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Document that lock_version column is integer
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@ -14,7 +14,7 @@ module ActiveRecord
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# == Usage
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#
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# Active Record supports optimistic locking if the +lock_version+ field is present. Each update to the
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# record increments the +lock_version+ column and the locking facilities ensure that records instantiated twice
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# record increments the integer column +lock_version+ and the locking facilities ensure that records instantiated twice
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# will let the last one saved raise a +StaleObjectError+ if the first was also updated. Example:
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#
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# p1 = Person.find(1)
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