# Test Unit can't change data

**URL:** <https://www.ruby-forum.com/t/test-unit-cant-change-data/137127>\
**Category:** Rails\
**Created:** [May 9, 2008, 4:48am UTC](https://www.ruby-forum.com/t/test-unit-cant-change-data/137127 "2008-05-09T04:48:33Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![malioboro](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/eb8c5e/32.png) [@malioboro](https://www.ruby-forum.com/u/malioboro)\
**Post date:** [May 9, 2008, 4:48am UTC](https://www.ruby-forum.com/t/test-unit-cant-change-data/137127/1 "2008-05-09T04:48:33Z")

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I have converted my engine from myISAM to InnoDB, the matter now in Test  
Unit, the table cant do any changes for CRUD. Any advice? But if I  
convert it back, the CRUD can run very smooth and data value in  
attributes changed.

Reinhart  
[http://teapoci.blogspot.com](http://teapoci.blogspot.com)

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<div class="post-metadata">

**Author:** ![malioboro](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/eb8c5e/32.png) [@malioboro](https://www.ruby-forum.com/u/malioboro)\
**Post date:** [May 9, 2008, 8:45am UTC](https://www.ruby-forum.com/t/test-unit-cant-change-data/137127/2 "2008-05-09T08:45:56Z")

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On May 9, 3:48 am, Rails T. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)  
wrote:

> I have converted my engine from myISAM to InnoDB, the matter now in Test  
> Unit, the table cant do any changes for CRUD. Any advice? But if I  
> convert it back, the CRUD can run very smooth and data value in  
> attributes changed.

All changes made by a unit test are rolled back after the test (and  
default transaction isolation levels mean that you can’t see changes  
made by the test from another connection to mysql.