Rails: time_select helper validation on previous given time? -

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i know if there built-in functionality of rails time_select, handles valid range of end_time.

i have start_time , end_time. end_time not allowed "smaller" start_time.

<%= f.time_select :start_time, {minute_step: 15}%>

how can realize this?

thank help.

it seems can't specify range via time_select. option cut end_time range using javascript based on start_time value , add custom validation reliability: http://guides.rubyonrails.org/active_record_validations.html#custom-methods.

def end_time_validity   if end_time < start_time     errors.add(:end_time, "can't before start time")   end end

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