Where clause generator

Usage example

Returning SQL

sql = Where.new('x=?',5).and( Where.new('x=?',6).or('x=?',7)).to_s`

returns (x=5) and ( ( x=6 ) or ( x=7 ) )

Building a complicated where clause made easy

 
def get_search_query_string
 
   where = Where.new
   where.and('users.first_name like ?', params[:search_first_name] + '%') unless params[:search_first_name].blank?
   where.and('users.last_name like ?', params[:search_last_name] + '%') unless params[:search_last_name].blank?
 
   status_where = Where.new
   for status in params[search_statuses].split(',')
     status_where.or 'status=?', status
   end
   where.and status_where unless status_where.blank?
 
   where.to_s
 end
 
User.find(:all, :conditions => get_search_query_string)`

Inline

User.find(:all, :conditions => Where.new('first_name like ?', 'Tim').and('last_name like ?', 'Harper') )

Sweet chaining action!

Author:

Tim Harper ( “timseeharperATgmail.seeom”.gsub(“see”, “c”).gsub(“AT”, “@”) )

Contributor:

Thiago Pradi (http://github.com/tchandy)