Class: Listpress::DefaultResolver

Inherits:
Object
  • Object
show all
Defined in:
lib/listpress/default_resolver.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(collection, listing) ⇒ DefaultResolver

Returns a new instance of DefaultResolver.



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# File 'lib/listpress/default_resolver.rb', line 5

def initialize(collection, listing)
  @collection = collection
  @listing = listing
end

Instance Attribute Details

#listing ⇒ Object (readonly)

Returns the value of attribute listing.



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# File 'lib/listpress/default_resolver.rb', line 3

def listing
  @listing
end

Instance Method Details

#collection ⇒ Object 



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# File 'lib/listpress/default_resolver.rb', line 65

def collection
  @_collection_cache ||= page(sort(filter(@collection)))
end

#filter(collection) ⇒ Object

apply filters to collection



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# File 'lib/listpress/default_resolver.rb', line 11

def filter(collection)
  # skip filters if we need to retrieve a specific item
  return collection.where(id: listing.params[:item_id]) if listing.params[:item_id]

  listing.filters.each do |filter|
    val = listing.filter_value(filter[:name])

    next if val.nil? || val == ""  # beware of false (valid filter value)

    if filter[:proc]
      collection = filter[:proc].call(collection, val)
    elsif filter[:method]
      collection = collection.public_send(filter[:method], val)
    elsif filter[:column]
      collection = collection.where(filter[:column] => val)
    else
      if collection.respond_to?(filter[:name]) && !collection.model.column_names.include?(filter[:name].to_s)
        collection = collection.public_send(filter[:name], val)
      elsif
      collection = collection.where(filter[:name] => val)
      end
    end
  end

  collection
end

#page(collection) ⇒ Object 



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# File 'lib/listpress/default_resolver.rb', line 57

def page(collection)
  if listing.paginate? && !listing.item_refresh?
    collection = collection.paginate(page: listing.params[:page] || 1, per_page: listing.options[:per_page])
  end

  collection
end

#sort(collection) ⇒ Object

apply sort to collection



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# File 'lib/listpress/default_resolver.rb', line 39

def sort(collection)
  attr, dir = listing.sort
  if attr && column = listing.columns.detect {|c| c[:attr] == attr}
    case column[:sort]
    when true
      collection = collection.order(attr => dir)
    when Symbol, String
      collection = collection.order(column[:sort] => dir)
    when Hash
      collection = collection.order(column[:sort][dir] || (raise ArgumentError, "When using hash as a :sort option for a column, :asc and :desc keys are expected."))
    else
      # do not sort
    end
  end

  collection
end