Question

我将Test模型定义为：

class Test(models.Model):

    name = models.BinaryField(blank=False)
    time = models.TimeField()

    # one test case has many tests
    testcase = models.ForeignKey(TestCase)

    def __str__(self):
        return self.name

当我尝试解析xml文件以创建模型对象时，我有以下方法：

def add_test(testcase, obj):
    kwargs = {
        'name': "",
        'time': None,
    }
    status = 1
    # create the test object
    for k, v in obj.iteritems():
        if k == '@name':
            kwargs['name'] = v if v is not None else ""
        elif k == '@time':
            kwargs['time'] = v
    print kwargs
    test = Test(testcase=testcase, **kwargs)
    test.save()

在那里，testcase是TestCase模型的对象。 kwargs有正确的输入：

{'name': u'runTest', 'time': u'36.332'}

然而，当我调用上面的函数时，我得到：

Traceback (most recent call last):
  File "dbsync.py", line 131, in <module>
    add_testsuite("scale")
  File "dbsync.py", line 55, in add_testsuite
    add_testcases(testsuite, testcases)
  File "dbsync.py", line 87, in add_testcases
    status = add_test(testcase_obj, testcase)
  File "dbsync.py", line 103, in add_test
    test.save()
  File "/usr/local/lib/python2.7/dist-packages/django/db/models/base.py", line 710, in save
    force_update=force_update, update_fields=update_fields)
  File "/usr/local/lib/python2.7/dist-packages/django/db/models/base.py", line 738, in save_base
    updated = self._save_table(raw, cls, force_insert, force_update, using, update_fields)
  File "/usr/local/lib/python2.7/dist-packages/django/db/models/base.py", line 822, in _save_table
    result = self._do_insert(cls._base_manager, using, fields, update_pk, raw)
  File "/usr/local/lib/python2.7/dist-packages/django/db/models/base.py", line 861, in _do_insert
    using=using, raw=raw)
  File "/usr/local/lib/python2.7/dist-packages/django/db/models/manager.py", line 127, in manager_method
    return getattr(self.get_queryset(), name)(*args, **kwargs)
  File "/usr/local/lib/python2.7/dist-packages/django/db/models/query.py", line 920, in _insert
    return query.get_compiler(using=using).execute_sql(return_id)
  File "/usr/local/lib/python2.7/dist-packages/django/db/models/sql/compiler.py", line 970, in execute_sql
    for sql, params in self.as_sql():
  File "/usr/local/lib/python2.7/dist-packages/django/db/models/sql/compiler.py", line 928, in as_sql
    for obj in self.query.objs
  File "/usr/local/lib/python2.7/dist-packages/django/db/models/fields/__init__.py", line 710, in get_db_prep_save
    prepared=False)
  File "/usr/local/lib/python2.7/dist-packages/django/db/models/fields/__init__.py", line 2293, in get_db_prep_value
    value = self.get_prep_value(value)
  File "/usr/local/lib/python2.7/dist-packages/django/db/models/fields/__init__.py", line 2288, in get_prep_value
    return self.to_python(value)
  File "/usr/local/lib/python2.7/dist-packages/django/db/models/fields/__init__.py", line 2275, in to_python
    params={'value': value},
django.core.exceptions.ValidationError

我不太了解那里发生的事情......任何线索？

Answer 1

要完成这项工作，您必须将字符串转换为datetime.time。

kwargs['time'] = datetime.datetime.strptime(v, 'YOUR_TIME_FORMAT').time()

