I see now. Since it can be hash it's looking trying to convert 'test' (in
my hash) into an integer. Thanks.
--Brett
On Tuesday, September 10, 2013 7:54:15 AM UTC-7, Frederick Cheung wrote:
>
>
>
> On Monday, September 9, 2013 11:16:14 PM UTC+1, Brett Pontarelli wrote:
>>
>> Below is an example of the error I encountered in my project today and
>> after a great deal of searching I realized the problem to be that the *
>> _attributes needs to be an array! My first question is, is there a use
>> for *_attributes={} and is there something I'm missing to make it work
>> in that case? If not, then what *should* the behavior be? Should it be
>> allowed and instead create one record (a letter for example)? Thanks.
>>
>> it should either be an array or a hash where the keys are indices e.g.
>
> {'1' => {'test' => 'foo'}, '2' => {'test' => 'bar'}, ...}
>
> The expected format is documented:
> http://apidock.com/rails/v3.2.13/ActiveRecord/NestedAttributes/assign_nested_attributes_for_collection_association
> The keys in this top level hash are irrelevant
>
>>
> Fred
>
> Setup a simple rails app:
>>
>> class Word < ActiveRecord::Base
>> has_many :letters, dependent: :destroy
>> accepts_nested_attributes_for :letters
>> end
>>
>> class Letter < ActiveRecord::Base
>> belongs_to :word
>> end
>>
>> This works just fine (e.g. in the console):
>>
>> attrs = { 'letters_attributes' => [{ 'test' => '1' }] }
>> Word.new attrs
>>
>> But this give an error:
>>
>> attrs = { 'letters_attributes' => { 'test' => '1' } }
>> Word.new attrs
>>
>> and the output looks something like:
>>
>> TypeError: no implicit conversion of Symbol into Integer
>> from /../active_record/nested_attributes.rb:452:in `[]'
>> from /../active_record/nested_attributes.rb:452:in `block in
>> assign_nested_attributes_for_collection_association'
>> from /../active_record/nested_attributes.rb:452:in `map'
>> from /../active_record/nested_attributes.rb:452:in
>> `assign_nested_attributes_for_collection_association'
>> from /../active_record/nested_attributes.rb:339:in `letters_attributes='
>> from /../active_record/attribute_assignment.rb:42:in `public_send'
>> from /../active_record/attribute_assignment.rb:42:in `_assign_attribute'
>> from /../active_record/attribute_assignment.rb:53:in `block in
>> assign_nested_parameter_attributes'
>> from /../active_record/attribute_assignment.rb:53:in `each'
>> from /../active_record/attribute_assignment.rb:53:in
>> `assign_nested_parameter_attributes'
>> from /../active_record/attribute_assignment.rb:33:in `assign_attributes'
>> from /../active_record/core.rb:192:in `initialize'
>> from /../active_record/inheritance.rb:27:in `new'
>> from /../active_record/inheritance.rb:27:in `new'
>>
>>
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