如何测试ArrayField Django 1.11

Question

Django 1.11
我正在forms中按Meta测试ArrayList Model。{ 我已经从我的问题中删除了不相关的代码。

models.py

class MailAPIScheduler(DirtyFieldsMixin, AbstractSoftModelController):
    summary_email_receivers = ArrayField(
        models.EmailField(blank=True),
        blank=True
    )

forms.py

import json

from django import forms

from eneos.apps.mail_api_schedule.models import MailAPIScheduler


class MailAPISchedulerForm(forms.ModelForm):
    schedule_time = forms.TimeField()

    class Meta:
        model = MailAPIScheduler
        fields = [
            'api_url',
            'schedule_time',
            'parameters',
            'summary_email_receivers',
        ]

    def clean_schedule_time(self):
        dt = self.cleaned_data['schedule_time']
        return {
            'hour': dt.hour,
            'minute': dt.minute,
        }

tests.py

def test_mail_api_scheulder_form(self):
    data = {
        'api_url': 'http://hotmail.com',
        'schedule_time': '9:30',
        'parameters': json.dumps({'key1': 'value1', 'key2': 'value2'}),
        'summary_email_receivers': ["elcolie@gmail.com", "sarit.r@codium.co"]
    }
    form = MailAPISchedulerForm(data)
    import pdb; pdb.set_trace()
    self.assertEqual(True, form.is_valid())
    self.assertDictEqual(form.cleaned_data.get('schedule_time'), {
        'hour': 9,
        'minute': 30,
    })

Run tests

$ python manage.py test eneos.apps.mail_api_schedule.tests.TestMailAPIScheduler.test_mail_api_scheulder_form --nomigrations --settings=eneos.config.settings.local
Hey, I'm Local!
Creating test database for alias 'default'...
> /Users/el/Code/eneos-pos-web/eneos/apps/mail_api_schedule/tests.py(188)test_mail_api_scheulder_form()
-> self.assertEqual(True, form.is_valid())
(Pdb) n
AttributeError: 'list' object has no attribute 'split'

我哪里错了？