I have following models in Django (PostgreSQL):
class Action(models.Model):
actor = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.SET_NULL, null=True, blank=True)
verb = models.CharField(max_length=32)
created_at = models.DateTimeField(auto_now_add=True, db_index=True)
target_object_id = models.CharField(max_length=255, blank=True, null=True, db_index=True)
class Notification(models.Model):
action = models.ForeignKey(Action, on_delete=models.CASCADE, related_name='notifications')
recipient = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE)
is_readed = models.BooleanField(default=False)
Can you help me with building notification feed for a user? A query should return the latest actions for the particular recipient, but do not duplicate actions for the same target_object_id.
Related
I am trying to obtain in a query the data of a client and the contacts he has registered I tried to do it in the following way but it did not work.
class ClientReadOnlySerializer(serializers.ModelSerializer):
clientcontacts = ClientContactSerializer(many=True, read_only=True)
class Meta:
model = Client
fields = "__all__"
Is there any way to make this relationship nested?
these are my models
clients model
# Relations
from apps.misc.models import City, TypeIdentity, TypeCLient, CIIU
from apps.clients.api.models.broker.index import Broker
from apps.authentication.models import User
class Client(models.Model):
id = models.CharField(max_length=255, unique=True,primary_key=True, editable=False)
type_client = models.ForeignKey(TypeCLient, on_delete=models.CASCADE, blank=True)
type_identity = models.ForeignKey(TypeIdentity, on_delete=models.CASCADE, blank=True)
document_number = models.CharField(max_length=255, blank=True, unique=True)
first_name = models.CharField(max_length=255, blank=True, null=True)
last_name = models.CharField(max_length=255, blank=True, null=True)
social_reason = models.CharField(max_length=255, blank=True, null=True)
city = models.ForeignKey(City, on_delete=models.CASCADE, blank=True)
address = models.CharField(max_length=255, blank=True)
email = models.CharField(max_length=255, blank=True, unique=True)
phone_number = models.CharField(max_length=255, blank=True, unique=True)
ciiu = models.ForeignKey(CIIU, on_delete=models.CASCADE, blank=True)
broker = models.ForeignKey(Broker, on_delete=models.CASCADE, blank=True)
user = models.ForeignKey(User, on_delete=models.CASCADE, blank=True)
income = models.SmallIntegerField(blank=True, default=0)
state = models.BooleanField(default=True)
created_at = models.DateTimeField(auto_now_add=True)
updated_at = models.DateTimeField(null=True, default=None)
client contacts model
# Relations
from apps.clients.api.models.index import Client
class ClientContact(models.Model):
id = models.CharField(max_length=255, primary_key=True, unique=True, editable=False)
client = models.ForeignKey(Client, on_delete=models.CASCADE)
first_name = models.CharField(max_length=255)
last_name = models.CharField(max_length=255)
phone_number = models.CharField(max_length=255)
state = models.BooleanField(default=True)
created_at = models.DateTimeField(auto_now_add=True)
updated_at = models.DateTimeField(null=True, blank=True, default=None)
after some research I came up with a solution that doesn't seem very practical, what I did was to create a method in the serializer that queries the client's contacts as follows
class ClientReadOnlySerializer(serializers.ModelSerializer):
contacts = serializers.SerializerMethodField(method_name='get_contacts')
class Meta:
model = Client
fields = "__all__"
extra_fields = ['contacts']
def get_contacts(self, obj):
contacts = ClientContact.objects.filter(client=obj)
serializer = ClientContactSerializer(contacts, many=True)
return serializer.data
using the model and the serializer of the contact model I made a query which I added in an extra field of the customer serializer, if someone knows how to make this process more optimal please reply.
models:
class FullNameMixin(models.Model):
name_id = models.BigAutoField(primary_key = True, unique=False, default=None, blank=True)
first_name = models.CharField(max_length=255, default=None, null=True)
last_name = models.CharField(max_length=255, default=None, null=True)
class Meta:
abstract = True
class Meta:
db_table = 'fullname'
class User(FullNameMixin):
id = models.BigAutoField(primary_key = True)
username = models.CharField(max_length=255, unique=True)
email = models.CharField(max_length=255, unique=True)
token = models.CharField(max_length=255, unique=True, null=True, blank=True)
password = models.CharField(max_length=255)
role = models.IntegerField(default=1)
verified = models.BooleanField(default=False)
created_at = models.DateTimeField(auto_now_add=True, null=True, blank=True)
updated_at = models.DateTimeField(auto_now=True, null=True, blank=True)
def __str__(self):
return self.username
class Meta:
db_table = 'cga_user'
class Profile(FullNameMixin):
id = models.BigAutoField(primary_key = True)
birthday = models.DateTimeField(null=True, blank=True)
country = models.CharField(max_length=255, null=True, blank=True)
state = models.CharField(max_length=255, null=True, blank=True)
postcode = models.CharField(max_length=255, null=True, blank=True)
phone = models.CharField(max_length=255, null=True, blank=True)
profession_headline = models.CharField(max_length=255, null=True, blank=True)
image = models.ImageField(upload_to=get_upload_path, null=True, blank=True)
profile_banner = models.ImageField(upload_to=get_upload_path_banner, null=True, blank=True)
cga_user = models.OneToOneField(User, null=True, blank=True, on_delete=models.CASCADE, related_name="profile")
gender = models.CharField(
max_length=255, blank=True, default="", choices=USER_GENDER_CHOICES
)
created_at = models.DateTimeField(auto_now_add=True, null=True, blank=True)
updated_at = models.DateTimeField(auto_now=True, null=True, blank=True)
class Meta:
db_table = 'profile'
When i am creating Profile from django admin panel getting below error.
