Module: Polivalente::TagsHelper

Defined in:
app/helpers/polivalente/tags_helper.rb

Instance Method Summary collapse

Instance Method Details

#tag_cloud(collection, classes) ⇒ Object

Returns a list of tags associated with the given collection.

A list of classes should be provided such that a class is assigned to a tag according to the number of times it occurs in the collection.

Example:

<% tag_cloud(Article.all, %w(s m l)) do |tag, klass| %>
  <%= link_to tag.name, tag_path(tag), class_names: (klass) %>
<% end %>

Produces:

<a class="s" href="/tags/news">news</a>
<a class="l" href="/tags/entertainment">entertainment</a>
<a class="l" href="/tags/video">video</a>
<a class="m" href="/tags/podcast">podcast</a>



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# File 'app/helpers/polivalente/tags_helper.rb', line 21

def tag_cloud(collection, classes)
  tags = collection.tag_counts(collection.pluck(:id))

  max = tags.sort_by(&:count).last

  tags.each do |tag|
    index = tag.count.to_f / max.count * (classes.size - 1)
    yield(tag, classes[index.round])
  end
end