I have scenario in which a user can have multiple books. I can create two different models for user and books and relate them using foreign keys (or one-to-many will be right way ?).
I have created a django forms for User model but when i do like this {{form.as_p}} in templates only user model fields is shown not books field.
I want that with user fields my books model filed also displayed (like book names field more then once because he can have multiple books) , Please let me know if it is possible using django forms/models or I have to user simple html forms with jquery and then save data in models.
Thanks
EDIT:
my models :
class Product(models.Model):
categories = models.CharField(max_length=5, choices = settings.CATEGORIES)
name = models.CharField(max_length=100)
description = models.TextField()
currency = models.CharField(max_length=5, choices = settings.CURRENCY)
status = models.BooleanField(default=True)
def __unicode__(self):
return self.name
class Prices(models.Model):
products = models.ForeignKey(Product)
prices = models.IntegerField()
def __unicode__(self):
return self.id
if you are creating a form for Prices, try putting this in your model form:
products = forms.ModelMultipleChoiceField(queryset=Product.objects.all())
I think you should add required fields in meta class such as
class ThreadForm(ModelForm):
class Meta:
model = Thread
fields = ('Books', 'User')
Please understand the work flow to use foreign keys in model form here.
Related
I have following models,
class User(models.Model):
name = models.CharField(max_length=255)
...
class InsuranceProfile(models.Model):
user = models.ForeignKey(User, on_delete=models.CASCADE)
...
class ProductExpertiseMaster(models.Model):
class Meta:
db_table = 'product_expertise_master'
name = models.CharField(max_length=255)
main_category = models.CharField(max_length=255)
class UserProductExpertise(models.Model):
user = models.ForeignKey(User, on_delete=models.DO_NOTHING)
product_expertise = models.ForeignKey(ProductExpertiseMaster, on_delete=models.DO_NOTHING)
So what I am trying to do is I want to filter records based on various fields some of the belong to User model & some of them belong to the InsuranceProfile model.I am filter the records based on User & InsuranceProfile model which is working fine. Now i want to add one more filter which will be based on the UserProductExpertise model.I want to get all the InsuranceProfiles with User details who have some matching condition with product expertise entries in UserProductExpertise model. Any help would appreciated.
You can try like this using __isnull:
InsuranceProfile.objects.filter(user__userproductexpertise__isnull=False)
It will return all the users who has an entry in in UserProductExpertise model. For querying, you need to use all lowercase of the model name, (ie userproductexpertise) and add __isnull at the end of it.
I think you should make some changes in your models before proceeding further.
UserProductExpertise model is the bridge table between ProductExpertiseMaster and User, which provides a many-to-many relationship. If you won't add additional fields to UserProductExpertise model, you can drop it and define user relation in ProductExpertiseMaster model.
If you prefer using seperate model for this relationship, on_delete=models.DO_NOTHING is prone to errors, you can change it to models.CASCADE
Here is an example with many-to-many relation:
class User(models.Model):
name = models.CharField(max_length=255)
class InsuranceProfile(models.Model):
user = models.ForeignKey(User, on_delete=models.CASCADE)
content = models.CharField(("Content"), max_length=500)
class ProductExpertiseMaster(models.Model):
class Meta:
db_table = 'product_expertise_master'
name = models.CharField(max_length=255)
main_category = models.CharField(max_length=255)
user = models.ManyToManyField(User, verbose_name=("Users"), related_name="expertises")
For filtering your query:
InsuranceProfile.objects.filter(user__expertises__isnull=False)
I have a form where I want to display multiple select foreign key field.
Form.py
class ManagerGroupForm(forms.ModelForm):
class Meta:
model = UserGroup
fields = ['usergroup_group']
Models.py
class UserGroup(models.Model):
usergroup_user = models.ForeignKey(User, on_delete=models.CASCADE)
usergroup_group = models.ForeignKey(Groups, on_delete=models.CASCADE)
In my form I want to select usergroup_group multiple times.
You can only save a single object to ForeignKey field if you want to add multiple groups to a single user use a many-to-many field.
class UserGroup(models.Model):
user = models.ForeignKey(User, on_delete=models.CASCADE)
group = models.ManyToManyField(Groups)
Or
If want same table as you created, you can use Django formsets, Please refer the docs:https://docs.djangoproject.com/en/2.1/topics/forms/formsets/
So I have been searching all around the internet for a full example of how to user AbstractUser when u have at least 2 different models. Didn't find anything conclusive.. at least that would work on latest version of Django (2.0.1).
