Hi Ben,

Thanks for the reply. This is what I thought was the case, but I just 
wondered if there were any nice DM methods that I didn't know about that 
parsed strings in a certain format, ready to insert into the database as a 
Date object.

I've found that the jQuery datepicker gives the date in this format 
10/09/2012, so I have added the following method to the Song class to 
change it into a Date object:

  def released_on=date
    dates = date.split('/').map{ |s| s.to_i }
    super(Date.new(dates[2],dates[0],dates[1]))
  end

Not sure if that's the best way of doing it, but it certainly works!

thanks for the help and feedback!

DAZ


On Tuesday, October 9, 2012 8:14:23 PM UTC+1, benlovell wrote:
>
> On 9 October 2012 19:48, DAZ <daz...@gmail.com <javascript:>> wrote:
>
>> Thanks for the reply Ben.
>>
>> I think my question is more to do with DataMapper, because DataMapper 
>> requires the format to be a Date or DateTime object. My question is how I 
>> change what is effectively a string in the params hash into a date object 
>> in a neat way. Even if I used a date picker, I would assume that it sends 
>> some sort of string to the server rather than an actual Date object?
>>
>>
> In your example form you have three separate fields which you need to 
> parse into a valid Date. You cannot expect DM to do this on your behalf nor 
> should you. DM resources can parse date strings as properties of course, 
> but you need to massage your params to get the date into an acceptable
>  format. My point was that this would be a responsibility of your web 
> framework or front-end not DM.
>
> A similar example of this is the DateHelper.date_select in rails which 
> does some hocus pocus with param suffixes and Date::civil to get the values 
> from the three options into a proper date that AR can understand.
>
> Cheers,
> Ben
>  
>
>> Hope that clarifies my question - is there a neat way of converting dates 
>> to Date objects or is there just some donkey work that needs doing before 
>> creating the resource?
>>
>> cheers,
>>
>> DAZ
>>
>>
>>
>> On Sunday, October 7, 2012 2:07:30 PM UTC+1, benlovell wrote:
>>
>>> I think this question would be better served in whichever list pertains 
>>> to your chosen web framework (Sinatra I suspect?) but the simple answer is 
>>> to use one of the many available date pickers. 
>>>
>>> http://trentrichardson.com/**examples/timepicker/<http://trentrichardson.com/examples/timepicker/>
>>>
>>> Regards,
>>> Ben
>>>
>>> Sent from my iPhone
>>>
>>> On 7 Oct 2012, at 11:48, DAZ <daz...@gmail.com> wrote:
>>>
>>> I have a Song class that looks like this:
>>>
>>>   class Song
>>>     include DataMapper::Resource
>>>     property :id, Serial
>>>     property :title, String
>>>     property :lyrics, Text
>>>     property :length, Integer
>>>     property :released_on, Date
>>>   end
>>>
>>> Here's my form for creating it:
>>>
>>>   <form action="/songs" method="POST">
>>>     <input id="title" name="song[title]" type="text" />
>>>     <input id="length" name="song[length]" type="number" />
>>>     <input id="day" max="31" min="1" name="day" type="number" />
>>>     <input id="month" max="12" min="1" name="month" type="number" />
>>>     <input id="year" max="1998" min="1940" name="year" type="number" />
>>>     <textarea id="lyrics" name="song[lyrics]"></**textarea>
>>>     <input type="submit" value="Save Song" />
>>>   </form>
>>>
>>> I want to be able to create a new song resource by using
>>>
>>>   song = Song.create(params[:song])
>>>
>>> The problem I'm having is with the released_on property, since it needs 
>>> to be a Date object.
>>>
>>> At the moment, I am doing this:
>>>
>>>   date = Date.new(params[:year].to_i,**params[:month].to_i,params[:**
>>> day].to_i)
>>>   song = Song.create(params[:song].**merge(released_on: date))
>>>
>>> Does anybody know any nicer ways of entering a date into a form and 
>>> being able to simply call Song.create(params[:song]) without having to 
>>> manipulate the form parameters first?
>>>
>>> cheers,
>>>
>>> DAZ
>>>
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