55 lines
1.7 KiB
Ruby
55 lines
1.7 KiB
Ruby
# frozen_string_literal: true
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module LegacyBulkInsert
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extend ActiveSupport::Concern
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class_methods do
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# Bulk inserts a number of rows into a table, optionally returning their
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# IDs.
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#
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# This method is deprecated, and you should use the BulkInsertSafe module
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# instead.
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#
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# table - The name of the table to insert the rows into.
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# rows - An Array of Hash instances, each mapping the columns to their
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# values.
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# return_ids - When set to true the return value will be an Array of IDs of
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# the inserted rows
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# disable_quote - A key or an Array of keys to exclude from quoting (You
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# become responsible for protection from SQL injection for
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# these keys!)
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# on_conflict - Defines an upsert. Values can be: :disabled (default) or
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# :do_nothing
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def legacy_bulk_insert(table, rows, return_ids: false, disable_quote: [], on_conflict: nil)
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return if rows.empty?
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keys = rows.first.keys
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columns = keys.map { |key| connection.quote_column_name(key) }
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disable_quote = Array(disable_quote).to_set
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tuples = rows.map do |row|
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keys.map do |k|
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disable_quote.include?(k) ? row[k] : connection.quote(row[k])
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end
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end
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sql = <<-EOF
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INSERT INTO #{table} (#{columns.join(', ')})
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VALUES #{tuples.map { |tuple| "(#{tuple.join(', ')})" }.join(', ')}
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EOF
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sql = "#{sql} ON CONFLICT DO NOTHING" if on_conflict == :do_nothing
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sql = "#{sql} RETURNING id" if return_ids
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result = connection.execute(sql)
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if return_ids
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result.values.map { |tuple| tuple[0].to_i }
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else
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[]
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end
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end
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end
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end
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