During a one-to-many relationship, the attributes method is not available and the following error occurs:NoMethodError: undefined method `attributes' for #Answere::ActiveRecord_Associations_CollectionProxy

Asked 2 years ago, Updated 2 years ago, 93 views

The following relationship models are available:

class question
  has_many —answares
  accepts_nested_attributes_for —answares
end


class Answer
  belongs_to:question
end

Under these assumptions, within the controller,
@question.answares.attributes
When I try to do so,

NoMethodError: undefined method `attributes' for #Answere::ActiveRecord_Associations_CollectionProxy

The error appears.

※  ApplicationController is inherited.If you add a symbol, it doesn't display well, so it's omitted.

class QuestionsController
  @question.answares.attributes=answere_params

  private

  defanswere_params
    xxxxxxxx
  end
end

In a one-to-one relationship, you can use the attributes method, but in a one-to-many relationship like this, how is it common to implement it?

The implementation of answer_params has been verified during debugging, and there is no problem with its operation.
It contains the expected value, but I would like to eventually cram it into answer and save it.

If there are any deficiencies, I will supplement them.

Thank you for your cooperation.

ruby-on-rails ruby

2022-09-30 21:14

1 Answers

@question.answers will be a collection of answers, so if you want to get answers, you can call it as follows:

@question.answers.first.attributes

Also, there are several ways to add a new answer to @questions, but why not use build?

@[email protected](answer_params)
[email protected]
…
else
…
end 

Note: Rails Guide 4.3.1.14 collection.build(attributes={},...)


2022-09-30 21:14

If you have any answers or tips


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