django-models

问题 Im doing an application that uses Django in server-side. Im trying to do that: import uuid from base64 import b64decode from django.core.files.base import ContentFile @staticmethod def add_photo(user, person, image_base64): photo = DatabasePersonPhoto() photo.user = user photo.person = person image_data = b64decode(image_base64) image_name = str(uuid.uuid4())+".jpg" photo.image = ContentFile(image_data, image_name) photo.save() return photo This is my Base64 String: data:image/jpeg;base64,/9j

问题 Im doing an application that uses Django in server-side. Im trying to do that: import uuid from base64 import b64decode from django.core.files.base import ContentFile @staticmethod def add_photo(user, person, image_base64): photo = DatabasePersonPhoto() photo.user = user photo.person = person image_data = b64decode(image_base64) image_name = str(uuid.uuid4())+".jpg" photo.image = ContentFile(image_data, image_name) photo.save() return photo This is my Base64 String: data:image/jpeg;base64,/9j

问题 I want to update a bunch of rows in a table to set the id = self.id. How would I do the below? from metadataorder.tasks.models import Task tasks = Task.objects.filter(task_definition__cascades=False) .update(shared_task_id=self.id) The equivalent SQL would be: update tasks_task t join tasks_taskdefinition d on t.task_definition_id = d.id set t.shared_task_id = t.id where d.cascades = 0 回答1: You can do this using an F expression: from django.db.models import F tasks = Task.objects.filter(task

问题 I've built a site that requires membership for some portions. It's a club website so to be a member on the website, you have to be a member in real life. The plan is to have somebody from the Club check for new members (I'll probably have the system send them an email when a user signs up) and then the admin checks the active checkbox under the user's record in the Django admin and saves the user. The problem I'm trying to overcome is we need new, valid users to be notified as to when they

问题 Models.py class Meta: permissions = ( ("can_add_data","can add a new data"), ) This is the custom permission I've created in Models.py and I've also created these users. Users in Django Admin ie., http://localhost:8000/admin How do I give permission to specific users so that I can use @permission_required('myapp.can_add_data') in views.py and also where do I write the snippet? (in which file) I'm a beginner at this so if there are any mistakes please let me know. 回答1: You can assign

问题 Models.py class Meta: permissions = ( ("can_add_data","can add a new data"), ) This is the custom permission I've created in Models.py and I've also created these users. Users in Django Admin ie., http://localhost:8000/admin How do I give permission to specific users so that I can use @permission_required('myapp.can_add_data') in views.py and also where do I write the snippet? (in which file) I'm a beginner at this so if there are any mistakes please let me know. 回答1: You can assign

问题 I'm writing a chat app for a hypothetical social network but when I try to open the chat page I give the following error 'AnonymousUser' object has no attribute 'profile' error . I think there may be problem in the models file but I can't really figure out how to fix it and I'm really confused now!? can anyone give any suggestions?? parts of the chat views.py def index(request): if request.method == 'POST': print request.POST request.user.profile.is_chat_user=True logged_users = [] if request

问题 i am making a blog application for my website with django-2.0 when i run server i see the following error File "C:\Users\User\Desktop\djite\djite\djite\urls.py", line 7, in <module> url(r'^blog/', include('blog.urls', namespace='blog', app_name='blog')), TypeError: include() got an unexpected keyword argument 'app_name' here is my main urls.py from django.contrib import admin from django.conf.urls import url,include urlpatterns = [ url(r'^admin/', admin.site.urls), url(r'^blog/', include(

问题 i am making a blog application for my website with django-2.0 when i run server i see the following error File "C:\Users\User\Desktop\djite\djite\djite\urls.py", line 7, in <module> url(r'^blog/', include('blog.urls', namespace='blog', app_name='blog')), TypeError: include() got an unexpected keyword argument 'app_name' here is my main urls.py from django.contrib import admin from django.conf.urls import url,include urlpatterns = [ url(r'^admin/', admin.site.urls), url(r'^blog/', include(

问题 I am trying to capitalize a number of fields in my django models, when they are saved. Looking at this question, which had this answer: class Blog(models.Model): name = models.CharField(max_length=100) def save(self): self.name = self.name.title() super(Blog, self).save() This works fine, however, in each save, this requires some extra typing, if I want to repeat this multiple times. So I would like to create a function that takes fields as an input and re-saves them as uppercase, during the