django-models

问题 Installed django-smart-selects (pip install django-smart-selects) and is not working on django version 3.0.1 I configured using the official installation guide. enter code here $ python manage.py runserver Watching for file changes with StatReloader Exception in thread django-main-thread: Traceback (most recent call last): File "/usr/lib/python3.7/threading.py", line 917, in _bootstrap_inner self.run() File "/usr/lib/python3.7/threading.py", line 865, in run self._target(*self._args, **self.

问题 Installed django-smart-selects (pip install django-smart-selects) and is not working on django version 3.0.1 I configured using the official installation guide. enter code here $ python manage.py runserver Watching for file changes with StatReloader Exception in thread django-main-thread: Traceback (most recent call last): File "/usr/lib/python3.7/threading.py", line 917, in _bootstrap_inner self.run() File "/usr/lib/python3.7/threading.py", line 865, in run self._target(*self._args, **self.

问题 I have two django models like these: class Place(models.Model): name = models.CharField(max_length=50) address = models.CharField(max_length=80) class Restaurant(Place): serves_hot_dogs = models.BooleanField() serves_pizza = models.BooleanField() I had previously created a Place instance, like this: sixth_ave_street_vendor = Place(name='Bobby Hotdogs', address='6th Ave') sixth_ave_street_vendor.save() Now bobby has upgraded his street vendor to a restaurant. How can I do that in my code?! Why

问题 I'm working on an online form builder tool (specifically for insurance agents). One of the things we would like to offer our customers is to have pre-built forms for common products (auto, home, life, etc) be available by default, but still modifiable. Under normal circumstances, I would simply create the forms in my development environment, then create a fixture containing these forms, and run syncdb on all the live sites. Unfortunately that isn't a possibility, as some of our customers

问题 I'm working on an online form builder tool (specifically for insurance agents). One of the things we would like to offer our customers is to have pre-built forms for common products (auto, home, life, etc) be available by default, but still modifiable. Under normal circumstances, I would simply create the forms in my development environment, then create a fixture containing these forms, and run syncdb on all the live sites. Unfortunately that isn't a possibility, as some of our customers

问题 I tried the verbose name when registering it on my admin.py so that it would appear as Data instead of Datas but that did not work. admin.site.register(Data, verbose_name="Data") Any ideas? 回答1: You should be setting verbose_name_plural in that case. Docs here. Also you should be setting it on the model's Meta options of your model (docs here). Example: class MyModel(models.Model): # my fields class Meta: verbose_name_plural = "PluralForMyModel" 来源： https://stackoverflow.com/questions

问题 I'm learning Django and trying to get the hang of querying foreign keys across a bridging table. Apologies if this is a duplicate, I haven't been able to find the answer by searching. I've got models defined as follows class Place(models.Model): id = models.IntegerField(primary_key=True) name = models.CharField(max_length=100) class PlaceRef(models.Model): place = models.ForeignKey(Place) # many-to-one field entry = models.ForeignKey(Entry) # many-to-one field class Entry(models.Model): id =

问题 I have an app that will one day allow front-end crud, which will create the slug with slugify . Right now though, all the object creation is being done in the admin area and I was wondering if there is a way to auto generate slugs while creating and saving an object from within admin? Here is the method for slugify for the front-end; not sure if its even relevant. Thank you. def create_slug(instance, new_slug=None): slug = slugify(instance.title) if new_slug is not None: slug = new_slug qs =

问题 I have a production web project running with a decent amount of data in the MySQL db. I am trying to update the database with some changes to an app called "enterlink." I've made new elements in the existing models and created new models altogether. Before this migration, I have never touched the schema of the db since originally running syncdb to create it. When I run: "python manage.py makemigrations enterlink" the below output appears(pic). My question is, why is this happening? The DB

问题 If I have a simple Django model like: from model_utils import Choices class Art(models.Model): CATEGORIES = Choices( (1, 'DIGITAL_ART', 'Digital Art'), (2, 'MULTIMEDIA', 'Multimedia'), ) title = models.TextField() category = models.PositiveSmallIntegerField( db_index=True, choices=CATEGORIES, blank=True, null=True ) How can I use SearchVector in postgres to allow for searching on both the title and categories fields? E.g. so "Some Book Digital Art" would query over both the title and