56 lines
1.5 KiB
Ruby
56 lines
1.5 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 enforces using text instead of the string data type
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class PreventStrings < RuboCop::Cop::Cop
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include MigrationHelpers
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MSG = 'Do not use the `string` data type, use `text` instead. ' \
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'Updating limits on strings requires downtime. This can be avoided ' \
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'by using `text` and adding a limit with `add_text_limit`'
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def_node_matcher :reverting?, <<~PATTERN
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(def :down ...)
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PATTERN
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def on_def(node)
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return unless in_migration?(node)
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# Don't enforce the rule when on down to keep consistency with existing schema
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return if reverting?(node)
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node.each_descendant(:send) do |send_node|
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next unless string_operation?(send_node)
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add_offense(send_node, location: :selector)
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end
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end
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private
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def string_operation?(node)
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# Don't complain about string arrays
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return false if array_column?(node)
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modifier = node.children[0]
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migration_method = node.children[1]
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if migration_method == :string
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modifier.type == :lvar
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elsif ADD_COLUMN_METHODS.include?(migration_method)
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modifier.nil? && string_column?(node.children[4])
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end
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end
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def string_column?(column_type)
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column_type.type == :sym && column_type.value == :string
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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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