Resolve Rails/IndexBy rubocop offenses

Exclude Rails/IndexBy from `tooling/danger` as it's not available.

Changelog: other
EE: true

.rubocop.yml

@@ -239,6 +239,10 @@ Rails/FindBy:
     - 'spec/**/*.rb'
     - 'ee/spec/**/*.rb'
 
+Rails/IndexBy:
+  Exclude:
+    - 'tooling/danger/**/*.rb'
+
 # This is currently exiting with a rubocop exception error and should be
 # resolved hopefully a future update
 # An error occurred while Rails/UniqueValidationWithoutIndex cop was inspecting

.rubocop_todo.yml

@@ -458,24 +458,6 @@ Rails/HasManyOrHasOneDependent:
 Rails/HelperInstanceVariable:
   Enabled: false
 
-# Offense count: 17
-# Cop supports --auto-correct.
-Rails/IndexBy:
-  Exclude:
-    - 'app/graphql/types/design_management/design_fields.rb'
-    - 'app/models/ci/pipeline.rb'
-    - 'app/services/ci/pipeline_processing/atomic_processing_service/status_collection.rb'
-    - 'ee/app/services/projects/update_mirror_service.rb'
-    - 'ee/app/services/security/store_report_service.rb'
-    - 'ee/lib/ee/gitlab/auth/ldap/sync/group.rb'
-    - 'ee/lib/ee/gitlab/background_migration/backfill_version_data_from_gitaly.rb'
-    - 'ee/lib/gitlab/analytics/type_of_work/tasks_by_type.rb'
-    - 'ee/lib/gitlab/elastic/document_reference.rb'
-    - 'ee/lib/gitlab/group_plans_preloader.rb'
-    - 'lib/gitlab/database/count/reltuples_count_strategy.rb'
-    - 'lib/gitlab/language_detection.rb'
-    - 'tooling/danger/sidekiq_queues.rb'
-
 # Offense count: 47
 # Cop supports --auto-correct.
 Rails/IndexWith:

app/graphql/types/design_management/design_fields.rb

@@ -62,7 +62,7 @@ module Types
 
       def cached_actions_for_version(version)
         Gitlab::SafeRequestStore.fetch(['DesignFields', 'actions_for_version', version.id]) do
-          version.actions.to_h { |dv| [dv.design_id, dv] }
+          version.actions.index_by(&:design_id)
         end
       end
 

app/models/ci/pipeline.rb

@@ -421,9 +421,7 @@ module Ci
 
       sql = sql.where(ref: ref) if ref
 
-      sql.each_with_object({}) do |pipeline, hash|
-        hash[pipeline.sha] = pipeline
-      end
+      sql.index_by(&:sha)
     end
 
     def self.latest_successful_ids_per_project

app/services/ci/pipeline_processing/atomic_processing_service/status_collection.rb

@@ -91,17 +91,13 @@ module Ci
 
         def all_statuses_by_id
           strong_memoize(:all_statuses_by_id) do
-            all_statuses.to_h do |row|
-              [row[:id], row]
-            end
+            all_statuses.index_by { |row| row[:id] }
           end
         end
 
         def all_statuses_by_name
           strong_memoize(:statuses_by_name) do
-            all_statuses.to_h do |row|
-              [row[:name], row]
-            end
+            all_statuses.index_by { |row| row[:name] }
           end
         end
 

ee/app/services/projects/update_mirror_service.rb

@@ -61,7 +61,7 @@ module Projects
     end
 
     def update_branches
-      local_branches = repository.branches.each_with_object({}) { |branch, branches| branches[branch.name] = branch }
+      local_branches = repository.branches.index_by(&:name)
 
       errors = []
 
@@ -96,7 +96,7 @@ module Projects
     end
 
     def update_tags(&block)
-      old_tags = repository_tags_with_target.each_with_object({}) { |tag, tags| tags[tag.name] = tag }
+      old_tags = repository_tags_with_target.index_by(&:name)
 
       fetch_result = yield
       return fetch_result unless fetch_result&.tags_changed

ee/lib/ee/gitlab/auth/ldap/sync/group.rb

@@ -293,7 +293,7 @@ module EE
             # returns a hash user_id -> LDAP identity in current LDAP provider
             def resolve_ldap_identities(for_users:)
               ::Identity.for_user(for_users).with_provider(provider)
-                .to_h { |identity| [identity.user_id, identity] }
+                .index_by(&:user_id)
             end
 
             # returns a hash of normalized DN -> user for the current LDAP provider

ee/lib/gitlab/analytics/type_of_work/tasks_by_type.rb

@@ -96,7 +96,7 @@ module Gitlab
         end
 
         def labels_by_id
-          @labels_by_id = labels.each_with_object({}) { |label, hash| hash[label.id] = label }
+          @labels_by_id = labels.index_by(&:id)
         end
       end
     end

ee/lib/gitlab/elastic/document_reference.rb

@@ -32,7 +32,7 @@ module Gitlab
             ids = group.map(&:db_id)
 
             records = klass.id_in(ids).preload_indexing_data
-            records_by_id = records.each_with_object({}) { |record, hash| hash[record.id] = record }
+            records_by_id = records.index_by(&:id)
 
             group.each do |ref|
               ref.database_record = records_by_id[ref.db_id.to_i]

ee/lib/gitlab/group_plans_preloader.rb

@@ -19,9 +19,7 @@ module Gitlab
         activerecord_relation(groups)
       )
       # A Hash mapping group IDs to their corresponding Group instances.
-      groups_map = groups_and_ancestors.each_with_object({}) do |group, hash|
-        hash[group.id] = group
-      end
+      groups_map = groups_and_ancestors.index_by(&:id)
 
       all_plan_ids = Set.new
 
@@ -45,9 +43,7 @@ module Gitlab
       # Grab all the plans for all the Groups, using only a single query.
       plans = Plan
         .where(id: all_plan_ids.to_a)
-        .each_with_object({}) do |plan, hash|
-          hash[plan.id] = plan
-        end
+        .index_by(&:id)
 
       # Assign all the plans to the groups that have access to them.
       groups.each do |group|

lib/gitlab/database/count/reltuples_count_strategy.rb

@@ -46,7 +46,7 @@ module Gitlab
         end
 
         def table_to_model_mapping
-          @table_to_model_mapping ||= models.each_with_object({}) { |model, h| h[model.table_name] = model }
+          @table_to_model_mapping ||= models.index_by(&:table_name)
         end
 
         def table_to_model(table_name)

lib/gitlab/language_detection.rb

@@ -63,7 +63,7 @@ module Gitlab
         @repository
         .languages
         .first(MAX_LANGUAGES)
-        .to_h { |l| [l[:label], l] }
+        .index_by { |l| l[:label] }
     end
   end
 end