Ignore Issue and MR IID search out of range error

ee/changelogs/unreleased/287661_lenient_iid_outofrange.yml

+---
+title: Ignore Issue and MR IID search out of range error
+merge_request: 49284
+author:
+type: fixed

ee/lib/elastic/latest/application_class_proxy.rb

@@ -67,6 +67,7 @@ module Elastic
                       _name: context.name(self.es_type, :match, :search_terms),
                       fields: fields,
                       query: query,
+                      lenient: true,
                       default_operator: default_operator
                     }
                   }],

ee/lib/elastic/latest/issue_class_proxy.rb

@@ -10,13 +10,9 @@ module Elastic
           if query =~ /#(\d+)\z/
             iid_query_hash(Regexp.last_match(1))
           else
-            fields = %w(title^2 description)
-
-            # We can only allow searching the iid field if the query is
-            # just a number, otherwise Elasticsearch will error since this
-            # field is type integer.
-            fields << "iid^3" if query =~ /\A\d+\z/
-
+            # iid field can be added here as lenient option will
+            # pardon format errors, like integer out of range.
+            fields = %w(iid^3 title^2 description)
             basic_query_hash(fields, query)
           end
 

ee/lib/elastic/latest/merge_request_class_proxy.rb

@@ -10,13 +10,9 @@ module Elastic
           if query =~ /\!(\d+)\z/
             iid_query_hash(Regexp.last_match(1))
           else
-            fields = %w(title^2 description)
-
-            # We can only allow searching the iid field if the query is
-            # just a number, otherwise Elasticsearch will error since this
-            # field is type integer.
-            fields << "iid^3" if query =~ /\A\d+\z/
-
+            # iid field can be added here as lenient option will
+            # pardon format errors, like integer out of range.
+            fields = %w(iid^3 title^2 description)
             basic_query_hash(fields, query)
           end
 

ee/spec/lib/gitlab/elastic/search_results_spec.rb

@@ -204,7 +204,7 @@ RSpec.describe Gitlab::Elastic::SearchResults, :elastic, :sidekiq_might_not_need
 
   describe 'issues' do
     let(:scope) { 'issues' }
-    let!(:issue_1) { create(:issue, project: project_1, title: 'Hello world, here I am!', iid: 1) }
+    let!(:issue_1) { create(:issue, project: project_1, title: 'Hello world, here I am!', description: '20200623170000, see details in issue 287661', iid: 1) }
     let!(:issue_2) { create(:issue, project: project_1, title: 'Issue Two', description: 'Hello world, here I am!', iid: 2) }
     let!(:issue_3) { create(:issue, project: project_2, title: 'Issue Three', iid: 2) }
 
@@ -245,6 +245,14 @@ RSpec.describe Gitlab::Elastic::SearchResults, :elastic, :sidekiq_might_not_need
       expect(results.issues_count).to eq 1
     end
 
+    it 'finds the issue with an out of integer range number in its description without exception' do
+      results = described_class.new(user, '20200623170000', limit_project_ids, public_and_internal_projects: false)
+      issues = results.objects('issues')
+
+      expect(issues).to contain_exactly(issue_1)
+      expect(results.issues_count).to eq 1
+    end
+
     it 'returns empty list when search by invalid iid' do
       results = described_class.new(user, '#222', limit_project_ids)
 
@@ -546,6 +554,7 @@ RSpec.describe Gitlab::Elastic::SearchResults, :elastic, :sidekiq_might_not_need
         source_project: project_1,
         target_project: project_1,
         title: 'Hello world, here I am!',
+        description: '20200623170000, see details in issue 287661',
         iid: 1
       )
       @merge_request_2 = create(
@@ -601,6 +610,14 @@ RSpec.describe Gitlab::Elastic::SearchResults, :elastic, :sidekiq_might_not_need
       expect(results.merge_requests_count).to eq 1
     end
 
+    it 'finds the MR with an out of integer range number in its description without exception' do
+      results = described_class.new(user, '20200623170000', limit_project_ids, public_and_internal_projects: false)
+      merge_requests = results.objects('merge_requests')
+
+      expect(merge_requests).to contain_exactly(@merge_request_1)
+      expect(results.merge_requests_count).to eq 1
+    end
+
     it 'returns empty list when search by invalid iid' do
       results = described_class.new(user, '#222', limit_project_ids)