Query projects by ids

This commit allows our GraphQL API to query projects by ids.

app/graphql/resolvers/projects_resolver.rb

@@ -12,9 +12,13 @@ module Resolvers
              required: false,
              description: 'Search query for project name, path, or description'
+    argument :ids, [GraphQL::ID_TYPE],
+            required: false,
+            description: 'Filter projects by IDs'
+
     def resolve(**args)
       ProjectsFinder
-        .new(current_user: current_user, params: project_finder_params(args))
+        .new(current_user: current_user, params: project_finder_params(args), project_ids_relation: parse_gids(args[:ids]))
         .execute
     end
@@ -27,5 +31,9 @@ module Resolvers
         search: params[:search]
       }.compact
     end
+
+    def parse_gids(gids)
+      gids&.map { |gid| GitlabSchema.parse_gid(gid, expected_type: ::Project).model_id }
+    end
   end
 end

changelogs/unreleased/mo-graphql-query-projects-by-ids.yml

+---
+title: Query projects by ids with GraphQL
+merge_request: 42372
+author:
+type: added

doc/api/graphql/reference/gitlab_schema.graphql

@@ -13981,6 +13981,11 @@ type Query {
     """
     first: Int
+    """
+    Filter projects by IDs
+    """
+    ids: [ID!]
+
     """
     Returns the last _n_ elements from the list.
     """

doc/api/graphql/reference/gitlab_schema.json

@@ -40936,6 +40936,24 @@
                   },
                   "defaultValue": null
                 },
+                {
+                  "name": "ids",
+                  "description": "Filter projects by IDs",
+                  "type": {
+                    "kind": "LIST",
+                    "name": null,
+                    "ofType": {
+                      "kind": "NON_NULL",
+                      "name": null,
+                      "ofType": {
+                        "kind": "SCALAR",
+                        "name": "ID",
+                        "ofType": null
+                      }
+                    }
+                  },
+                  "defaultValue": null
+                },
                 {
                   "name": "after",
                   "description": "Returns the elements in the list that come after the specified cursor.",

spec/graphql/resolvers/projects_resolver_spec.rb

@@ -71,6 +71,14 @@ RSpec.describe Resolvers::ProjectsResolver do
             is_expected.to contain_exactly(project, private_project)
           end
         end
+
+        context 'when ids filter is provided' do
+          let(:filters) { { ids: [project.to_global_id.to_s] } }
+
+          it 'returns matching project' do
+            is_expected.to contain_exactly(project)
+          end
+        end
       end
     end
   end