everything!
-		old_data = to_h
-
 		remove_indexing!
-		remove_data!
 
-		old_data.each do |index, item|
-			self[index] = item
+		each_with_index() do |item, index|
+			write_partitions index, item
 		end
 	end
 

src/dodb/index.cr

@@ -169,6 +169,11 @@ class DODB::CachedIndex(V) < DODB::Index(V)
 		end
 	end
 
+	def nuke_index
+		super
+		data.clear
+	end
+
 	def index(key, value)
 		super(key, value)
 

src/dodb/indexer.cr

@@ -6,5 +6,9 @@ abstract class DODB::Indexer(V)
 	abstract def name                : String
 
 	abstract def indexing_directory : String
+
+	def nuke_index
+		FileUtils.rm_rf indexing_directory
+	end
 end
 

src/dodb/partition.cr

@@ -105,6 +105,11 @@ class DODB::CachedPartition(V) < DODB::Partition(V)
 	# This hash contains the relation between the index key and the data keys.
 	property data = Hash(String, Array(Int32)).new
 
+	def nuke_index
+		super
+		data.clear
+	end
+
 	def index(key, value)
 		super(key, value)
 		partition = key_proc.call value

src/dodb/tags.cr

@@ -157,6 +157,11 @@ class DODB::CachedTags(V) < DODB::Tags(V)
 		end
 	end
 
+	def nuke_index
+		super
+		data.clear
+	end
+
 	def get_with_indice(tag : String) : Array(Tuple(V, Int32))
 		r_value = Array(Tuple(V, Int32)).new