Rails formatting date

Question

I am posting a date to an API and the required format is as follows   2014-12-01T01 29 18   I can get the date from the model like so   Model created at to s   That returns   2014-12-01 01 29 18 -0500   How can I use Rails or Ruby to format it like the required format with the T and removing the -0500

User · Accepted Answer

Use  Model created at strftime   FT T     where      F - The ISO 8601 date format   Y- m- d   T - 24-hour time   H  M  S    Following are some of the frequently used useful list of Date and Time formats that you could specify in strftime method   Date  Year  Month  Day      Y - Year with century  can be negative  4 digits at least            -0001  0000  1995  2009  14292  etc     C - year   100  round down   20 in 2009     y - year   100  00  99      m - Month of the year  zero-padded  01  12              m  blank-padded   1  12             -m  no-padded  1  12     B - The full month name    January                B  uppercased    JANUARY       b - The abbreviated month name    Jan                b  uppercased    JAN       h - Equivalent to  b     d - Day of the month  zero-padded  01  31             -d  no-padded  1  31     e - Day of the month  blank-padded   1  31      j - Day of the year  001  366   Time  Hour  Minute  Second  Subsecond      H - Hour of the day  24-hour clock  zero-padded  00  23     k - Hour of the day  24-hour clock  blank-padded   0  23     I - Hour of the day  12-hour clock  zero-padded  01  12     l - Hour of the day  12-hour clock  blank-padded   1  12     P - Meridian indicator  lowercase    am   or   pm       p - Meridian indicator  uppercase    AM   or   PM        M - Minute of the hour  00  59      S - Second of the minute  00  59      L - Millisecond of the second  000  999     N - Fractional seconds digits  default is 9 digits  nanosecond             3N  millisecond  3 digits             6N  microsecond  6 digits             9N  nanosecond  9 digits             12N picosecond  12 digits    For the complete list of formats for strftime method please visit APIDock

User · Answer

Since I18n is the Rails core feature starting from version 2 2 you can use its localize-method  By applying the forementioned strftime  -variables you can specify the desired format under config locales en yml  or whatever language   in your case like this   time    formats      default    FT T    Or if you want to use this kind of format in a few specific places you can refer it as a variable like this  time    formats      specific format    FT T    After that you can use it in your views like this   l Mode last created at  format   specific format

User · Answer

Create an initializer for it      config initializers time formats rb   Add something like this to it   Time  DATE FORMATS  custom datetime      d  m  Y    And then use it the following way   post updated at to s  custom datetime       Your have to restart rails server for this to work   Check the documentation for more information  http   api rubyonrails org v5 1 classes DateTime html method-i-to formatted s

User · Answer

Try this   created at strftime   FT T     It s a time formatting function which provides you a way to present the string representation of the date   http   ruby-doc org core-2 2 1 Time html method-i-strftime     From APIdock    Y m d             gt  20071119                  Calendar date  basic   F                 gt  2007-11-19                Calendar date  extended   Y- m              gt  2007-11                   Calendar date  reduced accuracy  specific month  Y                 gt  2007                      Calendar date  reduced accuracy  specific year  C                 gt  20                        Calendar date  reduced accuracy  specific century  Y j               gt  2007323                   Ordinal date  basic   Y- j              gt  2007-323                  Ordinal date  extended   GW V u            gt  2007W471                  Week date  basic   G-W V- u          gt  2007-W47-1                Week date  extended   GW V              gt  2007W47                   Week date  reduced accuracy  specific week  basic   G-W V             gt  2007-W47                  Week date  reduced accuracy  specific week  extended   H M S             gt  083748                    Local time  basic   T                 gt  08 37 48                  Local time  extended   H M               gt  0837                      Local time  reduced accuracy  specific minute  basic   H  M              gt  08 37                     Local time  reduced accuracy  specific minute  extended   H                 gt  08                        Local time  reduced accuracy  specific hour  H M S  L          gt  083748 000                Local time with decimal fraction  comma as decimal sign  basic   T  L              gt  08 37 48 000              Local time with decimal fraction  comma as decimal sign  extended   H M S  L          gt  083748 000                Local time with decimal fraction  full stop as decimal sign  basic   T  L              gt  08 37 48 000              Local time with decimal fraction  full stop as decimal sign  extended   H M S z           gt  083748-0600               Local time and the difference from UTC  basic   T  z              gt  08 37 48-06 00            Local time and the difference from UTC  extended   Y m dT H M S z    gt  20071119T083748-0600      Date and time of day for calendar date  basic   FT T  z           gt  2007-11-19T08 37 48-06 00 Date and time of day for calendar date  extended   Y jT H M S z      gt  2007323T083748-0600       Date and time of day for ordinal date  basic   Y- jT T  z        gt  2007-323T08 37 48-06 00   Date and time of day for ordinal date  extended   GW V uT H M S z   gt  2007W471T083748-0600      Date and time of day for week date  basic   G-W V- uT T  z    gt  2007-W47-1T08 37 48-06 00 Date and time of day for week date  extended   Y m dT H M        gt  20071119T0837             Calendar date and local time  basic   FT R              gt  2007-11-19T08 37          Calendar date and local time  extended   Y jT H MZ         gt  2007323T0837Z             Ordinal date and UTC of day  basic   Y- jT RZ          gt  2007-323T08 37Z           Ordinal date and UTC of day  extended   GW V uT H M z     gt  2007W471T0837-0600        Week date and local time and difference from UTC  basic   G-W V- uT R  z    gt  2007-W47-1T08 37-06 00    Week date and local time and difference from UTC  extended

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