Improved migration for issue #1375 - Improved handling assignment_timeout.

db/migrate/20170830000001_last_owner_update.rb

@@ -1,57 +0,0 @@
-class LastOwnerUpdate < ActiveRecord::Migration[4.2]
-  def up
-
-    # return if it's a new setup
-    return if !Setting.find_by(name: 'system_init_done')
-
-    # reset assignment_timeout to prevent unwanted things happen
-    Group.all.each do |group|
-      group.assignment_timeout = nil
-      group.save!
-    end
-
-    add_column :tickets, :last_owner_update_at, :timestamp, limit: 3, null: true
-    add_index :tickets, [:last_owner_update_at]
-    Ticket.reset_column_information
-
-    Scheduler.create_if_not_exists(
-      name: 'Process auto unassign tickets',
-      method: 'Ticket.process_auto_unassign',
-      period: 10.minutes,
-      prio: 1,
-      active: true,
-      updated_by_id: 1,
-      created_by_id: 1,
-    )
-
-    state_ids = Ticket::State.by_category(:work_on).pluck(:id)
-    if state_ids.present?
-      ticket_ids = Ticket.where('tickets.state_id IN (?) AND tickets.owner_id != 1', state_ids).order(created_at: :desc).limit(1000).pluck(:id)
-      ticket_ids.each do |ticket_id|
-        ticket = Ticket.find_by(id: ticket_id)
-        next if !ticket
-        ticket.last_owner_update_at = last_owner_update_at(ticket)
-        ticket.save!
-      end
-    end
-  end
-
-  def last_owner_update_at(ticket)
-    type = History::Type.lookup(name: 'updated')
-    if type
-      object = History::Object.lookup(name: 'Ticket')
-      if object
-        attribute = History::Attribute.lookup(name: 'owner')
-        if attribute
-          history = History.where(o_id: ticket.id, history_type_id: type.id, history_object_id: object.id, history_attribute_id: attribute.id).where.not(id_to: 1).order(created_at: :desc).limit(1)
-          if history.present?
-            return history.first.created_at
-          end
-        end
-      end
-    end
-    return nil if ticket.owner_id == 1
-    ticket.created_at
-  end
-
-end

db/migrate/20171102000001_last_owner_update2.rb

@@ -0,0 +1,32 @@
+class LastOwnerUpdate2 < ActiveRecord::Migration[5.1]
+  def up
+
+    # return if it's a new setup
+    return if !Setting.find_by(name: 'system_init_done')
+
+    # reset assignment_timeout to prevent unwanted things happen
+    Group.all.each do |group|
+      group.assignment_timeout = nil
+      group.save!
+    end
+
+    # check if column already exists
+    if !ActiveRecord::Base.connection.column_exists?(:tickets, :last_owner_update_at)
+      add_column :tickets, :last_owner_update_at, :timestamp, limit: 3, null: true
+      add_index :tickets, [:last_owner_update_at]
+      Ticket.reset_column_information
+    end
+
+    Scheduler.create_if_not_exists(
+      name: 'Process auto unassign tickets',
+      method: 'Ticket.process_auto_unassign',
+      period: 10.minutes,
+      prio: 1,
+      active: true,
+      updated_by_id: 1,
+      created_by_id: 1,
+    )
+
+  end
+
+end