41 lines
1.6 KiB
Ruby
41 lines
1.6 KiB
Ruby
class KeyConstraints < ActiveRecord::Migration
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def self.up
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# Primary keys
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add_primary_key :current_node_tags, [:id, :k]
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add_primary_key :current_way_tags, [:id, :k]
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add_primary_key :current_relation_tags, [:id, :k]
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add_primary_key :node_tags, [:id, :version, :k]
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add_primary_key :way_tags, [:id, :version, :k]
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add_primary_key :relation_tags, [:id, :version, :k]
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add_primary_key :nodes, [:id, :version]
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# Foreign keys (between ways, way_tags, way_nodes, etc.)
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add_foreign_key :current_node_tags, [:id], :current_nodes
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add_foreign_key :node_tags, [:id, :version], :nodes
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add_foreign_key :current_way_tags, [:id], :current_ways
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add_foreign_key :current_way_nodes, [:id], :current_ways
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add_foreign_key :way_tags, [:id, :version], :ways
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add_foreign_key :way_nodes, [:id, :version], :ways
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add_foreign_key :current_relation_tags, [:id], :current_relations
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add_foreign_key :current_relation_members, [:id], :current_relations
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add_foreign_key :relation_tags, [:id, :version], :relations
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add_foreign_key :relation_members, [:id, :version], :relations
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# Foreign keys (between different types of primitives)
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add_foreign_key :current_way_nodes, [:node_id], :current_nodes, [:id]
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# FIXME: We don't have foreign keys for relation members since the id
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# might point to a different table depending on the `type' column.
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# We'd probably need different current_relation_member_nodes,
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# current_relation_member_ways and current_relation_member_relations
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# tables for this to work cleanly.
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end
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def self.down
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raise IrreversibleMigration.new
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end
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end
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