45 lines
1.6 KiB
Ruby
45 lines
1.6 KiB
Ruby
class CreateStockEvents < ActiveRecord::Migration[4.2]
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class StockEvent < ActiveRecord::Base; end
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class StockTaking < ActiveRecord::Base; end
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def change
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rename_table :deliveries, :stock_events
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rename_column :stock_changes, :delivery_id, :stock_event_id
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add_column :stock_events, :type, :string, default: 'Delivery', null: false
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reversible do |dir|
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dir.up do
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change_column_default :stock_events, :type, nil
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stock_event_max = StockEvent.maximum(:id) || 0
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stock_taking_min = StockTaking.minimum(:id) || 0
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diff = [stock_event_max + 1 - stock_taking_min, 0].max
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execute "UPDATE stock_changes SET stock_event_id = stock_taking_id + #{diff}
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WHERE stock_taking_id IS NOT NULL"
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execute "INSERT INTO stock_events (type, id, date, note, created_at)
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SELECT 'StockTaking', id + #{diff}, date, note, created_at FROM stock_takings"
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remove_column :stock_changes, :stock_taking_id
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drop_table :stock_takings
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end
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dir.down do
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create_table :stock_takings do |t|
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t.date :date
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t.text :note
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t.datetime :created_at
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end
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add_column :stock_changes, :stock_taking_id, :integer
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execute "INSERT INTO stock_takings (id, date, note, created_at)
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SELECT id, date, note, created_at FROM stock_events WHERE type = 'StockTaking'"
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execute "DELETE FROM stock_events WHERE type = 'StockTaking'"
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execute "UPDATE stock_changes SET stock_taking_id = stock_event_id, stock_event_id = NULL
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WHERE stock_event_id IN (SELECT id FROM stock_takings)"
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end
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end
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end
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end
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