Rails find entries with specific atribute -

im rails beginner , tried list database entries specific attribute. in case number:string = '40829'. didnt worked out me, here controller:

def index     @ebms = ebm.find(params[:number => '40829']) end 

you should use where, so

ebm.where(number: '40829') 

or

ebm.find_by_number('40829') 

please read documentation active record query interface.