62 lines
1.4 KiB
Ruby
62 lines
1.4 KiB
Ruby
# frozen_string_literal: true
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class CommentMigration < ActiveRecord::Migration[4.2]
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def comments_up
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raise "Not implemented"
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end
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def up
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comments_up.each do |table|
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table[1].each do |column|
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table_name = table[0]
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column_name = column[0]
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comment = column[1]
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if column_name == :_table
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DB.exec "COMMENT ON TABLE #{table_name} IS ?", comment
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puts " COMMENT ON TABLE #{table_name}"
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else
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DB.exec "COMMENT ON COLUMN #{table_name}.#{column_name} IS ?", comment
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puts " COMMENT ON COLUMN #{table_name}.#{column_name}"
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end
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end
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end
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end
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def comments_down
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{}
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end
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def down
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replace_nils(comments_up)
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.deep_merge(comments_down)
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.each do |table|
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table[1].each do |column|
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table_name = table[0]
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column_name = column[0]
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comment = column[1]
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if column_name == :_table
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DB.exec "COMMENT ON TABLE #{table_name} IS ?", comment
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puts " COMMENT ON TABLE #{table_name}"
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else
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DB.exec "COMMENT ON COLUMN #{table_name}.#{column_name} IS ?", comment
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puts " COMMENT ON COLUMN #{table_name}.#{column_name}"
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end
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end
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end
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end
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private
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def replace_nils(hash)
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hash.each do |key, value|
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if Hash === value
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hash[key] = replace_nils value
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else
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hash[key] = nil
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end
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end
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end
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end
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