nil：NilClass的未定义方法'strftime'-有时显示

Question

I'm building a simple app for displaying movies using themoviedb gem. However, when I try to do a search query, it displays the error I mentioned. Now, that doesn't happen every time - only in certain cases (eg Matrix works fine, but Fight Club shows the error)

Here's my code:

<% @movie.each do |movie| %>
<%= link_to movie_path(movie.id) do %>
<%= image_tag("#{@configuration.base_url}w154#{movie.poster_path}") if movie.poster_path %>
<% end %>
<div class="moviesindex">
<%= link_to movie.title, movie_path(movie.id) %>
(<%= movie.release_date.to_date.strftime("%Y") %>) <br />
</div>
<% end %>

Answer 1

Be forgiving for realease_date if movie.release_date can be nil at times using try :

<%= movie.release_date.try(:year) %>

This will give you release year if release_date is valid and gives you nil if release_date is nil.

Since release_date , I assume is already either a Date or DateTime or ActiveSupport::TimeWithZone , the to_date is not necessary. Also I think date.year is more cleaner than date.strftime("%Y") .