validates :place_id, :title, :level, :start_at, :end_at, :presence =>
true
validate :event_takes_place_in_one_day, :event_is_not_in_past
def event_takes_place_in_one_day
self.start_at.day == self.end_at.day
end
def event_is_not_in_past
admissible_range =
DateTime.now.beginning_of_day..DateTime.now.end_of_month
admissible_range.cover?(self.start_at) &&
admissible_range.cover?(self.end_at)
end
and bang! error when start_at or end_at is nil.
undefined method `to_datetime' for nil:NilClass
app/models/meeting.rb:22:in `cover?'
app/models/meeting.rb:22:in `event_is_not_in_past'
app/controllers/meetings_controller.rb:18:in `create'
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