AssociationTypeMismatch with Expected Type on Nested Model Forms

Posted by Craig Walker on Stack Overflow See other posts from Stack Overflow or by Craig Walker
Published on 2010-05-24T19:51:41Z Indexed on 2010/05/24 21:11 UTC
Read the original article Hit count: 327

Filed under:

ruby-on-rails

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ruby

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exception

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nested-forms

I'm getting this exception when doing a nested model form:

ActiveRecord::AssociationTypeMismatch in RecipesController#update 
  Ingredient(#35624480) expected, got Ingredient(#34767560)

The models involved are Recipe and Ingredient. Recipe has_many and accepts_nested_attributes_for :ingredients, which belongs_to :recipe.

I get this exception when attempting to _destroy (=1) one of the preexisting Ingredients on a nested Ingredient form for the Recipe Edit/Update.

This makes very little sense, mostly because the association types are as expected (by the exception's own admission).

What makes even less sense is that it works just fine in a functional test.

Any ideas what might be causing this, or what I should be looking for?

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