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51 lines
1.6 KiB
Ruby
51 lines
1.6 KiB
Ruby
# frozen_string_literal: true
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# Fix an issue with `LIMIT` ocurring on the left side of a `UNION` causing syntax errors.
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# See https://github.com/rails/rails/issues/40181
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# The fix has been merged in ActiveRecord: https://github.com/rails/rails/pull/51549
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# TODO: drop this when available in ActiveRecord
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# rubocop:disable all -- This is a mostly vendored file
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module Arel
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module Visitors
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class ToSql
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private
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def infix_value_with_paren(o, collector, value, suppress_parens = false)
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collector << "( " unless suppress_parens
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collector = if o.left.class == o.class
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infix_value_with_paren(o.left, collector, value, true)
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else
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select_parentheses o.left, collector, false # Changed from `visit o.left, collector`
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end
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collector << value
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collector = if o.right.class == o.class
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infix_value_with_paren(o.right, collector, value, true)
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else
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select_parentheses o.right, collector, false # Changed from `visit o.right, collector`
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end
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collector << " )" unless suppress_parens
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collector
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end
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def select_parentheses(o, collector, always_wrap_selects = true)
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if o.is_a?(Nodes::SelectStatement) && (always_wrap_selects || require_parentheses?(o))
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collector << "("
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visit o, collector
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collector << ")"
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collector
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else
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visit o, collector
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end
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end
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def require_parentheses?(o)
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!o.orders.empty? || o.limit || o.offset
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end
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end
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end
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end
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# rubocop:enable all
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