3123 configurable datepicker input value field

[mmsommer]

Added configurability to datepicker_input and filter_data_range_input as suggested in #3123

[shekibobo]

This does nothing to ensure the datepicker format matches the strftime format. The code to initialize the datepicker input:

  # jQuery datepickers (also evaluates dynamically added HTML)
  $(document).on 'focus', '.datepicker:not(.hasDatepicker)', ->
    defaults = dateFormat: 'yy-mm-dd'
    options = $(@).data 'datepicker-options'
    $(@).datepicker $.extend(defaults, options)

Any thoughts on how we could make sure those match up automatically? If you wanted to make your selected dates to match your I18n format, there would have to be some kind of conversion.

[mmsommer]

@shekibobo yes, that is true. Isn't there a possibility to transform a ruby format to a javascript format by using coffeescript?

[shekibobo]

There has been some discussion related to that point on #3000. I haven't come up with a solution yet, but would love your input.

[seanlinsley]

The test suite should start working again if you rebase on master.

[seanlinsley]

My bad, you'll need to rebase one more time.

[timoschilling]

Why do you use diverent keys in datepicker_input.rb (date.formats.default) and in application.js.coffee.erb (active_admin.datepickers.date_format)?

I think all should use the same key. There could be a config option like date_format_key.

[timoschilling]

this doesn't work, the application.js.coffee.erb is only compiled once and not for each locale