32 lines
890 B
Ruby
32 lines
890 B
Ruby
# frozen_string_literal: true
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class ChangeLodgingAssociationToConference < ActiveRecord::Migration
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class TempConference < ApplicationRecord
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self.table_name = 'conferences'
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end
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class TempVenue < ApplicationRecord
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self.table_name = 'venues'
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end
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class TempLodging < ApplicationRecord
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self.table_name = 'lodgings'
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end
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def change
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add_column :lodgings, :conference_id, :integer
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TempLodging.reset_column_information
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# Change association from venue and conference
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TempConference.all.each do |conference|
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next unless TempVenue.exists?(conference_id: conference.id)
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venue = TempVenue.find_by(conference_id: conference.id)
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lodgings = TempLodging.where(venue_id: venue.id)
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lodgings.each do |lodging|
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lodging.update(conference_id: conference.id)
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end
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end
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remove_column :lodgings, :venue_id, :integer
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end
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end
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