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In some cases, it doesn’t have tag argument just like this below.
So I put <%= tag + ‘,’ if tag %>, but it gets this error
ActionView::Template::Error (wrong number of arguments (0 for 1)):
How can I solve?
index.html.erb
<%= render 'layouts/social_like', :url => root_url, :title => @title %>
layouts/_social_like.html.erb
....
<a href="https://twitter.com/share" class="twitter-share-button" data-lang="en" data-hashtags="<%= tag + ',' if tag %>hash2,hash3,hash4">Tweet</a>
....
Inline if statements don’t really work well (at all?) in ERB. You can do this with a ternary operation: