我有一个 django 模型，我想为其添加自定义操作。在此操作中，我需要添加一个带有选择表单（下拉选择）的中间页面。我用下面的代码来得到这个。
模型类：
class VerificationAdmin(admin.ModelAdmin):
list_display = ('id','asset_code', 'scan_time','credential','status','operator','location','auth_code','product_details')
list_filter = ('status','operator','location')
ordering = ('-scan_time',)
search_fields = ('asset_code',)
actions = ['set_interval']
class AddScanningIntervalForm(forms.Form):
_selected_action = forms.CharField(widget=forms.MultipleHiddenInput)
period_choice=["4 hrs","6 hrs","8 hrs","10 hrs","12 hrs"]
interval = forms.ChoiceField(choices=[(x, x) for x in period_choice])
@csrf_exempt
def set_interval(self, request, queryset):
print "before action"
form = None
if 'apply' in request.POST:
form = self.AddScanningIntervalForm(request.POST)
print "action taken"
if form.is_valid():
interval = form.cleaned_data['interval']
print interval
count = 0
for vObj in queryset:
print vObj.asset_code,vObj.status,interval
at=AlertTable(asset_code=vObj.asset_code,
status=vObj.status,interval=interval) …我有JSON数据,我想解析它.
我使用了Code bellow:
def json_update(request):
j = urllib2.urlopen('http://ec2-72-44-51-113.compute-1.amazonaws.com:8001/get_latest_verification')
j_obj = json.load(j)
print j_obj.status
return HttpResponse(j_obj.status)
但是我收到了错误:
/ json_update中的AttributeError
'list'对象没有属性'status'
我的json数据:
[{"status": "Registered", "credential": "10000323xsds", "scan_time": "Jan.15,2014, 03:30 pm", "asset_code": "cls103", "emp_id": "LS07", "location": "BLR-10", "auth_code": "DSC(Verisign", "operator": "pradeep", "id": 538}]
什么是解析json数据的正确方法.
但是当我将代码更新为:
更新的代码:
def json_update(request):
j = urllib2.urlopen('http://ec2-72-44-51-113.compute-1.amazonaws.com:8001/get_latest_verification')
j_obj = json.load(j)
for jo in j_obj:
print j_obj[jo]['status']
return HttpResponse(j_obj[jo]['status'])
我收到错误:
/ error在/ json_update
list indices必须是整数,而不是dict
对于我的django应用程序,我试图通过amdin存储登录位置的日志.
我创建了一个中间件并尝试使用"django.contrib.gis.utils import GeoIP"来获取地理位置的纬度和经度值.
但得到的错误如下:
/ admin /的GeoIPException
GeoIP路径必须是有效的文件或目录.
代码:trackware.py
from django.contrib.gis.utils import GeoIP
from core.models import Log # your simple Log model
def get_ip(request):
xff = request.META.get('HTTP_X_FORWARDED_FOR')
if xff:
return xff.split(',')[0]
return request.META.get('REMOTE_ADDR')
class UserLocationLoggerMiddleware(object):
def process_request(self, request):
if request.user and request.user.is_superuser:
# Only log requests for superusers,
# you can control this by adding a setting
# to track other user types
ip = get_ip(request)
g = GeoIP()
lat,long = g.lat_lon(ip)
Log.objects.create(request.user, ip, lat, long)
我在settings.py中 …
我有一个应用程序有一个名为Verifications. 它具有诸如：asset_code、Status、Location、Emp_id 等字段。我可以使用 django 管理面板中的“添加验证”添加验证。但我想限制添加重复的 asset_code 条目（如果 asset_code 已经存在）。
class Verification(models.Model):
asset_code = models.CharField(verbose_name="Asset Code",max_length=16, default="")
scan_time = models.DateTimeField(verbose_name="Time of smartDNA scan",auto_now_add=True,default=datetime.datetime.now)
credential = models.CharField(verbose_name="smartDNA Credential",max_length=16, default="")
status = models.IntegerField(verbose_name="Scanning Status",choices=STATUS_CHOICES,default=1)
operator = models.CharField(verbose_name="Operator",max_length=16, default="")
location = models.CharField(verbose_name="Branch",max_length=64, default="")
auth_code = models.CharField(verbose_name="Scanner Authentication",max_length=20, default="DSC(Verisign")
emp_id = models.CharField(verbose_name="EMP ID",max_length=16, default="")
image = models.CharField(verbose_name="Image",max_length=24, default="dd")
created = models.DateTimeField(verbose_name="Created on",blank=True,auto_now_add=True)
modified = models.DateTimeField(verbose_name="Modified on",blank=True,auto_now=True)
product_details = models.CharField(verbose_name="Product Details",max_length=64, default="")
状态字段的值可以介于 1 到 10 之间。
如果 asset_code 已经存在并且状态=1，我如何防止在模型中添加条目。
我的 views.py 鳕鱼：
def update_details(request):
if request.method == "POST":
form = UpdateDetailsForm(request.POST)
if form.is_valid:
asset_code=form.cleaned_data['asset_code1']
fd=form.cleaned_data['product_details']
verifications = Verification.objects.filter(asset_code__exact=asset_code)
verifications.update(product_details=fd)
return render_to_response('update_details.html',
{'form':UpdateDetailsForm(),},
context_instance=RequestContext(request))
我想在我的模型中更新“product_details”列值，其中资产代码正是用户输入的内容。但是当我提交按钮时出现错误。
错误信息：
AttributeError 对象没有属性“cleaned_data”django
我有一个字段的Django模型：city，country_name和country_code。
我有一本字典，其中有超过8个键值对；我只想使用3并写入数据库。
但是我遇到一个错误
ModelBase object got multiple values for keyword argument 'country_code'
我的代码：
dicty = {
'city': u'Mountain View', 'continent_code': u'NA', 'region': u'CA',
'charset': 0, 'area_code': 650, 'longitude': -122.05740356445312,
'country_code3': u'USA', 'latitude': 37.4192008972168, 'postal_code': u'94043',
'dma_code': 807, 'country_code': u'US', 'country_name': u'United States'
}
m = Logger(city='city',country_name='country_name',country_code='country_code',**dicty)
m.save()
我如何解析['FED590498']python中的字符串,因此我可以单独获取所有数值590498和字符FED.
一些样品:
['ICIC889150']
['FED889150']
['MFL541606']
和[]不是字符串的一部分......
我试图将rgb图像的颜色空间从RGB转换为HSV.我使用过以下代码:
public class Main {
public static void main( String[] args )
{
try{
System.loadLibrary( Core.NATIVE_LIBRARY_NAME );
File input = new File("H:/Development/workspace/label.png");
BufferedImage image = ImageIO.read(input);
byte[] data=extractBytes(image);
Mat mat = new Mat(image.getHeight(),image.getWidth(),CvType.CV_8UC2);
mat.put(0, 0, data);
Mat mat1 = new Mat(image.getHeight(),image.getWidth(),CvType.CV_8UC2);
Imgproc.cvtColor(mat, mat1, Imgproc.COLOR_RGB2HSV);
byte[] data1 = new byte[mat1.rows()*mat1.cols()*(int)(mat1.elemSize())];
mat1.get(0, 0, data1);
BufferedImage image1 = new BufferedImage(mat1.cols(), mat1.rows(), 5);
image1.getRaster().setDataElements(0,0,mat1.cols(),mat1.rows(),data1);
File ouptut = new File("H:/Development/workspace/label_hsv.png");
ImageIO.write(image1, "png", ouptut);
} catch (Exception e) {
// System.out.println("Failed");
System.out.println("Error: " + e.getMessage());
e.printStackTrace(); …