+require 'migrate'
+
class AddRelations < ActiveRecord::Migration
def self.up
+ # enums work like strings but are more efficient
+ create_enumeration :nwr_enum, ["Node", "Way", "Relation"]
+
# a relation can have members much like a way can have nodes.
# differences:
# way: only nodes / relation: any kind of member
# way: ordered sequence of nodes / relation: free-form "role" string
create_table "current_relation_members", innodb_table do |t|
- t.column "id", :bigint, :limit => 64, :null => false
- t.column "member_type", :string, :limit => 11, :null => false
- t.column "member_id", :bigint, :limit => 11, :null => false
+ t.column "id", :bigint, :limit => 64, :null => false
+ t.column "member_type", :nwr_enum, :null => false
+ t.column "member_id", :bigint, :limit => 11, :null => false
t.column "member_role", :string
end
- # enums work like strings but are more efficient
- execute "alter table current_relation_members change column member_type member_type enum('node','way','relation');"
add_primary_key "current_relation_members", ["id", "member_type", "member_id", "member_role"]
add_index "current_relation_members", ["member_type", "member_id"], :name => "current_relation_members_member_idx"
end
create_table "relation_members", myisam_table do |t|
- t.column "id", :bigint, :limit => 64, :default => 0, :null => false
- t.column "member_type", :string, :limit => 11, :null => false
- t.column "member_id", :bigint, :limit => 11, :null => false
+ t.column "id", :bigint, :limit => 64, :default => 0, :null => false
+ t.column "member_type", :nwr_enum, :null => false
+ t.column "member_id", :bigint, :limit => 11, :null => false
t.column "member_role", :string
- t.column "version", :bigint, :limit => 20, :default => 0, :null => false
+ t.column "version", :bigint, :limit => 20, :default => 0, :null => false
end
- execute "alter table relation_members change column member_type member_type enum('node','way','relation');"
add_primary_key "relation_members", ["id", "version", "member_type", "member_id", "member_role"]
add_index "relation_members", ["member_type", "member_id"], :name => "relation_members_member_idx"
drop_table :current_relation_tags
drop_table :relation_members
drop_table :current_relation_members
+ drop_enumeration :nwr_enum
end
end