CODEWITHSUNDEEP
ruby-on-railsrubyruby-on-rails-4haml
Melbourne2991
Melbourne2991

Reputation: 11797

If respond_to? not returning anything

I have a bit of code that is supposed to be checking whether or not a method call exists for an attribute, it seems neither the if or else are returning anything...

%h2= @post.title
    .row                    
        .col-sm-12
            = render "blog_meta", :post => @post
            #text_body
                = @post.content
            %hr
            - if @post.comments.count > 0
                %h2 Comments
                #comments
                    - @post.comments.where(:original_id => nil).each do |comment| 
                        .comment
                            .profile
                                %img{:src => "/assets/profile_image_sample.jpg"}
                            .message
                                .username
                                    - if comment.user.respond_to?('username')
                                        .username= comment.user.username
                                    - else
                                        .username= comment.user.first_name
                                = comment.content
                                - logger.info "LOGGER--->>" + comment.user.first_name
                                .reply-link
                                    %a{:href => "#"} Reply to Comment
                        - if comment.replies.count > 0
                            - nesting = 0
                            - comment.replies.each do |comment|
                                = render "comment", :comment => comment, :nesting => nesting
                %hr
            = render "submit_comment"

However if I simply = comment.user.first_name with no conditionals then it works fine..

Upvotes: 0

Views: 128

Answers (1)

tihom
tihom

Reputation: 8003

most likely the user responds to username but it is blank or nil. You might want to do this instead

    - if comment.user.username.blank?
        .username= comment.user.first_name
    - else
        .username= comment.user.username

respond_to is used to check if a method is defined for the object. It will return true if the method is defined for the object. It does not concern what the output of that method is.

Upvotes: 2

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