这是我的models.py:
class Group_Photo(models.Model):
group_id = models.ForeignKey(Group)
photo = models.ImageField(upload_to="static/image/group/" + group_id + "/")
我想将图像上传到一个组的目录.例如,如果group_id = 3,
upload_to="static/image/group/3/"
我应该怎么做？
对不起,这是错误.
文件"/models.py",第161行,在Group_Photo中photo = models.ImageField(upload_to ="static/image/group /"+ group_id +"/")TypeError:无法隐式地将'ForeignKey'对象转换为str
例如，我有50个迁移，并且已将所有迁移压缩到0001_initial.py，然后又达到50个迁移。我如何压缩迁移？
我尝试运行服务器时遇到以下错误:
ImportError: no module named rest_framework_nested
有人可以帮忙吗？
我正在开发一个小应用程序,我可以在其中显示我的数据库中的所有表(sqlite3),并选择其中一个,可视化数据(我知道我可以使用管理员,但我需要在应用程序中这样做)
我的model.py中有不同的模型,比如myModel1,myModel2 ......
在我的views.py中
def myhomepage(request):
tables_list = connection.introspection.table_names()
return render(request, 'myhomepage.html', { 'tables_list': tables_list})
def detail_table(request, table):
try:
Table_to_View = ContentType.objects.get(app_label="myapp", model=table)
except Table_to_View.DoesNotExist:
raise Http404 ("La tabella non esiste")
context = {'Table_to_View' : Table_to_View }
return render(request, "detail_table.html", context )
和模板myhomepage.html
{#something#}
<title>Lista delle tabelle</title>
<body>
{% if tables_list %}
<ul>
{%for t in tables_list %}
<li> <a href="{% url 'detail_table' t %}"> {{table}}</a></li>
{% endfor %}
</ul>
{% endif %}
这是urls.py
from django.conf.urls import url
from . …我试图创建一个django模型来获取新闻通讯的注册,同时在model.py文件中创建模型我得到以下错误
from __future__ import unicode_literals
from django.db import models
def SignUp(models.Model):
Email = models.EmailField(max_length=254, null = False , blank = False)
Name = CharField(max_length= 26, null = False , blank = False, default = 'datta')
TmieStamp = DateTimeField(auto_now=False, auto_now_add=True)
def __unicode(self)__:
return self.Name
错误:
Error:
File "C:\Users\DattaVamshi\Desktop\env\src\newsletter\models.py", line 7
def SignUp(models.Model):
^
SyntaxError: invalid syntax
错误在这一行"def SignUp(models.Model):"
Pyhon 2.7,Django 1.9
我创建了一个出价模型,以便第2类用户可以对第1类用户创建的某些"帖子"出价.为实现这一目标,我在"Bid"模型中为post field创建了一个外键.
实际上我想将出价与'post'模型中的自动生成'id'的特定帖子联系起来.所以我在我的模板中将get_absolute_url放在Post'id'旁边.我是django的新手,我不确定它是否适用于我想要的东西.
如何将出价与post_id关联到模板中的特定帖子,以便我可以获得各种类型2用户针对特定帖子的出价金额？我很乐意帮助我解决这个问题.
这是我的代码:
Models.py:
class Post(models.Model):
post_id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
user = models.ForeignKey(settings.AUTH_USER_MODEL, default=1)
from1 = models.CharField(max_length=20)
timestamp = models.DateTimeField(auto_now=False, auto_now_add=True)
objects = PostManager()
def __str__(self):
return self.post_id
def get_absolute_url(self):
return reverse("posts:detail", kwargs={"id": self.post_id})
class Meta:
ordering = ["-timestamp", "-Time"]
class Bid(models.Model):
bid_id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
post = models.ForeignKey(Post, default=uuid.uuid4, related_name='bids' )
user = models.OneToOneField(settings.AUTH_USER_MODEL, null=True, blank=True, unique=False)
amount = models.IntegerField()
def get_absolute_url(self):
return reverse("accept_bid", kwargs={"bid_id": self.bid_id})
def __unicode__(self):
return self.amount
def __str__(self):
return self.amount
forms.py: …
我创建了一个模型'Post',其中我使用UUID而不是Django内置的自动生成ID.在'Post'模型中,我定义了一个def get_absolute_url,以便我可以将它保存在我的模板中.当我试图获得交易页面时,它引发了一个错误:NoReverseMatch at/deal/Reverse为'detail'带参数'(UUID('086d177f-9071-4548-b5db-1d329078853e'),)'和关键字参数'{}' 未找到.尝试了1种模式:['deal /(？P\d +)/ $'].我很感激帮助我解决这个问题.
