47 lines
1.1 KiB
Ruby
47 lines
1.1 KiB
Ruby
class ActiveRecord::Base
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# Execute SQL manually
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def self.exec_sql(*args)
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conn = ActiveRecord::Base.connection
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sql = ActiveRecord::Base.send(:sanitize_sql_array, args)
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conn.execute(sql)
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end
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def self.exec_sql_row_count(*args)
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exec_sql(*args).cmd_tuples
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end
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def self.sql_fragment(*sql_array)
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ActiveRecord::Base.send(:sanitize_sql_array, sql_array)
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end
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def exec_sql(*args)
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ActiveRecord::Base.exec_sql(*args)
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end
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# Executes the given block +retries+ times (or forever, if explicitly given nil),
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# catching and retrying SQL Deadlock errors.
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#
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# Thanks to: http://stackoverflow.com/a/7427186/165668
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#
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def self.retry_lock_error(retries=5, &block)
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begin
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yield
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rescue ActiveRecord::StatementInvalid => e
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if e.message =~ /deadlock detected/ && (retries.nil? || retries > 0)
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retry_lock_error(retries ? retries - 1 : nil, &block)
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else
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raise e
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end
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end
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end
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# Support for psql. If we want to support multiple RDBMs in the future we can
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# split this.
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def exec_sql_row_count(*args)
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exec_sql(*args).cmd_tuples
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end
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end
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