Complex django models.

[Alejandro Peralta]

Hello PyAMF Community,

I think I've asked this question in IRC. I blamed the ActionScript Mapping, but it is not working.

Below I've written a class hierarchy which uses django inheritance (not abstract) to build a dict like structure.
Trouble is when from the AIR frontend I send an instance of Dict, or Assoc, or DetailValue.
Django complains that the DetailValueInt (or DetailValuString which ever was the actual value) instance has
a detailvalue_ptr = None. I believe that pymaf is not setting this value to the corresponding instance of detailvalue.

Another problem is _sending_ a DetailValue instance because the DetailValueInt (or what ever class instance it should be), doesn't go with it in the 'detailvalueint' (or 'detailvaluestring'... or etc) that django creates as a reference from parent to child.

I was thinking that maybe I should add detailvalue_ptr atribute to all DetailValue* (where * is Int, String, Data..)
classes in the PyAMF mapping? Does PyAMF support this kind of thing. (Sorry to ask agian njoyce, I think you said "Yes" but I dont remember)

Cheers,
And Thanks
aleperalta

---------------------- PYTHON CODE -----------------------

# Warning this is not a working snippet just something
# I cut and pasted but shows what I'm doing

class Dict(models.Model):
    ...

class Assoc(models.Model):
 
    dict = models.ForeignKey(Dict)
    key = models.CharField(unique=True)
    value = models.ForeignKey('DetailValue')

class DetailValue(models.Model):

    TYPE_ATTR = {'I' : 'detailvalueint',
                 'F' : 'detailvaluefloat',
                 'D' : 'detailvaluedate',
                 'S' : 'detailvaluestring',}


    def value_attr(self, type_key):
        return getattr(self, self.TYPE_ATTR[type_key])

    def value(self, type_key):
         return self.value_attr(type_key).value

class DetailValueInt(DetailValue):
    value = models.IntegerField()

    def __unicode__(self):
        return '%d' % self.value

class DetailValueFloat(DetailValue):
    value = models.FloatField()

    def __unicode__(self):
        return '%f' % self.value

class DetailValueString(DetailValue):
    value = models.CharField(max_length=256)

    def __unicode__(self):
        return '%s' % self.value

class DetailValueDate(DetailValue):
    value = models.DateTimeField()

    def __unicode__(self):
        return '%s' % self.value


-------- AIR -------------------------------

[Bindable]
[RemoteClass(alias='com.appp.model.data.DetailValue')]
public class DetailValue
{
        private var _id:int;
        private var _value:Object;
       
        //test
        public var detailvalueint:int;
        public var detailvaluefloat:Number;
        public var detailvaluestring:String;
        public var detailvaluedate:Date;
       
        public function get value():Object
        {
                return this._value;
        }
        public function set value(arg:Object):void
        {
                this._value = arg;
        }
       
        public function get id():int
        {
                return this._id;
        }
               
        public function set id(arg:int):void
        {
                this._id = arg;
        }
}

package com.app.model.data
{
        [Bindable]
        [RemoteClass(alias='com.app.model.data.DetailValueInt')]
        public class DetailValueInt extends DetailValue
        {
                private var _value:int;

                public override function get value():Object
                {
                        return this._value;
                }
                public override function set value(arg:Object):void
                {
                        this._value = int(arg);
                }
               
                public function DetailValueInt()
                {
                }
        }
}
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