47 lines
1.2 KiB
Ruby
47 lines
1.2 KiB
Ruby
# frozen_string_literal: true
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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 prevents adding columns to wide tables.
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class AddColumnsToWideTables < RuboCop::Cop::Cop
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include MigrationHelpers
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MSG = '`%s` is a wide table with several columns, adding more should be avoided unless absolutely necessary.' \
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' Consider storing the column in a different table or creating a new one.'
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BLACKLISTED_METHODS = %i[
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add_column
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add_reference
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add_timestamps_with_timezone
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].freeze
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def on_send(node)
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return unless in_migration?(node)
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method_name = node.children[1]
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table_name = node.children[2]
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return unless offense?(method_name, table_name)
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add_offense(node, location: :selector, message: format(MSG, table_name.value))
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end
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private
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def offense?(method_name, table_name)
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wide_table?(table_name) &&
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BLACKLISTED_METHODS.include?(method_name)
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end
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def wide_table?(table_name)
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table_name && table_name.type == :sym &&
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WIDE_TABLES.include?(table_name.value)
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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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