rails 3 jQuery UI Datepicker只想启用特定日期

Question

I have a Registration model and form which uses a datepicker. I want the user to be only able to select dates which correspond to events (another model).

My problem is I can't find the right way to pass the event array to javascript.

this is in the controller:

@available_dates = Event.pluck(:start_time).as_json

this is in the view:

    <script>
       var availableDates = [<%= @available_dates.to_s.html_safe %>] ;
    </script>

and this is the js:

function available(date) {
    ymd = date.getFullYear() + "-" + ('0' + (date.getMonth()+1)).slice(-2) + "-" + ('0' + date.getDate()).slice(-2);
    console.log(ymd+' : '+($.inArray(ymd, availableDates)));
    if ($.inArray(ymd, availableDates) != -1) {
        return [true, "","Available"];
    } else {
        return [false,"","unAvailable"];
    }
}
$("#registration_date").datepicker({ beforeShowDay: available, dateFormat: "yy-mm-dd"});

I think I'm doing something wrong in the view since the js array seems to be empty looking at the console...

any help would be greatly appreciated

Answer 1

In the question comments you have mentioned @available_dates.to_s returns "[\\"2013-01-05\\", \\"2013-02-02\\", \\"2013-03-02\\"]" . This itself will render the array on the page so no need to "box it up" again.

Try changing the following line:

var availableDates = [<%= @available_dates.to_s.html_safe %>] ;

to this:

var availableDates = <%= @available_dates.to_s.html_safe %>;

Hope it helps.

If it doesn't you are either clearing the value of @available_dates somewhere further in your code or @available_dates is not available in the context of your view. Have your tried stepping through the code using debugger; ?