rails_port_0.5: Merge rails_port r4664.

[rails.git] / db / migrate / 007_add_relations.rb

diff --git a/db/migrate/007_add_relations.rb b/db/migrate/007_add_relations.rb
new file mode 100644 (file)
index 0000000..a30642e
--- /dev/null
+++ b/db/migrate/007_add_relations.rb
@@ -0,0 +1,83 @@
+class AddRelations < ActiveRecord::Migration
+  def self.up
+    # 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 "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"
+    # the following is obsolete given the primary key, is it not?
+    # add_index "current_relation_members", ["id"], :name => "current_relation_members_id_idx"
+    create_table "current_relation_tags", myisam_table do |t|
+      t.column "id", :bigint, :limit => 64, :null => false
+      t.column "k",  :string, :default => "", :null => false
+      t.column "v",  :string, :default => "", :null => false
+    end
+
+    add_index "current_relation_tags", ["id"], :name => "current_relation_tags_id_idx"
+    execute "CREATE FULLTEXT INDEX `current_relation_tags_v_idx` ON `current_relation_tags` (`v`)"
+
+    create_table "current_relations", innodb_table do |t|
+      t.column "id",        :bigint,   :limit => 64, :null => false
+      t.column "user_id",   :bigint,   :limit => 20, :null => false
+      t.column "timestamp", :datetime, :null => false
+      t.column "visible",   :boolean,  :null => false
+    end
+
+    add_primary_key "current_relations", ["id"]
+    change_column "current_relations", "id", :bigint, :limit => 64, :null => false, :options => "AUTO_INCREMENT"
+
+    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 "member_role", :string
+      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"
+
+    create_table "relation_tags", myisam_table do |t|
+      t.column "id",      :bigint,  :limit => 64, :default => 0, :null => false
+      t.column "k",       :string, :null => false, :default => ""
+      t.column "v",       :string, :null => false, :default => ""
+      t.column "version", :bigint,  :limit => 20, :null => false
+    end
+
+    add_index "relation_tags", ["id", "version"], :name => "relation_tags_id_version_idx"
+
+    create_table "relations", myisam_table do |t|
+      t.column "id",        :bigint,   :limit => 64, :null => false, :default => 0
+      t.column "user_id",   :bigint,   :limit => 20, :null => false
+      t.column "timestamp", :datetime,               :null => false
+      t.column "version",   :bigint,   :limit => 20, :null => false
+      t.column "visible",   :boolean,                :null => false, :default => true
+    end
+
+    add_primary_key "relations", ["id", "version"]
+    add_index "relations", ["timestamp"], :name => "relations_timestamp_idx"
+    
+    change_column "relations", "version", :bigint, :limit => 20, :null => false, :options => "AUTO_INCREMENT"
+  end
+
+
+  def self.down
+    drop_table :relations
+    drop_table :current_relations
+    drop_table :relation_tags
+    drop_table :current_relation_tags
+    drop_table :relation_members
+    drop_table :current_relation_members
+  end
+end