CODEWITHSUNDEEP
ruby-on-railsruby
Hacktacus
Hacktacus

Reputation: 131

Rails output html after evaluating each value in an array

I am writing a helper method for my rails views. After evaluating each value in an array I want to output a button to the html. However, 'puts' is not working and 'return' will work only for one value and end the operator there only.

def show_power_buttons
    levels = [1, 2, 3, 4, 5]

    levels.each do |level|
        count = @player.powers.where(level: level).count
        if count > 0
            puts (link_to level, '#', :class => 'btn btn-primary')
        end
    end
end

I know I am missing something very obvious but unable to figure it out.

Upvotes: 0

Views: 277

Answers (2)

Nermin
Nermin

Reputation: 6100

each returns array on which you have called it, it does not return result of the block.

You can use map to make this work

def show_power_buttons
  levels = [1, 2, 3, 4, 5]

  levels.map do |level|
    count = @player.powers.where(level: level).count        
    (link_to level, '#', :class => 'btn btn-primary') if count > 0
  end.compact.join('\n').html_safe
end

compact will discard all nil values, we then use join because this is still array, you can join it or can use it this way and in your view just say:

def show_power_buttons
  levels = [1, 2, 3, 4, 5]

  levels.map do |level|
    count = @player.powers.where(level: level).count        
    (link_to level, '#', :class => 'btn btn-primary') if count > 0
  end.compact # returns array of string that are links
end

<%= show_power_buttons.each do |pw| %>
  <%= pw.html_safe %>
<% end %>

You have to use html safe, because it will convert string to html

Upvotes: 3

Grych
Grych

Reputation: 2901

Collect the return value and return it at the end of the method:

def show_power_buttons
    levels = [1, 2, 3, 4, 5]
    retval = []
    levels.each do |level|
        count = @player.powers.where(level: level).count
        if count > 0
            retval << link_to level, '#', :class => 'btn btn-primary'
        end
    end
    return retaval 
end

It will output the arrach of links.

Upvotes: 1

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