Prevent app crash if team owner removed

app/models/user.rb

@@ -46,10 +46,35 @@ class User < ActiveRecord::Base
   attr_accessor :force_random_password
+  #
+  # Relations
+  #
+
   # Namespace for personal projects
-  has_one :namespace,                 dependent: :destroy, foreign_key: :owner_id,    class_name: "Namespace", conditions: 'type IS NULL'
-  has_many :keys,                     dependent: :destroy
+  has_one :namespace,
+    dependent: :destroy,
+    foreign_key: :owner_id,
+    class_name: "Namespace",
+    conditions: 'type IS NULL'
+
+  # Profile
+  has_many :keys, dependent: :destroy
+
+  # Groups
+  has_many :groups, class_name: "Group", foreign_key: :owner_id
+
+  # Teams
+  has_many :own_teams,
+    class_name: "UserTeam",
+    foreign_key: :owner_id,
+    dependent: :destroy
+
+  has_many :user_team_user_relationships, dependent: :destroy
+  has_many :user_teams, through: :user_team_user_relationships
+  has_many :user_team_project_relationships, through: :user_teams
+  has_many :team_projects, through: :user_team_project_relationships
+  # Projects
   has_many :users_projects,           dependent: :destroy
   has_many :issues,                   dependent: :destroy, foreign_key: :author_id
   has_many :notes,                    dependent: :destroy, foreign_key: :author_id
@@ -57,18 +82,16 @@ class User < ActiveRecord::Base
   has_many :events,                   dependent: :destroy, foreign_key: :author_id,   class_name: "Event"
   has_many :assigned_issues,          dependent: :destroy, foreign_key: :assignee_id, class_name: "Issue"
   has_many :assigned_merge_requests,  dependent: :destroy, foreign_key: :assignee_id, class_name: "MergeRequest"
-  has_many :groups,         class_name: "Group", foreign_key: :owner_id
-  has_many :recent_events,  class_name: "Event", foreign_key: :author_id, order: "id DESC"
-
-  has_many :projects,       through: :users_projects
-
-  has_many :user_team_user_relationships, dependent: :destroy
-
-  has_many :user_teams,                      through: :user_team_user_relationships
-  has_many :user_team_project_relationships, through: :user_teams
-  has_many :team_projects,                   through: :user_team_project_relationships
+  has_many :projects, through: :users_projects
+  has_many :recent_events,
+    class_name: "Event",
+    foreign_key: :author_id,
+    order: "id DESC"
+  #
+  # Validations
+  #
   validates :name, presence: true
   validates :email, presence: true, format: { with: /\A([^@\s]+)@((?:[-a-z0-9]+\.)+[a-z]{2,})\Z/ }
   validates :bio, length: { within: 0..255 }

app/views/admin/groups/index.html.haml

@@ -26,7 +26,7 @@
     %tr
       %td
         %strong= link_to group.name, [:admin, group]
-      %td= group.description
+      %td= truncate group.description
       %td= group.path
       %td= group.projects.count
       %td

app/views/admin/teams/index.html.haml

@@ -27,12 +27,15 @@
     %tr
       %td
         %strong= link_to team.name, admin_team_path(team)
-      %td= team.description
+      %td= truncate team.description
       %td= team.path
       %td= team.projects.count
       %td= team.members.count
       %td
-        = link_to team.owner.name, admin_user_path(team.owner)
+        - if team.owner
+          = link_to team.owner.name, admin_user_path(team.owner)
+        - else
+          (deleted)
       %td.bgred
         = link_to 'Edit', edit_admin_team_path(team), id: "edit_#{dom_id(team)}", class: "btn btn-small"
         = link_to 'Destroy', admin_team_path(team), confirm: "REMOVE #{team.name}? Are you sure?", method: :delete, class: "btn btn-small btn-remove"