Rails difference in object created from a .find(:id) and .where() methods
tec = Technique.find(6)
tec2 = Technique.where(:korean => 'Jok Sul')

tec2 = Technique.where(:korean => 'Jok Sul').first

tec_scope = Technique.where(:korean => 'Jok Sul') # create an internal query

tec_scope.all # returns array
tec_scope.first # retuns one element

tec_objects = Technique.find(6) # explicitly runs a query and returns one object (in this case)

Technique.find([4,5]) # will return an array
Technique.find(4) # will return one object
Technique.where(:some_key => "some value").all # will return an array
Technique.where(:id => 5).first # will return one object