mant: removendo cascade do endereco da estacao e permitindo estacao c…

…om lista vazia de parametros

src/tupan/estacoes/migrations/0001_initial.py

@@ -1,4 +1,4 @@
-# Generated by Django 5.1.1 on 2024-09-20 14:29
+# Generated by Django 5.1.1 on 2024-09-23 13:45
 
 import django.db.models.deletion
 from django.db import migrations, models
@@ -59,8 +59,8 @@ class Migration(migrations.Migration):
                 ('nome', models.CharField(max_length=127)),
                 ('topico', models.CharField(help_text='Tópico do broker MQTT', max_length=127)),
                 ('ativo', models.BooleanField(default=True)),
-                ('endereco', models.OneToOneField(on_delete=django.db.models.deletion.CASCADE, to='estacoes.endereco')),
-                ('parametros', models.ManyToManyField(to='estacoes.parametro')),
+                ('endereco', models.OneToOneField(null=True, on_delete=django.db.models.deletion.SET_NULL, to='estacoes.endereco')),
+                ('parametros', models.ManyToManyField(blank=True, to='estacoes.parametro')),
             ],
             options={
                 'verbose_name': 'Estação',

src/tupan/estacoes/models.py

@@ -33,13 +33,13 @@ class Meta:
 
     def __str__(self):
         return self.cep
-    
+
 class Estacao(Base):
     nome = models.CharField(max_length=127)
-    endereco = models.OneToOneField(Endereco, on_delete=models.CASCADE)
+    endereco = models.OneToOneField(Endereco, null=True, on_delete=models.SET_NULL)
     topico = models.CharField(help_text="Tópico do broker MQTT", max_length=127)
     ativo = models.BooleanField(default=True)
-    parametros = models.ManyToManyField(Parametro)
+    parametros = models.ManyToManyField(Parametro, blank=True)
 
     class Meta:
         verbose_name = "Estação"