Hi All,
It works by blocking it with the single quote. :)
Thanks for the help.
Cheers,
Setiaman
On Jul 16, 2012 2:44 AM, "yarko" <yark...@gmail.com> wrote:
>
>
> On Sunday, July 15, 2012 9:02:39 AM UTC-5, Setiaman wrote:
>>
>> Hi,
>>
>> I want to implement hierarchy data model which is quite common in
>> Relational Data Model.
>>
>> Let's say I have Employee model which has the relation to the boss which
>> link to the employee model itself.
>> It will look like this:
>>
>> class Employee(models.Model):
>> empname = models.CharField(max_length=**60)
>> boss = models.ForeignKey(Employee)
>>
>
> Employee is in the middle of being defined when you make this reference, so
> ... try something like:
>
> boss = models.ForeignKey('Employee') # delayed evaluation
>
> or:
>
> boss = models.ForeignKey('self') # I think this reads nicer
>
> See https://docs.djangoproject.com/en/dev/ref/models/fields/#foreignkey
>
>> salary = models.integer()
>>
>>
>> Sample Data:
>>
>> ID empname boss salary
>> ------------------------------**--------------------
>> 1 albert null 10000
>> 2 bert 1 5000
>> 3 Chuck 1 5000
>> 4 Donna 3 3000
>> 5 Jack 3 2000
>>
>> Albert is the root with Bert and Chuck under him and Chuck has Donna and
>> Jack under him.
>>
>> I got an error when I tried to sync to the database where Django telling
>> me that the employee is not exist in the Foreign key part.
>> Is there any way to manipulate this situation?
>>
>> Cheers,
>> Setiaman
>>
>
>
> Regards,
> Yarko
>
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