HI am using acts_as_tree and yui to generate tree structure, as per the DB is consern for acts_as_tree,the parent and child nodes are from one table.. i have two different table like region table ------------- pk name 1 hyderabad 2 chennai 3 bangalore area tabel id name fk 1 madhapur 1 2 hi-tech 1 3 kondapur 1 4 adayar 2 5 ECR road 2 6 anna nagar 2 7 whitefiled 3 8 MGM 3 so i need name in region table as root node and the respective fk names in area table as child nodes(i dont need subchild node ).. how can i use acts_as_tree for this table,are is there an alternative to do this