Module: ProductFilters

Included in:
Taxon
Defined in:
lib/product_filters.rb

Overview

This module is included by Taxon. In development mode that inclusion does not happen until Taxon class is loaded. Ensure that Taxon class is loaded before you try something like Product.price_range_any

Class Method Summary collapse

Class Method Details

.all_taxons ⇒ Object

Filtering by the list of all taxons

Similar idea as above, but we don’t want the descendants’ products, hence it uses one of the auto-generated scopes from SearchLogic.

idea: expand the format to allow nesting of labels?



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# File 'lib/product_filters.rb', line 170

def ProductFilters.all_taxons
  taxons = Taxonomy.all.map {|t| [t.root] + t.root.descendants }.flatten
  { :name   => "All taxons",
    :scope  => :taxons_id_equals_any,
    :labels => taxons.sort_by(&:name).map {|t| [t.name, t.id]},
    :conds  => nil	# not needed
  }
end

.brand_filter ⇒ Object 



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# File 'lib/product_filters.rb', line 90

def ProductFilters.brand_filter
  brands = ProductProperty.where(:property_id => @@brand_property).map(&:value).compact.uniq
  conds  = Hash[*brands.map {|b| [b, "product_properties.value = '#{b}'"]}.flatten]
  { :name   => "Brands",
    :scope  => :brand_any,
    :conds  => conds,
    :labels => (brands.sort).map {|k| [k,k]}
  }
end

.price_filter ⇒ Object 



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# File 'lib/product_filters.rb', line 56

def ProductFilters.price_filter
  conds = [ [ "Under $10",    "price             <= 10" ],
            [ "$10 - $15",    "price between 10 and 15" ],
            [ "$15 - $18",    "price between 15 and 18" ],
            [ "$18 - $20",    "price between 18 and 20" ],
            [ "$20 or over",  "price             >= 20" ] ]
  { :name   => "Price Range",
    :scope  => :price_range_any,
    :conds  => Hash[*conds.flatten],
    :labels => conds.map {|k,v| [k,k]}
  }
end

.selective_brand_filter(taxon = nil) ⇒ Object 



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# File 'lib/product_filters.rb', line 124

def ProductFilters.selective_brand_filter(taxon = nil)
  if taxon.nil?
    taxon = Taxonomy.first.root
  end
  all_brands = ProductProperty.where(:property_id => @@brand_property).map(&:value).uniq
  scope = ProductProperty.scoped(:conditions => ["property_id = ?", @@brand_property]).
                          scoped(:joins      => {:product => :taxons},
                                 :conditions => ["taxons.id in (?)", [taxon] + taxon.descendants])
  brands = scope.map {|p| p.value}

  { :name   => "Applicable Brands",
    :scope  => :selective_brand_any,
    :conds  => Hash[*all_brands.map {|m| [m, "p_colour.value like '%#{m}%'"]}.flatten],
    :labels => brands.sort.map {|k| [k,k]}
  }
end

.taxons_below(taxon) ⇒ Object

Provide filtering on the immediate children of a taxon

This doesn’t fit the pattern of the examples above, so there’s a few changes. Firstly, it uses an existing scope which was not built for filtering - and so has no need of a conditions mapping, and secondly, it has a mapping of name to the argument type expected by the other scope.

This technique is useful for filtering on objects (by passing ids) or with a scope that can be used directly (eg. testing only ever on a single property).

This scope selects products in any of the active taxons or their children.



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# File 'lib/product_filters.rb', line 155

def ProductFilters.taxons_below(taxon)
  return ProductFilters.all_taxons if taxon.nil?
  { :name   => "Taxons under " + taxon.name,
    :scope  => :taxons_id_in_tree_any,
    :labels => taxon.children.sort_by(&:position).map {|t| [t.name, t.id]},
    :conds  => nil
  }
end