Add blocks to AR create and update

Updated patch with conforming more to rails conventions with blocks.

+1

+1

+1

Perhaps a tangent, but why not replace

object = new(attributes)

yield(object) if block_given?

object.save

object

with

returning new(attributes) do |object|

yield(object) if block_given?

object.save

end

Sure that would be nice. I was not sure how often 'returning' was being used in rails code. I thought of it more as for external use.

From greping the rails edge code I see there is some use of it. I am happy to change it to the returning convention if thats the way rails is going.

Added another patch which uses returning. I will let the core team decide what they prefer.

Thanks for the suggestion Matt.

Using returning reduces performance. Since create is a common operation, my suggestion might not be worth it.

I did wonder. I will let the core team decide based on what they know and would prefer. Both patches are there.

Patch updated using correct format.

Thanks David.