I have this code in my model:

```
added_time = models.DateTimeField(
    default=datetime.datetime.now()
)

```

After I migrate and restart uwsgi, I get first datetime in MariaDB now, and all next - exactly the same as first after resetting uwsgi.

```
2015-04-19 16:01:46
2015-04-19 16:01:46
2015-04-19 16:01:46
2015-04-19 16:01:46

```

I fixed it by changing code to:

```
added_time = models.DateTimeField(
    auto_now_add=True
)

```

Though I fixed the problem, I'm not really sure why there even was such behavior?