Ruby on Rails

i have a registration form ,i want to store data in corresponding user
table in that hobbies field
,i want to store all hobbies in one column so i take multiple check
boxes and store in one array
all checked values for that i am using below tag,but not working,please
any suggestion
<%= check_box(:user ,:hobbies,:value =>'Games') %>Games
<%= check_box :user , :hobbies,:value =>'Music' %>Music
<%= check_box :user , :hobbies,:value => 'Shopping'%>Shopping
the above user is table name ,hobbies is column name

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