Support multi-substring search in project selector

Author: wielinde

app/models/queries/projects/filters/name_filter.rb

@@ -40,7 +40,9 @@ def where
     when "!"
       ["LOWER(projects.name) NOT IN (?)", sql_value]
     when "~", "**"
-      ["LOWER(projects.name) LIKE ?", "%#{sql_value}%"]
+      terms = values.first.downcase.split
+      conditions = Array.new(terms.size, "LOWER(projects.name) LIKE ?").join(" AND ")
+      [conditions, *terms.map { |t| "%#{t}%" }]
     when "!~"
       ["LOWER(projects.name) NOT LIKE ?", "%#{sql_value}%"]
     end

frontend/src/app/shared/components/header-project-select/header-project-select.component.ts

@@ -81,7 +81,8 @@ export class OpHeaderProjectSelectComponent extends UntilDestroyedMixin implemen
           (project) => {
             const searchText = this.searchableProjectListService.searchText;
             if (searchText.length) {
-              const matches = project.name.toLowerCase().includes(searchText.toLowerCase());
+              const terms = searchText.toLowerCase().split(/\s+/).filter((t) => t.length > 0);
+              const matches = terms.every((term) => project.name.toLowerCase().includes(term));
 
               if (!matches) {
                 return false;

spec/features/projects/project_autocomplete_spec.rb

@@ -78,6 +78,7 @@
       create(:project, name:, identifier:, members: { user => role })
     end
   end
+  
   shared_let(:non_member_project) { create(:project) }
   shared_let(:public_project) { create(:public_project) }
 
@@ -110,10 +111,10 @@
       expect(page).to have_no_css("strong")
     end
 
-    # Expect fuzzy matches for plain
+    # Expect fuzzy matches for multiple substrings
     top_menu.search "Plain pr"
     top_menu.expect_result "Plain project"
-    top_menu.expect_no_result "Plain other project"
+    top_menu.expect_result "Plain other project"
 
     # Expect search to match names only and not the identifier
     top_menu.clear_search