Rails .count action with specific :id

Question

We have Questions and Answers, and every Question has_many :answers and those answers belongs_to :questions.

I want to display the CURRENT count of answers on the CURRENT Question.

i tried in my Answers_Controller :

def show
  @question = Question.find(params[:question_id])
  @answers_count = @question.answers.count
end

and then called on my view <%= @answers_count %>.

But i think i'm missing something here, because nothing is Displayed.

score 1 · Accepted Answer · answered Sep 25 '13 at 18:39

1

I found out that i don't need to call those in my Controller, i can instead just call

<%= @question.answers.count %>

answered Sep 25 '13 at 18:39

Mini John

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score 0 · Answer 2 · edited May 23 '17 at 12:01

0

Try changing:

@answers_count = Question.answers.count

to:

@answers_count = @question.answers.count

You are finding a particular question in your first line and assigning it to @question, but then are not querying that particular question (using Question instead of @question)

Also, look into the differences between count and size to make sure you are not querying the DB more than you have to -- this is a good discussion: ActiveRecord: size vs count

edited May 23 '17 at 12:01

Community

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answered Sep 25 '13 at 18:35

Jim

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Found it, i can call directly @question.answers.count. For some reason in the past this didnt worked and the aproach in my Question worked. Now it works simply like that. – Mini John Sep 25 '13 at 18:39

Rails .count action with specific :id

2 Answers2