Rails convert datetime to date inwhere() - date

Question

I've got the following problem:
i need to convert a datetime field in a where select to a date field.
scope :after_start_date, lambda { |value| where('end_time <= (?)', value) if value}
I need something like where(end_time.to_date + " >= (?)", value)
Is there a nice way to do this?
Update/Example
08.09.2014 14:40 as DB_END_TIME
08.09.2014 AS PARAM_END_TIME
I wanna get all results which until the date 08.09.2014 (including the 8th),
but the comparison where(DB_END_TIME <= PARAM_END_TIME) does not include 08.09.2014
because the PARAM_END_TIME has 00:00:00 as time value.
And i think its not nice to do something like this:
PARAM_END_TIME + 1.day - 1.second - this would work.
So i'd like to convert the database value to the date format in the where statement.

Answer 1

you can use ruby strftime method to create ur own date/time display.
time.strftime( string ) => string
%a - The abbreviated weekday name (``Sun'')
%A - The full weekday name (``Sunday'')
%b - The abbreviated month name (``Jan'')
%B - The full month name (``January'')
%c - The preferred local date and time representation
%d - Day of the month (01..31)
%H - Hour of the day, 24-hour clock (00..23)
%I - Hour of the day, 12-hour clock (01..12)
%j - Day of the year (001..366)
%m - Month of the year (01..12)
%M - Minute of the hour (00..59)
%p - Meridian indicator (``AM'' or ``PM'')
%S - Second of the minute (00..60)
%U - Week number of the current year,
starting with the first Sunday as the first
day of the first week (00..53)
%W - Week number of the current year,
starting with the first Monday as the first
day of the first week (00..53)
%w - Day of the week (Sunday is 0, 0..6)
%x - Preferred representation for the date alone, no time
%X - Preferred representation for the time alone, no date
%y - Year without a century (00..99)
%Y - Year with century
%Z - Time zone name
%% - Literal ``%'' character
t = Time.now
t.strftime("Printed on %m/%d/%Y") #=> "Printed on 04/09/2003"
t.strftime("at %I:%M%p") #=> "at 08:56AM"
Example:
date = Date.parse('2014-09-08 00:00:00 UTC')
# => Mon, 08 Sep 2014
date.strftime('%d-%m-%Y')
# => "08-09-2014"
And search in database accordingly.. I hope this may helps you
Edit:
If you want to fetch data from your SQL Server and convert datetime to date then have a look at this