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我正在尝试为 Django 管理后端创建表单字段在数据库中它应该是 CharField 字段，包含长度为 24*7 的“0”和“1”值。在管理面板中，我希望将它们视为 7 个字段，每个字段有 24 个复选框。编码：

模型.py：

from django.db import models
from places.widgets import *
from places.fields import *

class Place(models.Model):
    …
    time =          HoursWorkByWeekField()
    …

字段.py

from django.forms import fields
from django.db import models

from places.widgets import HoursWorkByWeekWidget

class HoursWorkByWeekField(models.CharField):
    widget = HoursWorkByWeekWidget

    def __init__(self):
        super(HoursWorkByWeekField, self).__init__(max_length=24*7, min_length=24*7)

    def to_python(self, value):
        return list(value)

    def get_db_prep_value(self, value):
        result = []
        for i in range(24*7):
            if value[i] :
                result += ['1']
            else :
                result += ['0']
        return ''.join(result)

小部件.py

from django.forms import widgets

class HoursWorkByDayWidget(widgets.CheckboxSelectMultiple):
    def render(self, name, attrs=None):
        choices = range(0,24,1)
        return widgets.CheckboxSelectMultiple.render(self, name, attrs, choices)

class HoursWorkByWeekWidget(widgets.MultiWidget):
    def __init__(self, attrs=None):
        widgets = (
            HoursWorkByDayWidget(),
            HoursWorkByDayWidget(),
            HoursWorkByDayWidget(),
            HoursWorkByDayWidget(),
            HoursWorkByDayWidget(),
            HoursWorkByDayWidget(),
            HoursWorkByDayWidget(),
        )
        super(HoursWorkByWeekWidget, self).__init__(widgets, attrs)

当我尝试同步数据库时出现错误：

TypeError: Error when calling the metaclass bases unhashable type: 'dict'
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