# Ar-extensions for multiple data importing

**URL:** <https://www.ruby-forum.com/t/ar-extensions-for-multiple-data-importing/164562>\
**Category:** Rails\
**Created:** [April 2, 2009, 4:45pm UTC](https://www.ruby-forum.com/t/ar-extensions-for-multiple-data-importing/164562 "2009-04-02T16:45:01Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![salil](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/c89c15/32.png) [@salil](https://www.ruby-forum.com/u/salil)\
**Post date:** [April 2, 2009, 4:45pm UTC](https://www.ruby-forum.com/t/ar-extensions-for-multiple-data-importing/164562/1 "2009-04-02T16:45:01Z")

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can we used ar-extensions with rails 1.0.2  
actually it works fine with rails 2.0.2 and activerecord-2.3.2 and  
activesupport-2.3.2.  
But when i am using it with rails 1.0.2 it gives me following error

undefined method `expand\_hash\_conditions\_for\_aggregates’ for  
#Class:0x6d0d670