RoR: How to define a method for a partial?

Question

I am trying to render a partial on a page...like so

../devise/sessions/new.html.erb

<%= render partial: '/tweets/latest_tweets' %>

All good

In the partial I would like to do "each do" like so...

../tweets/_latest_tweets.html.erb

<% @tweets.each do |tweet| %>
 <%= tweet.content %>
<% end %>

I get undefined method `each' for nil:NilClass

How do I define this method for my partial in my tweets controller?

I have index like so

tweets_controller.rb

    def index
        @tweets = Tweet.all
    end

Which is fine for the index but I don't know how to do same for my partial (I tried just defining my partial like the index but that did not seem to work)

Anyone have a solution I could try?

ty

Answer 1

You need to pass the collection when rendering the partial. It'll give something like this:

devise/sessions/new.html.erb

<%= render partial: 'tweets/latest_tweets', collection: @tweets, as: :tweet %>

tweets/_latest_tweets.html.erb

<%= tweet.content %>

Just like that, and it will iterate through your collection automatically.

Fore more info, please read Rails - Layout and Rendering