1 files changed, 22 insertions, 0 deletions
diff --git a/app/models/service_desk_setting.rb b/app/models/service_desk_setting.rb
index bcc17d32272..c5203354b9d 100644
--- a/app/models/service_desk_setting.rb
+++ b/app/models/service_desk_setting.rb
@@ -6,9 +6,12 @@ class ServiceDeskSetting < ApplicationRecord
   belongs_to :project
   validates :project_id, presence: true
   validate :valid_issue_template
+  validate :valid_project_key
   validates :outgoing_name, length: { maximum: 255 }, allow_blank: true
   validates :project_key, length: { maximum: 255 }, allow_blank: true, format: { with: /\A[a-z0-9_]+\z/ }
 
+  scope :with_project_key, ->(key) { where(project_key: key) }
+
   def issue_template_content
     strong_memoize(:issue_template_content) do
       next unless issue_template_key.present?
@@ -27,4 +30,23 @@ class ServiceDeskSetting < ApplicationRecord
       errors.add(:issue_template_key, 'is empty or does not exist')
     end
   end
+
+  def valid_project_key
+    if projects_with_same_slug_and_key_exists?
+      errors.add(:project_key, 'already in use for another service desk address.')
+    end
+  end
+
+  private
+
+  def projects_with_same_slug_and_key_exists?
+    return false unless project_key
+
+    settings = self.class.with_project_key(project_key).preload(:project)
+    project_slug = self.project.full_path_slug
+
+    settings.any? do |setting|
+      setting.project.full_path_slug == project_slug
+    end
+  end
 end