Fix delete functions for tags & partition.

src/dodb/partition.cr

@@ -203,11 +203,12 @@ class DODB::RAMOnlyPartition(V) < DODB::CachedPartition(V)
 	end
 
 	def delete(partition, &matcher)
-		new_partition = @data[partition].select do |key|
+		if keys = @data[partition]?
+			new_partition = keys.select do |key|
 				item = @storage[key]
 				! yield item
 			end
-
 			@data[partition] = new_partition
 		end
 	end
+end

src/dodb/tags.cr

@@ -171,6 +171,18 @@ class DODB::CachedTags(V) < DODB::Tags(V)
 
 		r_value
 	end
+
+	def delete(tag, &matcher)
+		# Use `get_with_indexes` to retrieve data on-disk, if necessary.
+		new_tag = get_with_indexes(tag).map(&.[1]).select do |key|
+			item = @storage[key]
+			! yield item
+		end
+
+		@data[tag] = new_tag
+
+		super(tag, matcher)
+	end
 end
 
 # TODO
@@ -191,7 +203,6 @@ class DODB::RAMOnlyTags(V) < DODB::CachedTags(V)
 	end
 
 	def deindex(key, value)
-		super(key, value)
 		indices = key_proc.call value
 
 		indices.each do |tag|
@@ -209,18 +220,20 @@ class DODB::RAMOnlyTags(V) < DODB::CachedTags(V)
 			keys.each do |data_key|
 				r_value << { @storage[data_key], data_key }
 			end
-		else
-			# Get the key from the database representation on the file-system.
-			tag_directory = indexing_directory tag
-			raise MissingEntry.new(@name, tag) unless Dir.exists? tag_directory
-
-			Dir.each_child tag_directory do |child|
-				r_value << { @storage[get_key child], get_key child }
-			end
-
-			@data[tag] = r_value.map &.[1]
 		end
 
 		r_value
 	end
+
+	def delete(tag, &matcher)
+		# Use `get_with_indexes` to retrieve data on-disk, if necessary.
+		if keys = @data[tag]?
+			new_tag = keys.select do |key|
+				item = @storage[key]
+				! yield item
+			end
+
+			@data[tag] = new_tag
+		end
+	end
 end