Add name validation to Terraform state

Require name for Terraform state
Add fix to Terraform remote handler service

app/models/terraform/state.rb

@@ -24,6 +24,7 @@ module Terraform
     scope :ordered_by_name, -> { order(:name) }
     scope :with_name, -> (name) { where(name: name) }
 
+    validates :name, presence: true, uniqueness: { scope: :project_id }
     validates :project_id, presence: true
     validates :uuid, presence: true, uniqueness: true, length: { is: UUID_LENGTH },
               format: { with: HEX_REGEXP, message: 'only allows hex characters' }

app/services/terraform/remote_state_handler.rb

@@ -68,12 +68,14 @@ module Terraform
 
       find_params = { project: project, name: params[:name] }
 
-      if find_only
-        Terraform::State.find_by(find_params) || # rubocop: disable CodeReuse/ActiveRecord
-          raise(ActiveRecord::RecordNotFound.new("Couldn't find state"))
-      else
-        Terraform::State.create_or_find_by(find_params)
-      end
+      return find_state!(find_params) if find_only
+
+      state = Terraform::State.create_or_find_by(find_params)
+
+      # https://github.com/rails/rails/issues/36027
+      return state unless state.errors.of_kind? :name, :taken
+
+      find_state(find_params)
     end
 
     def lock_matches?(state)
@@ -86,5 +88,13 @@ module Terraform
     def can_modify_state?
       current_user.can?(:admin_terraform_state, project)
     end
+
+    def find_state(find_params)
+      Terraform::State.find_by(find_params) # rubocop: disable CodeReuse/ActiveRecord
+    end
+
+    def find_state!(find_params)
+      find_state(find_params) || raise(ActiveRecord::RecordNotFound.new("Couldn't find state"))
+    end
   end
 end

changelogs/unreleased/298703-terraform-name-validation.yml

+---
+title: Add name validation to Terraform state
+merge_request: 52102
+author:
+type: changed

spec/models/terraform/state_spec.rb

@@ -8,8 +8,11 @@ RSpec.describe Terraform::State do
   it { is_expected.to belong_to(:project) }
   it { is_expected.to belong_to(:locked_by_user).class_name('User') }
 
+  it { is_expected.to validate_presence_of(:name) }
   it { is_expected.to validate_presence_of(:project_id) }
 
+  it { is_expected.to validate_uniqueness_of(:name).scoped_to(:project_id) }
+
   describe 'scopes' do
     describe '.ordered_by_name' do
       let_it_be(:project) { create(:project) }