Add updated_at and created_at fields to models

For managing data life cycle

app/server/migrations/0004_created_at.py

@@ -0,0 +1,150 @@
+# Generated by Django 2.1.5 on 2019-02-25 01:38
+
+from django.db import migrations, models
+import django.db.models.deletion
+import django.utils.timezone
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('server', '0003_shortcut'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='Seq2seqDocument',
+            fields=[
+            ],
+            options={
+                'proxy': True,
+                'indexes': [],
+            },
+            bases=('server.document',),
+        ),
+        migrations.CreateModel(
+            name='Seq2seqProject',
+            fields=[
+            ],
+            options={
+                'proxy': True,
+                'indexes': [],
+            },
+            bases=('server.project',),
+        ),
+        migrations.CreateModel(
+            name='SequenceLabelingDocument',
+            fields=[
+            ],
+            options={
+                'proxy': True,
+                'indexes': [],
+            },
+            bases=('server.document',),
+        ),
+        migrations.CreateModel(
+            name='SequenceLabelingProject',
+            fields=[
+            ],
+            options={
+                'proxy': True,
+                'indexes': [],
+            },
+            bases=('server.project',),
+        ),
+        migrations.CreateModel(
+            name='TextClassificationDocument',
+            fields=[
+            ],
+            options={
+                'proxy': True,
+                'indexes': [],
+            },
+            bases=('server.document',),
+        ),
+        migrations.CreateModel(
+            name='TextClassificationProject',
+            fields=[
+            ],
+            options={
+                'proxy': True,
+                'indexes': [],
+            },
+            bases=('server.project',),
+        ),
+        migrations.AddField(
+            model_name='document',
+            name='created_at',
+            field=models.DateTimeField(auto_now_add=True, default=django.utils.timezone.now),
+            preserve_default=False,
+        ),
+        migrations.AddField(
+            model_name='document',
+            name='updated_at',
+            field=models.DateTimeField(auto_now=True),
+        ),
+        migrations.AddField(
+            model_name='documentannotation',
+            name='created_at',
+            field=models.DateTimeField(auto_now_add=True, default=django.utils.timezone.now),
+            preserve_default=False,
+        ),
+        migrations.AddField(
+            model_name='documentannotation',
+            name='updated_at',
+            field=models.DateTimeField(auto_now=True),
+        ),
+        migrations.AddField(
+            model_name='label',
+            name='created_at',
+            field=models.DateTimeField(auto_now_add=True, default=django.utils.timezone.now),
+            preserve_default=False,
+        ),
+        migrations.AddField(
+            model_name='label',
+            name='updated_at',
+            field=models.DateTimeField(auto_now=True),
+        ),
+        migrations.AddField(
+            model_name='seq2seqannotation',
+            name='created_at',
+            field=models.DateTimeField(auto_now_add=True, default=django.utils.timezone.now),
+            preserve_default=False,
+        ),
+        migrations.AddField(
+            model_name='seq2seqannotation',
+            name='updated_at',
+            field=models.DateTimeField(auto_now=True),
+        ),
+        migrations.AddField(
+            model_name='sequenceannotation',
+            name='created_at',
+            field=models.DateTimeField(auto_now_add=True, default=django.utils.timezone.now),
+            preserve_default=False,
+        ),
+        migrations.AddField(
+            model_name='sequenceannotation',
+            name='updated_at',
+            field=models.DateTimeField(auto_now=True),
+        ),
+        migrations.AlterField(
+            model_name='documentannotation',
+            name='document',
+            field=models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='doc_annotations', to='server.TextClassificationDocument'),
+        ),
+        migrations.AlterField(
+            model_name='project',
+            name='description',
+            field=models.TextField(),
+        ),
+        migrations.AlterField(
+            model_name='seq2seqannotation',
+            name='document',
+            field=models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='seq2seq_annotations', to='server.Seq2seqDocument'),
+        ),
+        migrations.AlterField(
+            model_name='sequenceannotation',
+            name='document',
+            field=models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='seq_annotations', to='server.SequenceLabelingDocument'),
+        ),
+    ]

app/server/models.py

@@ -117,6 +117,8 @@ class Label(models.Model):
     project = models.ForeignKey(Project, related_name='labels', on_delete=models.CASCADE)
     background_color = models.CharField(max_length=7, default='#209cee')
     text_color = models.CharField(max_length=7, default='#ffffff')
+    created_at = models.DateTimeField(auto_now_add=True)
+    updated_at = models.DateTimeField(auto_now=True)
 
     def __str__(self):
         return self.text
@@ -132,6 +134,8 @@ class Document(models.Model):
     text = models.TextField()
     project = models.ForeignKey(Project, related_name='documents', on_delete=models.CASCADE)
     metadata = models.TextField(default='{}')
+    created_at = models.DateTimeField(auto_now_add=True)
+    updated_at = models.DateTimeField(auto_now=True)
 
     def __str__(self):
         return self.text[:50]
@@ -168,6 +172,8 @@ class Annotation(models.Model):
     prob = models.FloatField(default=0.0)
     manual = models.BooleanField(default=False)
     user = models.ForeignKey(User, on_delete=models.CASCADE)
+    created_at = models.DateTimeField(auto_now_add=True)
+    updated_at = models.DateTimeField(auto_now=True)
 
     class Meta:
         abstract = True