Enable searching of projects by full path

This affects projects search and dropdowns across GitLab

app/models/project.rb

@@ -542,7 +542,11 @@ class Project < ApplicationRecord
     #
     # query - The search query as a String.
     def search(query)
-      fuzzy_search(query, [:path, :name, :description])
+      if Feature.enabled?(:project_search_by_full_path, default_enabled: true)
+        joins(:route).fuzzy_search(query, [Route.arel_table[:path], :name, :description])
+      else
+        fuzzy_search(query, [:path, :name, :description])
+      end
     end
 
     def search_by_title(query)

changelogs/unreleased/hly-search-by-project-full-path.yml

+---
+title: Allow searching of projects by full path
+merge_request: 20659
+author:
+type: added

lib/gitlab/sql/pattern.rb

@@ -35,7 +35,7 @@ module Gitlab
           query.length >= min_chars_for_partial_matching
         end
 
-        # column - The column name to search in.
+        # column - The column name / Arel column to search in.
         # query - The text to search for.
         # lower_exact_match - When set to `true` we'll fall back to using
         #                     `LOWER(column) = query` instead of using `ILIKE`.
@@ -43,19 +43,21 @@ module Gitlab
           query = query.squish
           return unless query.present?
 
+          arel_column = column.is_a?(Arel::Attributes::Attribute) ? column : arel_table[column]
+
           words = select_fuzzy_words(query, use_minimum_char_limit: use_minimum_char_limit)
 
           if words.any?
-            words.map { |word| arel_table[column].matches(to_pattern(word, use_minimum_char_limit: use_minimum_char_limit)) }.reduce(:and)
+            words.map { |word| arel_column.matches(to_pattern(word, use_minimum_char_limit: use_minimum_char_limit)) }.reduce(:and)
           else
             # No words of at least 3 chars, but we can search for an exact
             # case insensitive match with the query as a whole
             if lower_exact_match
               Arel::Nodes::NamedFunction
-                .new('LOWER', [arel_table[column]])
+                .new('LOWER', [arel_column])
                 .eq(query)
             else
-              arel_table[column].matches(sanitize_sql_like(query))
+              arel_column.matches(sanitize_sql_like(query))
             end
           end
         end

spec/lib/gitlab/sql/pattern_spec.rb

@@ -207,5 +207,15 @@ describe Gitlab::SQL::Pattern do
         expect(fuzzy_arel_match.to_sql).to match(/title.+I?LIKE '\%foo\%' AND .*title.*I?LIKE '\%baz\%' AND .*title.*I?LIKE '\%really bar\%'/)
       end
     end
+
+    context 'when passing an Arel column' do
+      let(:query) { 'foo' }
+
+      subject(:fuzzy_arel_match) { Project.fuzzy_arel_match(Route.arel_table[:path], query) }
+
+      it 'returns a condition with the table and column name' do
+        expect(fuzzy_arel_match.to_sql).to match(/"routes"."path".*ILIKE '\%foo\%'/)
+      end
+    end
   end
 end

spec/models/project_spec.rb

@@ -1661,7 +1661,7 @@ describe Project do
   end
 
   describe '.search' do
-    let(:project) { create(:project, description: 'kitten mittens') }
+    let_it_be(:project) { create(:project, description: 'kitten mittens') }
 
     it 'returns projects with a matching name' do
       expect(described_class.search(project.name)).to eq([project])
@@ -1699,6 +1699,39 @@ describe Project do
       expect(described_class.search(project.path.upcase)).to eq([project])
     end
 
+    context 'by full path' do
+      let_it_be(:group) { create(:group) }
+      let_it_be(:project) { create(:project, group: group) }
+
+      context 'when feature is enabled' do
+        before do
+          stub_feature_flags(project_search_by_full_path: true)
+        end
+
+        it 'returns projects that match the group path' do
+          expect(described_class.search(group.path)).to eq([project])
+        end
+
+        it 'returns projects that match the full path' do
+          expect(described_class.search(project.full_path)).to eq([project])
+        end
+      end
+
+      context 'when feature is disabled' do
+        before do
+          stub_feature_flags(project_search_by_full_path: false)
+        end
+
+        it 'returns no results when searching by group path' do
+          expect(described_class.search(group.path)).to be_empty
+        end
+
+        it 'returns no results when searching by full path' do
+          expect(described_class.search(project.full_path)).to be_empty
+        end
+      end
+    end
+
     describe 'with pending_delete project' do
       let(:pending_delete_project) { create(:project, pending_delete: true) }