3 class AddRelations < ActiveRecord::Migration
5 # enums work like strings but are more efficient
6 create_enumeration :nwr_enum, %w[Node Way Relation]
8 # a relation can have members much like a way can have nodes.
10 # way: only nodes / relation: any kind of member
11 # way: ordered sequence of nodes / relation: free-form "role" string
12 create_table "current_relation_members", :id => false do |t|
13 t.column "id", :bigint, :null => false
14 t.column "member_type", :nwr_enum, :null => false
15 t.column "member_id", :bigint, :null => false
16 t.column "member_role", :string
19 add_primary_key "current_relation_members", %w[id member_type member_id member_role]
20 add_index "current_relation_members", %w[member_type member_id], :name => "current_relation_members_member_idx"
21 # the following is obsolete given the primary key, is it not?
22 # add_index "current_relation_members", ["id"], :name => "current_relation_members_id_idx"
23 create_table "current_relation_tags", :id => false do |t|
24 t.column "id", :bigint, :null => false
25 t.column "k", :string, :default => "", :null => false
26 t.column "v", :string, :default => "", :null => false
29 add_index "current_relation_tags", ["id"], :name => "current_relation_tags_id_idx"
30 add_index "current_relation_tags", "v", :name => "current_relation_tags_v_idx"
32 create_table "current_relations", :id => false do |t|
33 t.column "id", :bigserial, :primary_key => true, :null => false
34 t.column "user_id", :bigint, :null => false
35 t.column "timestamp", :datetime, :null => false
36 t.column "visible", :boolean, :null => false
39 create_table "relation_members", :id => false do |t|
40 t.column "id", :bigint, :default => 0, :null => false
41 t.column "member_type", :nwr_enum, :null => false
42 t.column "member_id", :bigint, :null => false
43 t.column "member_role", :string
44 t.column "version", :bigint, :default => 0, :null => false
47 add_primary_key "relation_members", %w[id version member_type member_id member_role]
48 add_index "relation_members", %w[member_type member_id], :name => "relation_members_member_idx"
50 create_table "relation_tags", :id => false do |t|
51 t.column "id", :bigint, :default => 0, :null => false
52 t.column "k", :string, :null => false, :default => ""
53 t.column "v", :string, :null => false, :default => ""
54 t.column "version", :bigint, :null => false
57 add_index "relation_tags", %w[id version], :name => "relation_tags_id_version_idx"
59 create_table "relations", :id => false do |t|
60 t.column "id", :bigint, :null => false, :default => 0
61 t.column "user_id", :bigint, :null => false
62 t.column "timestamp", :datetime, :null => false
63 t.column "version", :bigint, :null => false
64 t.column "visible", :boolean, :null => false, :default => true
67 add_primary_key "relations", %w[id version]
68 add_index "relations", ["timestamp"], :name => "relations_timestamp_idx"
73 drop_table :current_relations
74 drop_table :relation_tags
75 drop_table :current_relation_tags
76 drop_table :relation_members
77 drop_table :current_relation_members
78 drop_enumeration :nwr_enum