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This adds a programme column to vaccines, to change the relationship between programmes and vaccines to be one to many rather than many to many.
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Original file line number | Diff line number | Diff line change |
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# frozen_string_literal: true | ||
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class AddProgrammeToVaccines < ActiveRecord::Migration[7.2] | ||
def up | ||
add_reference :vaccines, :programme, foreign_key: true | ||
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Vaccine.all.find_each do |vaccine| | ||
vaccine.update!( | ||
programme: Programme.find_or_create_by!(type: vaccine.type) | ||
) | ||
end | ||
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||
change_column_null :vaccines, :programme_id, false | ||
end | ||
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||
def down | ||
remove_reference :vaccines, :programme | ||
end | ||
end |
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