78 lines
3.3 KiB
Ruby
78 lines
3.3 KiB
Ruby
class AddRelations < ActiveRecord::Migration[4.2]
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def self.up
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# enums work like strings but are more efficient
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create_enum :nwr_enum, %w[Node Way Relation]
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# a relation can have members much like a way can have nodes.
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# differences:
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# way: only nodes / relation: any kind of member
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# way: ordered sequence of nodes / relation: free-form "role" string
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create_table "current_relation_members", :id => false do |t|
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t.column "id", :bigint, :null => false
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t.column "member_type", :nwr_enum, :null => false
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t.column "member_id", :bigint, :null => false
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t.column "member_role", :string
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end
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add_primary_key "current_relation_members", %w[id member_type member_id member_role]
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add_index "current_relation_members", %w[member_type member_id], :name => "current_relation_members_member_idx"
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# the following is obsolete given the primary key, is it not?
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# add_index "current_relation_members", ["id"], :name => "current_relation_members_id_idx"
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create_table "current_relation_tags", :id => false do |t|
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t.column "id", :bigint, :null => false
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t.column "k", :string, :default => "", :null => false
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t.column "v", :string, :default => "", :null => false
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end
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add_index "current_relation_tags", ["id"], :name => "current_relation_tags_id_idx"
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add_index "current_relation_tags", "v", :name => "current_relation_tags_v_idx"
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create_table "current_relations", :id => false do |t|
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t.column "id", :bigserial, :primary_key => true, :null => false
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t.column "user_id", :bigint, :null => false
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t.column "timestamp", :datetime, :null => false
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t.column "visible", :boolean, :null => false
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end
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create_table "relation_members", :id => false do |t|
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t.column "id", :bigint, :default => 0, :null => false
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t.column "member_type", :nwr_enum, :null => false
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t.column "member_id", :bigint, :null => false
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t.column "member_role", :string
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t.column "version", :bigint, :default => 0, :null => false
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end
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add_primary_key "relation_members", %w[id version member_type member_id member_role]
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add_index "relation_members", %w[member_type member_id], :name => "relation_members_member_idx"
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create_table "relation_tags", :id => false do |t|
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t.column "id", :bigint, :default => 0, :null => false
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t.column "k", :string, :null => false, :default => ""
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t.column "v", :string, :null => false, :default => ""
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t.column "version", :bigint, :null => false
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end
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add_index "relation_tags", %w[id version], :name => "relation_tags_id_version_idx"
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create_table "relations", :id => false do |t|
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t.column "id", :bigint, :null => false, :default => 0
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t.column "user_id", :bigint, :null => false
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t.column "timestamp", :datetime, :null => false
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t.column "version", :bigint, :null => false
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t.column "visible", :boolean, :null => false, :default => true
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end
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add_primary_key "relations", %w[id version]
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add_index "relations", ["timestamp"], :name => "relations_timestamp_idx"
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end
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def self.down
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drop_table :relations
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drop_table :current_relations
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drop_table :relation_tags
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drop_table :current_relation_tags
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drop_table :relation_members
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drop_table :current_relation_members
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drop_enumeration :nwr_enum
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end
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end
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