# Uninitialized constant LoadUserData::Fixtures

**URL:** <https://www.ruby-forum.com/t/uninitialized-constant-loaduserdata-fixtures/131637>\
**Category:** Rails\
**Created:** [March 12, 2008, 2:07am UTC](https://www.ruby-forum.com/t/uninitialized-constant-loaduserdata-fixtures/131637 "2008-03-12T02:07:09Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![xeno](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/x/e19b73/32.png) [@xeno](https://www.ruby-forum.com/u/xeno)\
**Post date:** [March 12, 2008, 2:07am UTC](https://www.ruby-forum.com/t/uninitialized-constant-loaduserdata-fixtures/131637/1 "2008-03-12T02:07:09Z")

</div>

I’m trying to follow the example on page 273 of Dave and David’s book,  
and I cannot get my yaml stuff loaded. I’ve tried several ways,  
including both singular and plural. It appears the book has a typo  
here because use of the plural in the migration command in the middle  
of the page gives you a plural class name LoadUsersData::Fixtures,  
which contradicts the singular one displayed below on the same page.  
I also got an error at one point about the _ **FILE** _ or **FILE**  
symbol (I still haven’t figured out if that’s two or three  
underscores, but both fail for me anyway…)

I’ve also noticed that “rails data migration” in google, nor anything  
similar I could think of, yields me examples of a load of data from  
YAML. Please let me know of such a simple example page. If I can get  
the thing going simply, I’m sure I can make progress from there.  
Thank you for any feedback.