我正在制作a task tracker webapp（也可以使用the full source code），并且我有一个数据库结构，其中每个任务都有标题，描述和一些实例，每个实例都可以标记为不完整/不完整：
import matplotlib.pyplot as plt
from mpl_toolkits.mplot3d import Axes3D
def plot(data):
fig = plt.figure(figsize=(10,10))
ax = fig.gca(projection='3d')
for i in range(data.shape[0]):
for j in range(data.shape[1]):
ax.scatter([i]*data.shape[0], [j]*data.shape[1],
[i for i in range(data.shape[2])],
c=['r' if i == 0 else 'b' for i in data[i,j]], s=50)
plot(data)
plt.show()
plt.close('all')
plot(v)
plt.show()
任务和实例可以分别共享，尽管对实例的访问应隐含对任务的读取访问。这是针对教室情况的，教师可以创建任务并将其分配给学生。
class Task(models.Model):
title = OneLineTextField()
description = models.TextField(blank=True)
class TaskInstance(models.Model):
task = models.ForeignKey(Task, on_delete=models.CASCADE)
is_complete = models.BooleanField()
我的问题是如何为class TaskPermission(models.Model):
task = models.ForeignKey(Task, on_delete=models.CASCADE, related_name='permissions')
user = models.ForeignKey(User, on_delete=models.CASCADE, related_name='task_permissions_granted')
shared_by = models.ForeignKey(User, on_delete=models.PROTECT, null=True, related_name='task_permissions_granting')
can_edit = models.BooleanField(default=False)
class Meta:
unique_together = 'task', 'user', 'shared_by',
class TaskInstancePermission(models.Model):
task_instance = models.ForeignKey(TaskInstance, on_delete=models.CASCADE, related_name='permissions')
user = models.ForeignKey(User, on_delete=models.CASCADE, related_name='task_instance_permissions_granted')
shared_by = models.ForeignKey(User, on_delete=models.PROTECT, null=True, related_name='task_instance_permissions_granting')
can_edit = models.BooleanField(default=False)
class Meta:
unique_together = 'task_instance', 'user', 'shared_by',
创建表单，并为其TaskInstance及其is_complete的{{1}}和Task字段。这样的事情行吗？还是我需要实现自己的title和description方法？
save