小编Hoo*_*ook的帖子

我使用1.8版本的Django和我的CSS,JS或图像不工作,我真的不知道为什么,我的项目文件夹就像

Project
    Jetint
      Static
        CSS

Run Code Online (Sandbox Code Playgroud)

我的设置:

    DEBUG = True

ALLOWED_HOSTS = []


# Application definition

INSTALLED_APPS = (
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'clients',
    'front',
)

MIDDLEWARE_CLASSES = (
    'django.contrib.sessions.middleware.SessionMiddleware',
    'django.middleware.common.CommonMiddleware',
    'django.middleware.csrf.CsrfViewMiddleware',
    'django.contrib.auth.middleware.AuthenticationMiddleware',
    'django.contrib.auth.middleware.SessionAuthenticationMiddleware',
    'django.contrib.messages.middleware.MessageMiddleware',
    'django.middleware.clickjacking.XFrameOptionsMiddleware',
    'django.middleware.security.SecurityMiddleware',
)

ROOT_URLCONF = 'jetint.urls'

TEMPLATES = [
    {
        'BACKEND': 'django.template.backends.django.DjangoTemplates',
        'DIRS': ['jetint/templates'],
        'APP_DIRS': True,
        'OPTIONS': {
            'context_processors': [
                'django.template.context_processors.debug',
                'django.template.context_processors.request',
                'django.contrib.auth.context_processors.auth',
                'django.contrib.messages.context_processors.messages',
            ],
        },
    },
]

WSGI_APPLICATION = 'jetint.wsgi.application'


# Database
# https://docs.djangoproject.com/en/1.8/ref/settings/#databases

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.mysql',
        'NAME': 'bd', …

我正在处理Django项目，但出现此错误，“状态匹配查询不存在”。为什么会这样呢？状态在模型存储区中，您可以向我解释此错误以及如何解决吗？

谢谢。观看次数：

def Test(request):
    stores = Store.objects.all()

    data = []

    for store in stores:
        data.append({
            'id': store.id,
            'name': store.name,
            'address': store.address,
            'state': store.state,
        })

    return HttpResponse(json.dumps(data), 'application/json')

楷模：

class State(models.Model):
    name = models.CharField(max_length=255)
    shortname = models.CharField(max_length=100)


    def __unicode__(self):
        return self.name


class City(models.Model):
    name = models.CharField(max_length=255)
    state = models.ForeignKey(State)

    def __unicode__(self):
        return self.name


class Store(models.Model):
    name = models.CharField(max_length=255, null=True, blank=True)
    address = models.CharField(max_length=255, blank=True, null=True)
    lon = models.FloatField(blank=True, null=True)
    lat = models.FloatField(blank=True, null=True)
    state = models.ForeignKey(State)
    city = models.ForeignKey(City)


    def __unicode__(self): …

我正在尝试使用map一个函数来获取列表列表的最后一个元素.例如:

 [ [0,0,4],[2,4,2],[1,3,5],[3,1,1] ] => [4,2,5,1]

我写过:

 func l = map (last l) 

并得到此错误:

    > ERROR - Type error in application
 Expression     : func [[0,0,4],[2,4,2],[1,3,5],[3,1,1]]
 Term           : [[0,0,4],[2,4,2],[1,3,5],[3,1,1]]
 Type           : [[c]]
 Does not match : [a -> b]

这样做的正确方法是什么？

time :: Int -> (Int,Int,Int)
time x = ((x/3600),(x`mod`3600)/60,((x`mod`3600)`mod`60))   

定义时间所需的分数Int实例

expample =

时间x =(小时,分钟,秒)

时间3600 =(1,0,0)

以秒为单位给出时间,必须在示例3600中显示如下(小时,分钟,秒)为1h 0m 0s