Question

我得到一个＆＃39;异常值：期望的字符串或缓冲区＆＃39;每次我提交表格。看起来似乎问题出在模型领域＆＃39; pub_date＆＃39;。我附上了我的代码和我正在追溯的追溯。

我的问题是，这里到底出了什么问题，是否有办法解决这个问题？

#MODELS

class Entry(models.Model):
    pub_date=models.DateTimeField(default=datetime.datetime.now,blank=True)


#FORMS

class SellForm(ModelForm):
    class Meta:
        model = Entry
        fields = ['pub_date']


#VIEWS

def get_entry(request):
    if request.method == 'POST':
        f = SellForm(request.POST)
        if f.is_valid():
            obj=f.save(commit=False)
            obj.save()
            return HttpResponseRedirect('/storefront/')
    else:
        f = SellForm()
    return render(request, 'sell.html', {'form': f})


Traceback:
File "/Users/benjamino/Desktop/deal/lib/python2.7/site-packages/django/core/handlers/base.py" in get_response
  114.                     response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "/Users/benjamino/Desktop/deal/deal/accounts/views.py" in get_entry
  27.       form.save()
File "/Users/benjamino/Desktop/deal/lib/python2.7/site-packages/django/db/models/base.py" in save
  545.                        force_update=force_update, update_fields=update_fields)
File "/Users/benjamino/Desktop/deal/lib/python2.7/site-packages/django/db/models/base.py" in save_base
  573.             updated = self._save_table(raw, cls, force_insert, force_update, using, update_fields)
File "/Users/benjamino/Desktop/deal/lib/python2.7/site-packages/django/db/models/base.py" in _save_table
  654.             result = self._do_insert(cls._base_manager, using, fields, update_pk, raw)
File "/Users/benjamino/Desktop/deal/lib/python2.7/site-packages/django/db/models/base.py" in _do_insert
  687.                                using=using, raw=raw)
File "/Users/benjamino/Desktop/deal/lib/python2.7/site-packages/django/db/models/manager.py" in _insert
  232.         return insert_query(self.model, objs, fields, **kwargs)
File "/Users/benjamino/Desktop/deal/lib/python2.7/site-packages/django/db/models/query.py" in insert_query
  1511.     return query.get_compiler(using=using).execute_sql(return_id)
File "/Users/benjamino/Desktop/deal/lib/python2.7/site-packages/django/db/models/sql/compiler.py" in execute_sql
  897.         for sql, params in self.as_sql():
File "/Users/benjamino/Desktop/deal/lib/python2.7/site-packages/django/db/models/sql/compiler.py" in as_sql
  855.                 for obj in self.query.objs
File "/Users/benjamino/Desktop/deal/lib/python2.7/site-packages/django/db/models/fields/__init__.py" in get_db_prep_save
  350.                                       prepared=False)
File "/Users/benjamino/Desktop/deal/lib/python2.7/site-packages/django/db/models/fields/__init__.py" in get_db_prep_value
  911.             value = self.get_prep_value(value)
File "/Users/benjamino/Desktop/deal/lib/python2.7/site-packages/django/db/models/fields/__init__.py" in get_prep_value
  895.         value = self.to_python(value)
File "/Users/benjamino/Desktop/deal/lib/python2.7/site-packages/django/db/models/fields/__init__.py" in to_python
  854.             parsed = parse_datetime(value)
File "/Users/benjamino/Desktop/deal/lib/python2.7/site-packages/django/utils/dateparse.py" in parse_datetime
  67.     match = datetime_re.match(value)

Exception Type: TypeError at /sell/
Exception Value: expected string or buffer

Answer 1

我是因为这里：

    obj=f.save(commit=False)
    obj.save()

您正在保存整个表格。为了什么？我认为从表单字段中提取数据并使用它们会更好。有一个内置的表单cleaning_data属性。 f.cleaned_data - 你会得到字典形式字段值。

为什么我得到＆＃39;异常值：期望的字符串或缓冲区＆＃39;提交表格时？

1 个答案: