Class: ActiveAdmin::Views::PaginatedCollection

Inherits:
Component
  • Object
show all
Includes:
Helpers::Collection, ActiveAdmin::ViewHelpers::DownloadFormatLinksHelper
Defined in:
lib/active_admin/views/components/paginated_collection.rb

Overview

Wraps the content with pagination and available formats.

Example:

paginated_collection collection, entry_name: "Post" do
  div do
    h2 "Inside the
  end
end

This will create a div with a sentence describing the number of posts in one of the following formats:

  • “No Posts found”

  • “Displaying all 10 Posts”

  • “Displaying Posts 1 - 30 of 31 in total”

It will also generate pagination links.

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from ActiveAdmin::ViewHelpers::DownloadFormatLinksHelper

#build_download_format_links

Methods included from Helpers::Collection

#collection_is_empty?, #collection_size

Instance Attribute Details

#collection ⇒ Object (readonly)

Returns the value of attribute collection.



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# File 'lib/active_admin/views/components/paginated_collection.rb', line 28

def collection
  @collection
end

Instance Method Details

#add_child(*args, &block) ⇒ Object

Override add_child to insert all children into the @contents div



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# File 'lib/active_admin/views/components/paginated_collection.rb', line 57

def add_child(*args, &block)
  if @built
    @contents.add_child(*args, &block)
  else
    super
  end
end

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

Builds a new paginated collection component

collection => A paginated collection from kaminari options => These options will be passed to ‘page_entries_info`

entry_name     => The name to display for this resource collection
params         => Extra parameters for pagination (e.g. { anchor: 'details' })
param_name     => Parameter name for page number in the links (:page by default)
download_links => Download links override (false or [:csv, :pdf])



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# File 'lib/active_admin/views/components/paginated_collection.rb', line 39

def build(collection, options = {})
  @collection     = collection
  @params         = options.delete(:params)
  @param_name     = options.delete(:param_name)
  @download_links = options.delete(:download_links)
  @display_total  = options.delete(:pagination_total) { true }
  @per_page       = options.delete(:per_page)

  unless collection.respond_to?(:total_pages)
    raise(StandardError, "Collection is not a paginated scope. Set collection.page(params[:page]).per(10) before calling :paginated_collection.")
  end

  @contents = div(class: "paginated_collection_contents")
  build_pagination_with_formats(options)
  @built = true
end

#build_pagination ⇒ Object (protected) 



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# File 'lib/active_admin/views/components/paginated_collection.rb', line 98

def build_pagination
  options = {}
  options[:params]     = @params     if @params
  options[:param_name] = @param_name if @param_name

  if !@display_total && collection.respond_to?(:offset)
    # The #paginate method in kaminari will query the resource with a
    # count(*) to determine how many pages there should be unless
    # you pass in the :total_pages option. We issue a query to determine
    # if there is another page or not, but the limit/offset make this
    # query fast.
    offset = collection.offset(collection.current_page * @per_page.to_i).limit(1).count
    options[:total_pages] = collection.current_page + offset
    options[:right] = 0
  end

  text_node paginate collection, options
end

#build_pagination_with_formats(options) ⇒ Object (protected) 



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# File 'lib/active_admin/views/components/paginated_collection.rb', line 67

def build_pagination_with_formats(options)
  div id: "index_footer" do
    build_per_page_select if @per_page.is_a?(Array)
    build_pagination
    div(page_entries_info(options).html_safe, class: "pagination_information")

    download_links = @download_links.is_a?(Proc) ? instance_exec(&@download_links) : @download_links

    if download_links.is_a?(Array) && !download_links.empty?
      build_download_format_links download_links
    else
      build_download_format_links unless download_links == false
    end
  end
end

#build_per_page_select ⇒ Object (protected) 



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# File 'lib/active_admin/views/components/paginated_collection.rb', line 83

def build_per_page_select
  div class: "pagination_per_page" do
    text_node "Per page:"
    select do
      @per_page.each do |per_page|
        option(
          per_page,
          value: per_page,
          selected: collection.limit_value == per_page ? "selected" : nil
        )
      end
    end
  end
end

#page_entries_info(options = {}) ⇒ Object (protected)

modified from will_paginate



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# File 'lib/active_admin/views/components/paginated_collection.rb', line 121

def page_entries_info(options = {})
  if options[:entry_name]
    entry_name   = options[:entry_name]
    entries_name = options[:entries_name] || entry_name.pluralize
  elsif collection_is_empty?
    entry_name   = I18n.t "active_admin.pagination.entry", count: 1, default: 'entry'
    entries_name = I18n.t "active_admin.pagination.entry", count: 2, default: 'entries'
  else
    key = "activerecord.models." + collection.first.class.model_name.i18n_key.to_s
    entry_name   = I18n.translate key, count: 1,               default: collection.first.class.name.underscore.sub('_', ' ')
    entries_name = I18n.translate key, count: collection.size, default: entry_name.pluralize
  end

  if @display_total
    if collection.total_pages < 2
      case collection_size
      when 0; I18n.t("active_admin.pagination.empty",    model: entries_name)
      when 1; I18n.t("active_admin.pagination.one",      model: entry_name)
      else;   I18n.t("active_admin.pagination.one_page", model: entries_name, n: collection.total_count)
      end
    else
      offset = (collection.current_page - 1) * collection.limit_value
      total  = collection.total_count
      I18n.t "active_admin.pagination.multiple",
             model: entries_name,
             total: total,
             from: offset + 1,
             to: offset + collection_size
    end
  else
    # Do not display total count, in order to prevent a `SELECT count(*)`.
    # To do so we must not call `collection.total_pages`
    offset = (collection.current_page - 1) * collection.limit_value
    I18n.t "active_admin.pagination.multiple_without_total",
           model: entries_name,
           from: offset + 1,
           to: offset + collection_size
  end
end