在Rails中进行字符串插值

Question

How can I print the no:of comments to a particular post under it in rails?

<%=@post.comments.any? ? " " : "No comments yet!!" %> 

This is what I have done. Instead, if there are any comments for a particular post, I want to display it like "There are 5 comments" or something.

pls help.

Answer 1

Just print the number of comments:

<%= @post.comments.any? ? "#{@post.comments.size} comments" : "No comments yet!!" %>

NOTE 1: You can also use Rails helper for printing pluralized strings using pluralize :

<%= @post.comments.any? ? pluralize(@post.comments.size, "comment") : "No comments yet!!" %>

NOTE 2: Also, use .size instead of .count . Because size will count number of elements in your collection, whereas count will hit the database and count the rows in the database.