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Contents
# *ProductScope* is model for storing named scopes with their arguments,
# to be used with ProductGroups.
#
# Each product Scope can be applied to Product (or product scope) with #apply_on method
# which returns new combined named scope
#
class ProductScope < ActiveRecord::Base
# name
# arguments
belongs_to :product_group
serialize :arguments
validate :check_validity_of_scope
extend ::Scopes::Dynamic
# Get all products with this scope
def products
if Product.condition?(self.name)
Product.send(self.name, *self.arguments)
end
end
# Applies product scope on Product model or another named scope
def apply_on(another_scope)
another_scope.send(self.name, *self.arguments)
end
before_validation(:on => :create) {
# Add default empty arguments so scope validates and errors aren't caused when previewing it
if name && args = Scopes::Product.arguments_for_scope_name(name)
self.arguments ||= ['']*args.length
end
}
# checks validity of the named scope (if its safe and can be applied on Product)
def check_validity_of_scope
errors.add(:name, "is not a valid scope name") unless Product.condition?(self.name)
apply_on(Product).limit(0) != nil
rescue Exception
errors.add(:arguments, "are incorrect")
end
# test ordering scope by looking for name pattern or missed arguments
def is_ordering?
name =~ /^(ascend_by|descend_by)/ || arguments.blank?
end
def to_sentence
result = I18n.t(:sentence, :scope => [:product_scopes, :scopes, self.name], :default => "")
result = I18n.t(:name, :scope => [:product_scopes, :scopes, self.name]) if result.blank?
result % [*self.arguments]
end
def to_s
to_sentence
end
end
Version data entries
9 entries across 9 versions & 1 rubygems