Merge branch '18339-sweep-trash-lock'

[arvados.git] / services / api / lib / can_be_an_owner.rb

diff --git a/services/api/lib/can_be_an_owner.rb b/services/api/lib/can_be_an_owner.rb
index 75a63509c206ac86fa64e39afa990073350a87cb..6f30f5ae33801afabd6c6a5e3fa6805c05e628fa 100644 (file)
--- a/services/api/lib/can_be_an_owner.rb
+++ b/services/api/lib/can_be_an_owner.rb
@@ -1,14 +1,24 @@
+# Copyright (C) The Arvados Authors. All rights reserved.
+#
+# SPDX-License-Identifier: AGPL-3.0
+
 # Protect referential integrity of owner_uuid columns in other tables
 # that can refer to the uuid column in this table.
 
 module CanBeAnOwner
 
   def self.included(base)
+    base.extend(ClassMethods)
+
     # Rails' "has_many" can prevent us from destroying the owner
     # record when other objects refer to it.
     ActiveRecord::Base.connection.tables.each do |t|
       next if t == base.table_name
       next if t == 'schema_migrations'
+      next if t == 'permission_refresh_lock'
+      next if t == 'ar_internal_metadata'
+      next if t == 'commit_ancestors'
+      next if t == 'commits'
       klass = t.classify.constantize
       next unless klass and 'owner_uuid'.in?(klass.columns.collect(&:name))
       base.has_many(t.to_sym,
@@ -22,6 +32,42 @@ module CanBeAnOwner
     base.validate :restrict_uuid_change_breaking_associations
   end
 
+  module ClassMethods
+    def install_view(type)
+      conn = ActiveRecord::Base.connection
+      transaction do
+        # Check whether the temporary view has already been created
+        # during this connection. If not, create it.
+        conn.exec_query "SAVEPOINT check_#{type}_view"
+        begin
+          conn.exec_query("SELECT 1 FROM #{type}_view LIMIT 0")
+        rescue
+          conn.exec_query "ROLLBACK TO SAVEPOINT check_#{type}_view"
+          sql = File.read(Rails.root.join("lib", "create_#{type}_view.sql"))
+          conn.exec_query(sql)
+        ensure
+          conn.exec_query "RELEASE SAVEPOINT check_#{type}_view"
+        end
+      end
+    end
+  end
+
+  def descendant_project_uuids
+    self.class.install_view('ancestor')
+    ActiveRecord::Base.connection.
+      exec_query('SELECT ancestor_view.uuid
+                  FROM ancestor_view
+                  LEFT JOIN groups ON groups.uuid=ancestor_view.uuid
+                  WHERE ancestor_uuid = $1 AND groups.group_class = $2',
+                  # "name" arg is a query label that appears in logs:
+                  "descendant_project_uuids for #{self.uuid}",
+                  # "binds" arg is an array of [col_id, value] for '$1' vars:
+                  [[nil, self.uuid], [nil, 'project']],
+                  ).rows.map do |project_uuid,|
+      project_uuid
+    end
+  end
+
   protected
 
   def restrict_uuid_change_breaking_associations
@@ -43,5 +89,4 @@ module CanBeAnOwner
       self.owner_uuid = uuid
     end
   end
-
 end