I have 2 models, teacher and student, and registration needs to be different. Besides username, email, name and surname, I need for example, for the student, to upload a profile picture, email, phone, student_ID. And for teacher, bio, academic title and website. Did I start good ? What is the right approach ?
class Profile(AbstractUser):
photo = models.ImageField(upload_to='students_images')
email = models.EmailField()
phone = models.CharField(max_length=15, )
class Student(Profile):
student_ID = models.CharField(unique=True, max_length=14,
validators=[RegexValidator(regex='^.{14}$',
message='The ID needs to be 14 characters long.')])
def __str__(self):
return self.name
class Teacher(Profile):
academic_title = models.CharField(max_length=30)
bio = models.TextField()
website = models.URLField(help_text="E.g.: https://www.example.com", blank=True)
Your goals can be accomplished using a 'Profile' pattern. You don't necessarily need to use a custom user model for this. But you need to have a single common model to for authentication; you can use the builtin django user for this or a custom class... Your Student and Teacher models should be OnetoOne relationships. This is the recommended solution per the documentation.
If you wish to store information related to User, you can use a OneToOneField to a model containing the fields for additional information. This one-to-one model is often called a profile model, as it might store non-auth related information about a site user.
In your case, you may do something like this:
class StudentProfile(models.Model):
user = models.OneToOneField('User', related_name='student_profile')
# additional fields for students
class TeacherProfile(models.Model):
user = models.OneToOneField('User', related_name='teacher_profile')
# additional fields for teachers
Then you can create your registration forms based on these profile models.
class StudentResistrationForm(forms.ModelForm):
class Meta:
model = StudentProfile
fields = (...)
class TeacherRegistrationForm(forms.ModelForm):
class Meta:
model = TeacherProfile
fields = (...)
You can create the user instance to which the profile is related to at the same time you create the profile. You might do this with formsets, for example.
add
class Meta:
abstract = True
to profile model
and change AbstractUser to models.Model
I need some basic help with the django admin site. What I basically want to do is to be able to populate an inline with choices from the database. For example consider the following models:
class Item(models.Model):
description = models.CharField(max_length=100)
class Category(models.Model):
name = models.CharField(max_length=100)
item = models.ForeignKey(Item, on_delete=models.CASCADE, null=True, blank=True)
And in admin.py I have the following setup:
class CategoryAdminForm(forms.ModelForm):
name = forms.ChoiceField(choices = category_service.get_all_categories())
class CategoryInline(admin.TabularInline):
model = Category
form = CategoryAdminForm
class ItemAdmin(admin.ModelAdmin):
inlines = [CategoryInline]
admin.site.register(Item, ItemAdmin)
admin.site.register(Category)
What I want to be able to do is to insert categories into db, and when I want to insert an item, the categories inline to be populated with categories from the db.
With the current setup it is not working. It says that category is not an iterable object. What am I missing here?
You should replace your ChoiceField with a ModelChoiceField. They allow you to specify a queryset to populate the choices.
category = forms.ModelChoiceField(queryset=Category.objects.all(), empty_label="(Nothing)")
I have the following code:
class Item(models.Model):
name = models.CharField(max_length=100)
keywords = models.CharField(max_length=255)
type = models.ForeignKey(Type)
class Meta:
abstract = True
class Variant(models.Model):
test_field = models.CharField(max_length=255)
class Product(Item):
price = models.DecimalField(decimal_places=2, max_digits=8,null=True, blank=True)
brand = models.ForeignKey(Brand)
variant = models.ForeignKey(Variant)
def get_fields(self):
return [(field.name, field.value_to_string(self)) for field in Product._meta.fields]
def __unicode__(self):
return self.name
Im using Grappelli.
I want my Product to have multiple Variations. Should I use a manytomanyfield?
I want to be able to add Variants to my Product directly in the Admin. Now I get an empty dropwdown with no variants(because they doesnt exists).
I thought Django did this automatically when u specified a Foreign Key?
How can I get the Variant fields to display directly on my Product page in edit?
I've read someting about inline fields in Admin?
Well, it's the other way around :)
1/ Place the foreign key field in your Variant, not in your Product (what you describe is actually a OneToMany relationship).
2/ Link the Variant to your Product in the relative ProductAdmin in admin.py as an inline (i.e VariantInline).
See the docs for further informations : https://docs.djangoproject.com/en/1.6/ref/contrib/admin/#inlinemodeladmin-objects
Hope this helps !
Regards,