这是我的代码:
Models.py:
class Post(models.Model):
post_id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
user = models.ForeignKey(settings.AUTH_USER_MODEL, default=1)
from1 = models.CharField(max_length=20)
def __str__(self):
return self.post_id
def get_absolute_url(self):
return reverse("detail", args=(self.post_id))
urls.py:
url(r'^deal/$', views.deal, name='deal'),
url(r'^deal/(?P<post_id>\d+)/$', views.post_detail, name='detail'),
Views.py:
def deal(request):
queryset_list = Post.objects.active() #.order_by("-timestamp")
if request.user.is_staff or request.user.is_superuser:
queryset_list = Post.objects.all()
context = {
"object_list": queryset_list,
"post_id": "List",
}
return render(request, 'before_login/deal.html', context)
def post_detail(request, post_id=None):
instance = get_object_or_404(Post, post_id=post_id)
if instance.date > timezone.now().date():
if not request.user.is_staff or …我有过滤问题django-models.
我想返回特定的所有记录,animal但根据最新created_at值排除最后一项,并按降序排序.
我有这个模型.
class Heat(models.Model):
# Fields
performer = models.CharField(max_length=25)
is_bred = models.BooleanField(default=False)
note = models.TextField(max_length=250, blank=True, null=True)
result = models.BooleanField(default=False)
# Relationship Fields
animal = models.ForeignKey(Animal, related_name='heats', on_delete=models.CASCADE)
created_at = models.DateTimeField(auto_now_add=True, editable=False)
last_updated = models.DateTimeField(auto_now=True, editable=False)
我能够通过这个原始的sql脚本实现所需的结果.但我想要一个django方法.
SELECT
*
FROM
heat
WHERE
heat.created_at != (SELECT MAX((heat.created_at)) FROM heat)
AND heat.animal_id = '2' ORDER BY heat.created_at DESC;
请帮忙.
我试图从html表单中读取一些数据并将其插入数据库.这样做我坚持这个错误"/ nameEmployee /的NameError:全局名称'get_post_param'未定义"; 我会在这里粘贴我的代码.有人可以帮我解决这个问题.
VIEWS.PY
def createEmployee(request):
if request.method == "POST":
userName = get_post_param(request,"userName")
designation = get_post_param(request,"designation")
employeeID = get_post_param(request,"employeeID")
contactNumber = get_post_param(request,"contactNumber")
project = get_post_param(request,"project")
dateOfJoin = get_post_param(request,"dateOfJoin")
EmployeeDetails(userName=userName,designation=designation,employeeID=employeeID,contactNumber=contactNumber,project=project,dateOfJoin=dateOfJoin).save()
return render_to_response('createEmployee.html')
else:
return render_to_response('createEmployee.html')
TEMPLATE.PY
<form action="http://127.0.0.1:8000/createEmployee/" method="POST">
Name: <input type="text" name="userName" /><br />
Designation: <input type="text" name="designation" /><br>
EmployeeID: <input type="text" name="employeeID" /><br>
Contact Number: <input type="text" name="contactNumber" /><br>
Project: <input type="text" name="project" /><br>
Date Of Join: <input type="text" name="dateOfJoin" /><br>
<input type="submit" value="Submit" /><br />
</form>
这是我的Django模型
class author(models.Model):
name = models.CharField('name',max_length=140)
datamode = models.CharField(max_length=1, default='A', choices=DATAMODE_CHOICE)
def __str__(self):
return '%s' % (self.name)
虽然我author在另一个类中使用此类作为外键,如下所示:
class books(models.Model):
NEW_FLAG=(('N','New'),('O','Old'))
name = models.CharField('name',max_length=140)
author = models.ForeignKey(author, blank=True, null=True)
当我在管理员中输入新书详细信息时,它显示:
IntegrityError: Column 'author_id' cannot be null.
django ×10
django-models ×10
django-views ×4
python ×4
python-2.7 ×2
django-admin ×1
django-urls ×1
foreign-keys ×1