53 lines
1.3 KiB
Ruby
53 lines
1.3 KiB
Ruby
require_relative '../../migration_helpers'
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module RuboCop
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module Cop
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module Migration
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# Cop that checks if columns are added in a way that doesn't require
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# downtime.
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class AddColumn < RuboCop::Cop::Cop
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include MigrationHelpers
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WHITELISTED_TABLES = [:application_settings].freeze
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MSG = '`add_column` with a default value requires downtime, ' \
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'use `add_column_with_default` instead'.freeze
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def on_send(node)
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return unless in_migration?(node)
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name = node.children[1]
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return unless name == :add_column
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# Ignore whitelisted tables.
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return if table_whitelisted?(node.children[2])
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opts = node.children.last
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return unless opts && opts.type == :hash
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opts.each_node(:pair) do |pair|
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if hash_key_type(pair) == :sym && hash_key_name(pair) == :default
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add_offense(node, location: :selector)
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end
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end
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end
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def table_whitelisted?(symbol)
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symbol && symbol.type == :sym &&
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WHITELISTED_TABLES.include?(symbol.children[0])
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end
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def hash_key_type(pair)
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pair.children[0].type
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end
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def hash_key_name(pair)
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pair.children[0].children[0]
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end
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end
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end
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end
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end
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