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Replace hard coded nwr enumeration support with a more generic

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system for defining enumerations.
This commit is contained in:
Tom Hughes 2009-08-04 13:23:36 +00:00
parent 9c89bd53bf
commit 63f61b5f04
2 changed files with 43 additions and 19 deletions
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21
db/migrate/007_add_relations.rb
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@ -2,18 +2,19 @@ require 'lib/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
alter_column_nwr_enum :current_relation_members, :member_type
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"
@ -36,14 +37,13 @@ class AddRelations < ActiveRecord::Migration
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
alter_column_nwr_enum :relation_members, :member_type
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"
@ -78,5 +78,6 @@ class AddRelations < ActiveRecord::Migration
drop_table :current_relation_tags
drop_table :relation_members
drop_table :current_relation_members
drop_enumeration :nwr_enum
end
end