python - Django 不接受空白字段有什么原因吗？

Question

我正在做一个项目，我最初打算要求一些现在是可选的字段。但是，如果将较新的字段留空，它们仍将引发错误。

从我的models.py：

class PlanOfAction(models.Model):
PoA_1 = models.CharField(max_length=255, blank=True, default="")
q1_why = models.CharField(max_length=255, blank=True, default="")
PoA_2 = models.CharField(max_length=255, blank=True, default="yeah")
q2_why = models.CharField(max_length=255, blank=True, default="")
PoA_3 = models.CharField(max_length=255, blank=True, default="")
q3_why = models.CharField(max_length=255, blank=True, default="")

long_term_goal = models.CharField(max_length=255, blank=True, default="")
long_term_date = models.CharField(max_length=255, blank=True, default="")
long_term_actions_1 = models.CharField(max_length=255, blank=True, default="")
long_term_actions_2 = models.CharField(max_length=255, blank=True, default="")
long_term_actions_3 = models.CharField(max_length=255, blank=True, default="")

short_term_1 = models.CharField(max_length=255, blank=True, default="")
short_term_1_date = models.CharField(max_length=255, blank=True, default="")
short_term_actions_1_1 = models.CharField(max_length=255, blank=True, default="")
short_term_actions_1_2 = models.CharField(max_length=255, blank=True, default="")
short_term_actions_1_3 = models.CharField(max_length=255, blank=True, default="")

created_by = models.ForeignKey(User, related_name="user_poa")

objects = PlanManager()

created_at = models.DateTimeField(auto_now_add = True)
updated_at = models.DateTimeField(auto_now = True)

以及它在models.py中写入数据库的位置

 new_plan = PlanOfAction.objects.create(
            PoA_1 = POST['PoA_1'],
            q1_why = POST['q1_why'],
            PoA_2 = POST['PoA_2'],
            q2_why = POST['q2_why'],
            PoA_3 = POST['PoA_3'],
            q3_why = POST['q3_why'],

            long_term_goal = POST['long_term_goal'],
            long_term_date = POST['long_term_date'],
            long_term_actions_1 = POST['long_term_actions_1'],
            long_term_actions_2 = POST['long_term_actions_2'],
            long_term_actions_3 = POST['long_term_actions_3'],

            short_term_1 = POST['short_term_goal_1'],
            short_term_1_date = POST['short_term_1_date'],
            short_term_actions_1_1 = POST['short_term_actions_1_1'],
            short_term_actions_1_2 = POST['short_term_actions_1_2'],
            short_term_actions_1_3 = POST['short_term_actions_1_3'],

            created_by = User.objects.get(id=id),
        )    

如果我将短期行动留空，我不会收到任何错误。我后来确实添加了这些，并最初将它们设置为空白 = True 和默认 =“”。更新其他字段后，我删除了迁移文件夹 db.sqlite3，运行 migrate，makemigrations，然后再次迁移。如果该字段为空白，我每次在 PoA_2 = POST['PoA_2'] 上都会出错。

MultiValueDictKeyError at /view_your_plan
"u'PoA_2'"

有任何想法吗？

使用 Python 2.7。

标签： pythondjangosqlite