Muda timestamp de norma pra null

Signed-off-by: Luciano Almeida <lucianoalmeida@interlegis.leg.br>

sapl/norma/migrations/0004_auto_20170522_1115.py

@@ -0,0 +1,27 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.9.12 on 2017-05-22 11:15
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+import sapl.norma.models
+import sapl.utils
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('norma', '0003_auto_20170510_1549'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='normajuridica',
+            name='texto_integral',
+            field=models.FileField(blank=True, null=True, upload_to=sapl.norma.models.norma_upload_path, validators=[sapl.utils.restringe_tipos_de_arquivo_txt], verbose_name='Texto Integral'),
+        ),
+        migrations.AlterField(
+            model_name='normajuridica',
+            name='timestamp',
+            field=models.DateTimeField(null=True),
+        ),
+    ]

sapl/norma/models.py

@@ -116,7 +116,7 @@ class NormaJuridica(models.Model):
         AssuntoNorma, blank=True,
         verbose_name=_('Assuntos'))
     data_vigencia = models.DateField(blank=True, null=True)
-    timestamp = models.DateTimeField()
+    timestamp = models.DateTimeField(null=True)
 
     texto_articulado = GenericRelation(
         TextoArticulado, related_query_name='texto_articulado')