ruby on rails - Check Select year parameter -

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i have select year wanna check if year matches:

<%= select_year(date.today, {start_year: 2015, end_year: date.today.year} %>

the default name date[year] , wanna compare value in query like:

where("year(date) = ?", x)

where x year, can't work. i'm passing controller like:

@result = model.function(params[:date][:year])

but keep getting "undefined method `[]' nil:nilclass" though see passing "parameters: {"utf8"=>"✓", "date"=>{"year"=>"2015"}}"


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