将YOUR_TIME_FORMAT替换为您拥有的输入时间格式。

Answer 2

它没有抱怨你传递变量的方式，它提出BinaryField而且我有一种有趣的感觉，它错过了追溯的最后一行，这会告诉我们你的价值观有什么问题。

我没有测试TimeField，但TimeField抱怨你的价值。我还没有测试过BinaryField，但只看File "<console>", line 1, in <module> File "/home/paco/Projects/sandeepbox/stackoverflow/bla/bla/field_validation.py", line 16, in <module> print a.is_valid() File "/home/paco/.virtualenvs/berou/local/lib/python2.7/site-packages/django/forms/forms.py", line 184, in is_valid return self.is_bound and not self.errors File "/home/paco/.virtualenvs/berou/local/lib/python2.7/site-packages/django/forms/forms.py", line 176, in errors self.full_clean() File "/home/paco/.virtualenvs/berou/local/lib/python2.7/site-packages/django/forms/forms.py", line 392, in full_clean self._clean_fields() File "/home/paco/.virtualenvs/berou/local/lib/python2.7/site-packages/django/forms/forms.py", line 407, in _clean_fields value = field.clean(value) File "/home/paco/.virtualenvs/berou/local/lib/python2.7/site-packages/django/forms/fields.py", line 162, in clean value = self.to_python(value) File "/home/paco/.virtualenvs/berou/local/lib/python2.7/site-packages/django/forms/fields.py", line 474, in to_python return super(TimeField, self).to_python(value) File "/home/paco/.virtualenvs/berou/local/lib/python2.7/site-packages/django/forms/fields.py", line 423, in to_python for format in self.input_formats: File "/home/paco/.virtualenvs/berou/local/lib/python2.7/site-packages/django/utils/functional.py", line 136, in __wrapper__ res = func(*self.__args, **self.__kw) File "/home/paco/.virtualenvs/berou/local/lib/python2.7/site-packages/django/utils/formats.py", line 110, in get_format for module in get_format_modules(lang): File "/home/paco/.virtualenvs/berou/local/lib/python2.7/site-packages/django/utils/formats.py", line 82, in get_format_modules modules = _format_modules_cache.setdefault(lang, list(iter_format_modules(lang, settings.FORMAT_MODULE_PATH))) File "/home/paco/.virtualenvs/berou/local/lib/python2.7/site-packages/django/utils/formats.py", line 51, in iter_format_modules if not check_for_language(lang): File "/home/paco/.virtualenvs/berou/local/lib/python2.7/site-packages/django/utils/translation/__init__.py", line 181, in check_for_language return _trans.check_for_language(lang_code) File "/home/paco/.virtualenvs/berou/local/lib/python2.7/site-packages/django/utils/lru_cache.py", line 125, in wrapper result = user_function(*args, **kwds) File "/home/paco/.virtualenvs/berou/local/lib/python2.7/site-packages/django/utils/translation/trans_real.py", line 409, in check_for_language if not language_code_re.search(lang_code): TypeError: expected string or buffer，就会显示以下内容：

from django import forms


class Test(forms.Form):
    time = forms.TimeField()

    def __str__(self):
        return self.name


kwargs = {'time': u'36.332'}
a = Test(kwargs)
print a.is_valid()

使用以下代码（不需要模型来显示验证）：

import datetime

from django import forms


class Test(forms.Form):
    time = forms.TimeField()

    def __str__(self):
        return self.name


kwargs = {'time': datetime.datetime.now().time()}
a = Test(kwargs)
print a.is_valid()

您需要以这种方式传递数据：

True

这次代码实际打印<item android:id="@+id/map_menu" android:icon="@drawable/ic_layer" android:orderInCategory="102" app:showAsAction="always" android:title="@string/action_settings"> <menu> <group android:id="@+id/map_types_group" android:checkableBehavior="single" > <item android:id="@+id/map_terrain" android:orderInCategory="1" app:showAsAction="ifRoom" android:title="@string/map_terrain"/> <item android:id="@+id/map_normal" android:orderInCategory="2" android:checked="true" app:showAsAction="ifRoom" android:title="@string/map_normal"/> <item android:id="@+id/map_hybrid" android:orderInCategory="3" app:showAsAction="ifRoom" android:title="@string/map_hybrid"/> </group> </menu> </item>

Django模型中的ValidationError

2 个答案: