Add ability to filter by no tags on package tags page

app/blueprints/todo/__init__.py

@@ -117,9 +117,14 @@ def tags():
 	qb.setSortIfNone("score", "desc")
 	query = qb.buildPackageQuery()
 
+	only_no_tags = isYes(request.args.get("no_tags"))
+	if only_no_tags:
+		query = query.filter(Package.tags==None)
+
 	tags = Tag.query.order_by(db.asc(Tag.title)).all()
 
-	return render_template("todo/tags.html", current_tab="tags", packages=query.all(), tags=tags)
+	return render_template("todo/tags.html", current_tab="tags", packages=query.all(), \
+			tags=tags, only_no_tags=only_no_tags)
 
 
 @bp.route("/user/tags/")

app/templates/todo/tags.html

@@ -18,13 +18,22 @@
 		</form>
 	</div>
 	<div class="col-md-6 text-right">
+		{% if only_no_tags %}
+			<a class="btn btn-primary" href="{{ url_set_query(no_tags=0) }}">
+				{{ _("Missing tags only") }}
+			</a>
+		{% else %}
+			<a class="btn btn-secondary" href="{{ url_set_query(no_tags=1) }}">
+				{{ _("Missing tags only") }}
+			</a>
+		{% endif %}
 		{% if check_global_perm(current_user, "EDIT_TAGS") %}
-			<a class="btn btn-secondary" href="{{ url_for('admin.tag_list') }}">{{ _("Edit Tags") }}</a>
+			<a class="btn btn-secondary ml-2" href="{{ url_for('admin.tag_list') }}">{{ _("Edit Tags") }}</a>
 		{% endif %}
 	</div>
 </div>
 
-<table class="table mt-t">
+<table class="table mt-5">
 	<tr>
 		<th>Package</th>
 		<th></th>