Sometimes your Rails app may throw this error:
NoMethodError in Articles#show
undefined method `comment' for nil:NilClass
The cleanest workaround is to add
try(:field) </code> to your code, like:
<%= @article.try(:comment) %>
In some cases whereas information are such crucial and must-display like
Name</code> or Profile picture</code> it's crucial you put some validations on the model itself.