# Problems with forms and more models

**URL:** <https://www.ruby-forum.com/t/problems-with-forms-and-more-models/124093>\
**Category:** Rails\
**Created:** [December 24, 2007, 4:54pm UTC](https://www.ruby-forum.com/t/problems-with-forms-and-more-models/124093 "2007-12-24T16:54:54Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![stratboy](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/838e76/32.png) [@stratboy](https://www.ruby-forum.com/u/stratboy)\
**Post date:** [December 24, 2007, 4:54pm UTC](https://www.ruby-forum.com/t/problems-with-forms-and-more-models/124093/1 "2007-12-24T16:54:54Z")

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class User \< Core  
has\_and\_belongs\_to\_many :regions  
end

class Region \< ActiveRecord::Base  
has\_and\_belongs\_to\_many :users  
end

I must to do a form with a multiple select to insert more regions for a  
user.  
i do so:

 Marche Veneto

in method called from action from i have this:  
@user=User.create(params[:user])

If i submit the form i receive an error.  
How i can insert rows in table regions\_users??  
Thanks

---

<div class="post-metadata">

**Author:** ![stratboy](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/838e76/32.png) [@stratboy](https://www.ruby-forum.com/u/stratboy)\
**Post date:** [December 25, 2007, 11:29pm UTC](https://www.ruby-forum.com/t/problems-with-forms-and-more-models/124093/2 "2007-12-25T23:29:58Z")

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just a thought without testing:

try changing

to

On Dec 24, 10:54 am, Luca R. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)