問題：
Django model_to_dict skips all DateTimeField when converting models
原因：
- model定义时，updated_at, created_at 添加了auto_now，auto_now_add
- 将
auto_now或auto_now_add设置为True，将导致该字段设置为editable=False和blank=True。
解决方案：
重写（自定义）model_to_dict
详细：
model 定义参照
代码语言：javascript复制class BaseModel(models.Model):
created_at = models.DateTimeField(auto_now_add=True, verbose_name='登録日時')
updated_at = models.DateTimeField(auto_now=True, verbose_name='更新日時')django自带model_to_dict定义参照
代码语言：python代码运行次数：0复制# 调用时导入
from django.forms.models import model_to_dict
# 定义参照
def model_to_dict(instance, fields=None, exclude=None):
"""
Return a dict containing the data in ``instance`` suitable for passing as
a Form's ``initial`` keyword argument.
``fields`` is an optional list of field names. If provided, return only the
named.
``exclude`` is an optional list of field names. If provided, exclude the
named from the returned dict, even if they are listed in the ``fields``
argument.
"""
opts = instance._meta
data = {}
for f in chain(opts.concrete_fields, opts.private_fields, opts.many_to_many):
if not getattr(f, 'editable', False): # 这里导致updated_at被跳过
continue
if fields is not None and f.name not in fields:
continue
if exclude and f.name in exclude:
continue
data[f.name] = f.value_from_object(instance)
return data重写model_to_dict，（或者别名）自定义方法
注：若重写该方法，调用时，要import自定义的方法。
代码语言：python代码运行次数：0复制# 重写 model_to_dict
# 形参添加 has_editable，默认True
# 调用时：from .util.convert import model_to_dict
>pj>util>convert.py
def model_to_dict(instance, fields=None, exclude=None, has_editable=True):
'''
model to dict。
Args:
instance: model
fields: プロパティを指定する
exclude: プロパティを除外する
has_editable: 自動更新も含めて処理する
return:
dict
'''
opts = instance._meta
data = {}
for f in chain(opts.concrete_fields, opts.private_fields, opts.many_to_many):
if not has_editable and not getattr(f, "editable", False):
# 若不处理自己动更新字段，则跳过
continue
if fields is not None and f.name not in fields:
continue
if exclude and f.name in exclude:
continue
data[f.name] = f.value_from_object(instance)
return data
