Module: EIVO::Concerns::Pagination

Extended by:
ActiveSupport::Concern
Included in:
Resources
Defined in:
app/controllers/eivo/concerns/pagination.rb

Instance Method Summary collapse

Instance Method Details

#paginate(collection, options = {}) ⇒ Object 



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# File 'app/controllers/eivo/concerns/pagination.rb', line 8

def paginate(collection, options = {})
  unless ::ActiveModel::Type::Boolean.new.cast(params[:pagination]) == false
    limit = 50
    if params[:limit]
      limit = [[params[:limit].to_i, 1].max, 500].min
    end

    collection = collection.page(params[:page]).per(limit)
    @serializer_options.merge!(pagination_options(collection))
  end

  collection
end

#pagination_options(collection) ⇒ Object 



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# File 'app/controllers/eivo/concerns/pagination.rb', line 22

def pagination_options(collection)
  options = {
    is_collection: true,
    links: {
      self: url_for(params.to_unsafe_h.merge(page: collection.current_page)),
      first: url_for(params.to_unsafe_h.merge(page: 1)),
    }
  }

  # avoid count request on large table
  if params[:pagination] == 'infinite'
    options[:links][:next] = url_for(params.to_unsafe_h.merge(page: collection.current_page + 1))

    if !collection.first_page?
      options[:links][:prev] = url_for(params.to_unsafe_h.merge(page: collection.current_page - 1))
    end
  else
    options[:links][:last] = url_for(params.to_unsafe_h.merge(page: collection.total_pages))
    options[:meta] = {
      total: collection.total_count,
      pages: collection.total_pages
    }

    if !collection.out_of_range? && !collection.last_page?
      options[:links][:next] = url_for(params.to_unsafe_h.merge(page: collection.next_page))
    end
    if !collection.out_of_range? && !collection.first_page?
      options[:links][:prev] = url_for(params.to_unsafe_h.merge(page: collection.prev_page))
    end
  end

  options
end