Questions tagged [django-model-field]
112 questions
0
votes
1 answer
How can i update the field of a model from another model field in django?
I have two models. DepartmentGoal with a field 'scores' and Task also with a field 'scores' and a foreign departmentgoal.
What I want is; If I allocate scores to DepartmentGoal, scores allocated to Task should subtract from scores of DepartmentGoal…
Thaddeaus Iorbee
- 63
- 9
0
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1 answer
view images uploaded from admin on html in django
I am learning to write a Django app which will fetch all images from os.path.join(BASE_DIR, 'media_root', 'uploads') and show it on html page.
But its not working like so.
admin.py
from .models import Experience
# Register your models…
nish
- 1,008
- 4
- 17
- 34
0
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0 answers
django models, NOT NULL constraint failed on foreignKey, even tough i put null=True in my model class
I implemented the user model and authentication first and added some users to the database. Then i added two more fields to the models, "city" and "Company", and set foreignKey relations among them. It's ok if a user i create through admin site has…
Apoorva Shridhar
- 147
- 14
0
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1 answer
Django get model datefield value
class Bla(Case):
def __init__(self, model, field, condition=None, then=None, **lookups):
la = model._meta.get_field(field).__str__
returns
>
How do I get the value of…
24thDan
- 113
- 1
- 9
0
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1 answer
How to use a Bootstrap 5 class (form-check) with Django 3.2.2?
I am learning Django and I want to use the form-check Bootstrap class for a checkbox but it isn't working correctly.
This is the code of my file vaccines_form.html:
{{ form.vacuna }}
This code of my file forms.py works fine:
widgets = {
…
Roby Sottini
- 2,117
- 6
- 48
- 88
0
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0 answers
django signals does not save m2m model field
// signals.py
@receiver(pre_save, sender=AcademicLesson)
def take_attendance(sender, instance, **kwargs):
new_file = instance.class_img
if new_file:
sub = instance.sub_id
# this for loops gives all student from each…
Meet Patel
- 1
- 1
0
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1 answer
django uuid or hashid field for primary keys? and how to prefix the generated ids with say "cust_"
I am currently using django-shortuuidfield to generate a unique UUID primary key on the Customer model as shown below
class Customer(models.Model):
customer_id = ShortUUIDField()
user = models.ForeignKey(User, on_delete=models.CASCADE)
…
Abishek
- 369
- 4
- 21
0
votes
1 answer
Create django model with as many fields as an integer in other field
I have the following model in django
class params(models.Model):
name = models.CharField(max_length=30, default = 'no_name')
cs_n = models.IntegerField(default=16)
alt_n = models.IntegerField(default=2)
opt_out =…
Daniel Pérez
- 51
- 1
- 2
0
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1 answer
How to use on_delete CASCADE for some objects and ondelete DO_NOTHING for others in djando models
I have a Django model that refers to itself as below:
parent = models.ForeignKey('self', ...)
I need to act in some situations as on_delete=models.CASCADE and in other situations as on_delete=models.DO_NOTHING.
How can I do that?
Bijan Mohammadpoor
- 99
- 3
- 11
0
votes
1 answer
I need help in choosing relevant field for my django models , want a field like a list which can contain multiple items
I'm working on a project where a user can add an event, and another user can enroll themself in that event. I want to add a user's name to the list whenever they enroll in the event.
My model:
class Event(models.Model):
Topic = CharField
…
0
votes
1 answer
Django reverse (on_delete) protection on a model instance
Is is possible to protect a model in a reverse relationship. For instance in the models below:-
class Foo(models.Model):
foo_field1 = models.CharField(max_length=56, unique=True)
class Bar(models.Model):
bar_field1 = models.ForeignKey(Foo,…
Asif
- 23
- 6
0
votes
1 answer
Creating a custom function in model to compare two foreign key max timestamps
In my Django project, I am attempting to create a custom model field that relies on comparing the values of two reverse foreign key timestamps.
In this toy example, I operate some car dealerships. Cars are hired out to folks but need to be…
William
- 171
- 1
- 12
0
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0 answers
Django - size of ArrayField based on a field value of a related model
I have 2 models: Report and STO with a one-to-many relationship between them, so a STO can have many related reports.
STO model
class STO(TerminableWithTerminableRelatedModel):
name = models.CharField(_('name'), unique=True, blank=False,…
dc_Bita98
- 851
- 2
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0
votes
1 answer
Is django model field lookup_type 'contains' case-sensitive or insensitive..?
As per documentation 'contains' field lookup is case-sensitive and 'icontains' is case-Insensitive, but I don't see any difference while i'm querying it.
>>> from users.models import SnetUser
>>>…
ivardu
- 179
- 2
- 15
0
votes
1 answer
Is there a way to pass the value of a model field as a parameter to models.ImageField(storage=function) within same Model
class StorageModel(models.Model):
user = models.ForeignKey(Profile, on_delete=models.CASCADE, related_name="profile", null=False)
file_meta = models.ImageField(storage=UserDataStorage(profile=user), blank=False, null=False)
class…
ishwor kafley
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