Rails "any?" instance method callback?

How to receive the post's ID, if post is found via开发者_运维知识库 this '.any' call?

<% if @posts.any? {|p| p.title == my_title} %>

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You should probably do it like this:

<% if (post = @posts.detect {|p| p.title == my_title} ) %>
  Post ID: <%= post.id %>
<% end %>

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Any won't return anything except true or false.

http://www.ruby-doc.org/core/classes/Enumerable.html#M001500

if you want to something to be returned, use select

http://www.ruby-doc.org/core/classes/Enumerable.html#M001488

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Do something like the following, get the value if the condition is true. However the following way only set the post_id to the last matched post, if you want all of them, then set post_id as array:

<% post_id = nil%>
<% if @posts.any? {|p| post_id = p.id if p.title == my_title; p.title == my_title} %>