Add project type for global search from ES

ee/changelogs/unreleased/cl-search-project-type.yml

+---
+title: Make sure type is set properly in Elasticsearch query when doing global search
+merge_request: 22821
+author:
+type: fixed

ee/lib/elastic/latest/project_class_proxy.rb

@@ -8,7 +8,7 @@ module Elastic
 
         query_hash = basic_query_hash(options[:in], query)
 
-        filters = []
+        filters = [{ terms: { type: [es_type] } }]
 
         if options[:namespace_id]
           filters << {

ee/spec/models/concerns/elastic/project_spec.rb

@@ -94,6 +94,24 @@ describe Project, :elastic do
     end
   end
 
+  # This test is added to address the issues described in
+  context 'when projects and snippets co-exist', issue: 'https://gitlab.com/gitlab-org/gitlab/issues/36340' do
+    before do
+      create :project
+      create :snippet, :public
+    end
+
+    context 'when searching with a wildcard' do
+      it 'only returns projects', :sidekiq_inline do
+        Gitlab::Elastic::Helper.refresh_index
+        response = described_class.elastic_search('*')
+
+        expect(response.total_count).to eq(1)
+        expect(response.results.first['_source']['type']).to eq(Project.es_type)
+      end
+    end
+  end
+
   it "finds projects" do
     project_ids = []