Correct improperly Servico cascade deletion when Funcionario was removed

sigi/apps/servicos/migrations/0003_auto_20170407_1003.py

@@ -0,0 +1,27 @@
+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+from django.db import models, migrations
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('servicos', '0002_tiposervico_modo'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='servico',
+            name='contato_administrativo',
+            field=models.ForeignKey(related_name='contato_administrativo', on_delete=django.db.models.deletion.PROTECT, verbose_name='Contato administrativo', to='casas.Funcionario'),
+            preserve_default=True,
+        ),
+        migrations.AlterField(
+            model_name='servico',
+            name='contato_tecnico',
+            field=models.ForeignKey(related_name='contato_tecnico', on_delete=django.db.models.deletion.PROTECT, verbose_name='Contato t\xe9cnico', to='casas.Funcionario'),
+            preserve_default=True,
+        ),
+    ]

sigi/apps/servicos/models.py

@@ -39,8 +39,8 @@ class TipoServico(models.Model):
 class Servico(models.Model):
     casa_legislativa = models.ForeignKey(CasaLegislativa, verbose_name=_(u'Casa Legislativa'))
     tipo_servico = models.ForeignKey(TipoServico, verbose_name=_(u'Tipo de serviço'))
-    contato_tecnico = models.ForeignKey(Funcionario, verbose_name=_(u'Contato técnico'), related_name='contato_tecnico')
-    contato_administrativo = models.ForeignKey(Funcionario, verbose_name=_(u'Contato administrativo'), related_name='contato_administrativo')
+    contato_tecnico = models.ForeignKey(Funcionario, verbose_name=_(u'Contato técnico'), related_name='contato_tecnico', on_delete=models.PROTECT)
+    contato_administrativo = models.ForeignKey(Funcionario, verbose_name=_(u'Contato administrativo'), related_name='contato_administrativo', on_delete=models.PROTECT)
     url = models.URLField(_(u'URL do serviço'), blank=True)
     hospedagem_interlegis = models.BooleanField(_(u'Hospedagem no Interlegis?'), default=False)
     nome_servidor = models.CharField(_(u'Hospedado em'), max_length=60, blank=True,