python - 'RawQuerySet' 对象没有属性 'key'

Question

我是 python 的新手，所以这很可能是我犯的一个愚蠢的错误。

我正在制作一个可以使用外部链接调用的 api。调用链接时，我的 Django 服务器出现以下错误:“'RawQuerySet' 对象没有属性 'key'”

下面是错误发生的代码(请求的定义，sql请求和我使用的模型)。当我尝试调用 planning.key 时发生错误。我相信 django 不知道它是哪种类型的对象，也不知道如何从中检索数据。

希望有人能看到我做错了什么。

出错的代码

def get(request):
    if not len(request.GET):
        raise WeegNetError(101)

    data = request.GET.copy()

    usr = user.checkUser(data)

    planning = libs.getPlanning(data['planningkey'])

    if not planning:
        raise WeegNetError(310)

    fields = {
        'key': planning.key,
        'reference': planning.reference,
        'startdate': planning.plan_start.strftime("%Y-%m-%d %H:%M:%S"),
        'enddate': None if not p.plan_end else planning.plan_end.strftime("%Y-%m-%d %H:%M:%S"),
        'product': planning.product,
        'address_from': {
                                'relation': planning.rel_from,
                                'street': planning.street_from,
                                'housenr': planning.housenr_from,
                                'zipcode': planning.zipcode_from,
                                'city': planning.city_from
                        },
        'address_to': {
                                'relation': planning.rel_to,
                                'street': planning.street_from,
                                'housenr': planning.housenr_to,
                                'zipcode': planning.zipcode_to,
                                'city': planning.city_to
                        }}
    return HttpResponse(simplejson.dumps(fields))

sql请求

def getPlanning(planningkey):
    sqlQuery = """SELECT k.key, 
        pl.id,
        pl.reference As ref, 
        pl.plan_start , 
        pl.plan_end, 
        pr.title as product,
        r1.name AS rel_from, 
        loc1.address AS street_from, 
        loc1.housenr AS housenrfrom, 
        loc1.zipcode AS zipcode_from, 
        loc1.city AS city_from, 
        r2.name as rel_to,  
        loc2.address AS street_to, 
        loc2.housenr AS housenr_to,
        loc2.zipcode AS zipcode_to, 
        loc2.city AS city_to 
        FROM `planning` pl
        LEFT JOIN `keys` k
        ON pl.id = k.planning_id
        LEFT JOIN `product` pr
        ON pl.product_id = pr.id
        LEFT JOIN `relations` r1
        ON pl.from_owner = r1.id
        LEFT JOIN `relations` r2
        ON pl.to_owner = r2.id
        LEFT JOIN `depot` dep1
        ON pl.to_depot = dep1.id
        LEFT JOIN `locatie` loc1
        ON dep1.locatie_id = loc1.id
        LEFT JOIN `depot` dep2
        ON pl.from_depot = dep2.id
        LEFT JOIN `locatie` loc2
        ON dep2.locatie_id = loc2.id
        WHERE pl.id = (SELECT planning_id
        FROM `keys`
        WHERE `key` = %(planningkey)s)
        AND pl.deleted = 0"""

    from models import Planning
    try:
        return Planning.objects.raw(sqlQuery, {'planningkey': planningkey})
    except:
        return None

模型

class Planning(models.Model):
    id = models.AutoField(primary_key=True)
    key = models.CharField(max_length=8, blank=True, null=True)
    reference = models.CharField(max_length=255, blank=True, null=True)
    plan_start = models.DateField(null=False)
    plan_end = models.DateTimeField(null=True, default=None)
    product = models.CharField(max_length=255, blank=True, null=False)
    rel_from = models.CharField(max_length=255, blank=True, null=True)
    street_from = models.CharField(max_length=255, blank=True, null=True)
    housenr_from = models.CharField(max_length=10, blank=True, null=True)
    zipcode_fom = models.CharField(max_length=10, blank=True, null=True)
    city_from = models.CharField(max_length=255, blank=True, null=True)
    rel_to = models.CharField(max_length=255, blank=True, null=True)
    street_to = models.CharField(max_length=255, blank=True, null=True)
    housenr_to = models.CharField(max_length=10, blank=True, null=True)
    zipcode_to = models.CharField(max_length=10, blank=True, null=True)
    city_to = models.CharField(max_length=255, blank=True, null=True)
    class Meta:
        db_table = u'planning'

Answer 1

Planning.objects.raw() 返回 RawQuerySet instance ，这与模型实例不同。

您需要对 RawQuerySet 进行迭代或切片以访问实际模型实例及其属性

qs = planning.objects.raw()
qs[0].key
for x in qs:
    x.key