Re: Problem with safedelete implementation

On 30/09/2019 11:33 pm, Jérôme Le Carrou wrote:
> Hi
>
> I am new on this forum and very, very new user of Django so hope you
> will be uncensorious
>
> I need to implement the safedelete application
> (https://buildmedia.readthedocs.org/media/pdf/django-safedelete/latest/django-safedelete.pdf)
> for my project but I should have miss something in the documentation
> because I did non manage tu use it correctly
>
> I will expose you briefly my problem
> I have 2 classes BiologyAssessment and BiologyExam linked with a
> foreignKey: a biologicalassessment is linked with multiple biologicalexam
>
> When I delete a biologicalassessment, I want related biologicalexamn
> to be 'delete' (but soft delete)
> When I delete a biologicalexam, I want biologicalexam to be delete
> (soft delete)
>
> I have implemented in my project but unfortunetly, when I delete a
> biologicalexam, the linked biologicalasessment is also delete
> I have try different to use _safedelete_policy = SOFT_DELETE for my
> BiologicalExam class but it does not chage anything
>
> could you help me ?
>
> models.py
>
> class BiologicalAssessment(SafeDeleteModel):
>
>     _safedelete_policy = SOFT_DELETE_CASCADE
>     ide = models.AutoField(primary_key=True)
>     vis_ref = models.ForeignKey(Visite, verbose_name='Visite',
> related_name='bilan', on_delete=models.CASCADE)

models.CASCADE will persuade Django to delete related child instances in
a cascade. It means if you delete the parent all related model instances
"below" it will also be deleted.

https://docs.djangoproject.com/en/2.1/ref/models/fields/#django.db.models.CASCADE

I don't know what SOFT_DELETE_CASCADE is all about but it is possible
your on_delete choice is defeating it.

Mike

>     bio_prv_dat = models.DateField("Date de prélèvement")
>
> class BiologicalExam(SafeDeleteModel):
>
>     _safedelete_policy = SOFT_DELETE_CASCADE
>     ide = models.AutoField(primary_key=True)
>     bio_ref = models.ForeignKey(BiologicalAssessment,
> verbose_name='Bilans', related_name='examen', on_delete=models.CASCADE)
>     bio_exa_cod = models.CharField("Type d'examen", max_length=3)
>     bio_exa_val = models.FloatField("Résultat de l'examen")
>     bio_exa_uni = models.CharField("Unité", max_length=50)
>     bio_exa_val_inf = models.FloatField("Limite inférieure")
>     bio_exa_val_sup = models.FloatField("Limite supérieure")
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