Django datefime文件忽略毫秒和额外的d

Question

默认情况下，Django DateTime文件保存并显示数据中的秒、毫秒和额外信息，例如，它保存并显示的日期如下：

2018-07-21 05:27:29.736956+00:00

在尝试检索数据时，是否有任何方法或全局函数忽略额外信息而只获取日期和时间？就像

2018-07-21 05:27:29

型号：

class Enrolled(models.Model):
    user = models.ForeignKey(User, on_delete=models.DO_NOTHING)
    product = models.ForeignKey(Product, on_delete=models.CASCADE, to_field='product_id',
                                related_name='enroll')
    created_date = models.DateTimeField(auto_now_add=True)

系列化器

class EnrolledSerializer(ModelSerializer):
    ptitle = serializers.SerializerMethodField()
    instructor = serializers.SerializerMethodField()
    instructorid = serializers.SerializerMethodField()
    pslug = serializers.SerializerMethodField()

    def get_instructor(self, object):
        return object.product.author.username

    def get_instructorid(self, object):
        return object.product.author.id

    def get_ptitle(self, obj):
        return obj.product.title

    def get_pslug(self, obj):
        return obj.product.slug

    class Meta:
        model = Enrolled
        fields = [
            'id',
            'user',
            'product',
            'ptitle',
            'instructorid',
            'pslug',
            'instructor',
            'created_date',
        ]

        read_only_fields = ['product', 'created_date', 'id', 'user', 'instructor', 'instructorid', 'pslug', 'ptitle']

//编辑：

REST_FRAMEWORK = {
    'DATETIME_FORMAT': ("%Y-%m-%d %H:%M"),
    'DEFAULT_PERMISSION_CLASSES': (
        'rest_framework.permissions.AllowAny',
    ),
    'DEFAULT_AUTHENTICATION_CLASSES': (

        'rest_framework_jwt.authentication.JSONWebTokenAuthentication',
        'rest_framework.authentication.SessionAuthentication',
        'rest_framework.authentication.TokenAuthentication',
    ),
    'DEFAULT_RENDERER_CLASSES': (
        'rest_framework.renderers.JSONRenderer',
        'rest_framework.renderers.BrowsableAPIRenderer',
    )
}

USE_I18N = False

USE_L10N = False

USE_TZ = True

Answer 1

似乎与Change time format in Django Views有关

使用

microsecond=0

或者您可以按照模板过滤器https://docs.djangoproject.com/en/2.0/ref/templates/builtins/#std:templatefilter-date的要求在视图中格式化datetime

{{ value|date:"Y-m-d" }} {{ value|time:"H:i:s" }}

Answer 2

通过设置所有日期时间字段，可以为created_date设置日期时间格式：

REST_FRAMEWORK = {
    'DATETIME_FORMAT': "%Y-%m-%d %H:%M",
}

仅适用于当前序列化程序，如果其他字段只是引用，则可以使用source选项，例如：

class EnrolledSerializer(ModelSerializer):
    created_date = serializers.DateTimeField(format="%Y-%m-%d %H:%M")
    ptitle = serializers.CharField(source='product.author.username')

阅读文档：date-and-time-fields和source。你知道吗