In one particular Railcasts episode Ryan talks about advanced search and in that he uses some code so as to find the conditions for the search. As its working isn't explained I wanted some clarification regarding it.
def products
@products ||= find_products
end
private
def find_products
Product.find(:all, :conditions => conditions)
end
def keyword_conditions
["products.name LIKE ?", "%#{keywords}%"] unless keywords.blank?
end
def minimum_price_conditions
["products.price >= ?", minimum_price] unless minimum_price.blank?
end
def maximum_price_conditions
["products.price <= ?", maximum_price] unless maximum_price.blank?
end
def category_conditions
["products.category_id = ?", category_id] unless category_id.blank?
end
def conditions
[conditions_clauses.join(' AND '), *conditions_options]
end
def conditions_clauses
conditions_parts.map { |condition| condition.first }
end
def conditions_options
conditions_parts.map { |condition| condition[1..-1] }.flatten
end
def conditions_parts
private_methods(false).grep(/_conditions$/).map { |m| send(m) }.compact
end
I would welcome any information as to how this works especially the method products as he even calls it as products.name etc.