If csv file consists empty columns like this
,col_1,col_2,col_3,col_4,col_5,col_6
,1,112,1,100,130,4,8
it rases error Error: undefined method 'underscore' for nil:NilClass
Possible solution is to change prepare_headers method in Importer class like this
def prepare_headers
headers = self.headers.present? ? self.headers : yield
headers = headers.map(&:to_s)
@headers = headers.zip(headers.map { |el| el.underscore.gsub(/\s+/, '_') }).to_h.with_indifferent_access
@headers.merge!(options[:headers_rewrites].symbolize_keys.slice(*@headers.symbolize_keys.keys))
end
If csv file consists empty columns like this
it rases error
Error: undefined method 'underscore' for nil:NilClassPossible solution is to change prepare_headers method in Importer class like this