我正在将电子表格中的数据导入应用程序数据库。
数据按行解析。每个解析的行看起来像：
{:department=>{
:school=>"Graduate School of Business",
:name=>"Graduate School of Business",
:program=>"MBA Program",
:url=>"http://www.gsb.stanford.edu/mba",
:intro=>"The Stanford MBA Program is a two-year, full-time, residential program.",
:students_number=>"Approximately 80 annually",
:students_with_aids_number=>nil,
:gre_scroe=>nil,
:toefl_score=>nil,
:world_rank=>nil,
:us_rank=>nil,
:without_aid_deadline=>nil,
:with_aid_deadline=>nil,
:salary=>nil,
:institute_id=>1}
}
创建部门：
# att is the hash shown above
department = Department.new(department_params(att))
if !department.save
puts "Error: \n department can't be save: #{department.errors.full_messages}"
end
def department_params params
params.require(:department).permit(:name,:url,:institute_id)
end
但我得到了错误：
no implicit conversion of Symbol into String
这指向
params.require(:department).permit(:name,:url,:institute_id)
我该如何解决？谢谢！