擅长:python、mysql、java
<p>首先,让我们创建一些动物对象(我从模型中删除了auto_now_add,以使其更简单):</p>
<pre><code>from random import randint
from datetime import timedelta
from django.utils import timezone
from animals.models import Animals
animals = []
base_date = timezone.now().replace(day=1)
for i in range(0, 10):
dt = base_date + timedelta(days=i)
animals.append(Animals(
cats=randint(0, 100),
dogs=randint(0, 100),
created=dt))
Animals.objects.bulk_create(animals)
</code></pre>
<p>然后我们可以这样做:</p>
^{pr2}$
<p>这将创建一个类似<a href="http://i.stack.imgur.com/LYo3J.png" rel="nofollow">this</a>的图表。在</p>