e
filename = self.upload_to(instance, filename)
File "/Users/soubhagyapradhan/Desktop/upwork/africa/backend/api/model_utils/utils.py", line 7, in get_upload_path
instance.user,
File "/Users/soubhagyapradhan/Desktop/upwork/africa/backend/env/lib/python3.8/site-packages/django/db/models/fields/related_descriptors.py", line 421, in __get__
raise self.RelatedObjectDoesNotExist(
api.models.FullNameMixin.user.RelatedObjectDoesNotExist: Profile has no user.
[24/Jul/2021 13:49:51] "POST /admin/api/profile/add/ HTTP/1.1" 500 199997
please take a look how can i fix this.
Note: User model creation working but, profile not working
I checked in drf and django admin panel .
both place not working.
The problem here is that you are declaring a User model which is in fact just a model. That's not how it works.
The User is a special type of model and if you want to change it you have to extend the AbstractUser class.
Alternatively you can connect to it via one-to-one classes in the classic user-profiles approach.
But here you are creating a user model that (besides using the reserved word 'User') has none of the requirements necessary to be treated as a user who can be authenticated and that can instantiate sessions.
> Example of a simple user-profiles architecture
> Working with User objects - Django Docs (i particularly recommend this one)
I would recommend you to read-up on django user authentication.
I have three models : Domain Topic Post
Topic has a foreign key to Domain and Post has a foreign key to Topic.
Post has a field updated_on.
I want to annotate last_updated field in Domain queryset which would contain the latest post object from Post .
Edit 1: Added models definition:
class Board(models.Model):
name = models.CharField(max_length=30, unique=True)
description = models.CharField(max_length=50)
creation_time = models.DateTimeField(auto_now_add=True)
class Topic(models.Model):
subject = models.CharField(max_length=300, unique=True)
board = models.ForeignKey(Board, on_delete=models.SET_NULL, related_name='topics', null=True)
created_by = models.ForeignKey(User, on_delete=models.SET_NULL, related_name='topics', null=True)
created_on = models.DateTimeField(auto_now_add=True)
views = models.PositiveIntegerField(default=0)
class Post(models.Model):
message = models.CharField(max_length=5000)
created_by = models.ForeignKey(User, on_delete=models.SET_NULL, related_name='posts', null=True)
created_on = models.DateTimeField(auto_now_add=True)
topic = models.ForeignKey(Topic, on_delete=models.SET_NULL, related_name='posts', null=True)
updated_on = models.DateTimeField(default=timezone.now)
How do I go about creating a message app, between users. What's the business logic for creating the model? All I can think of was like this:
models.py
class Message(models.Model):
description = models.TextField()
date_added = models.DateTimeField(default=datetime.now)
sender = models.ForeignKey(User)
recipient = models.ForeignKey(User)
I am not very sure if this is the way to go. If you could kindly guide me on how to get started, will be very thank full. Thank you!
My variant for common cases:
from django.utils.translation import ugettext_lazy as _
class Message(models.Model):
"""
A private message from user to user
"""
subject = models.CharField(_("Subject"), max_length=120, blank=True)
body = models.TextField(_("Body"))
sender = models.ForeignKey(settings.AUTH_USER_MODEL, related_name='sender_messages', verbose_name=_("Sender"), )
recipient = models.ForeignKey(settings.AUTH_USER_MODEL, related_name='receiver_messages', null=True, blank=True, verbose_name=_("Recipient"))
parent_msg = models.ForeignKey('self', related_name='next_messages', null=True, blank=True, verbose_name=_("Parent message"))
sent_at = models.DateTimeField(_("sent at"), null=True, blank=True)
read_at = models.DateTimeField(_("read at"), null=True, blank=True)
replied_at = models.DateTimeField(_("replied at"), null=True, blank=True)
sender_deleted_at = models.DateTimeField(_("Sender deleted at"), null=True, blank=True)
recipient_deleted_at = models.DateTimeField(_("Recipient deleted at"), null=True, blank=True)
ip = models.GenericIPAddressField(verbose_name=_('IP'), null=True, blank=True)
user_agent = models.CharField(verbose_name=_('User Agent'), blank=True, max_length=255)
Send an email alert whenever newly created profile matches to his search term. I have two module recruiter and seeker. Recruiter can posted their jobs and Seeker can posted their profile. If recruiter searches the seeker's profile based on city name, keyskills,industry type etc.. The searched result can be saved because for future use. If any new seeker's profile matches that searched result which is saved previously it automatically send email to recruiter. This alert has been send everytime when new seeker can matched that recruiter search terms.
Recruiter table
class jobs(models.Model):
user = models.ForeignKey(User)
title = models.CharField(max_length=100)
jobsummary = models.TextField()
industry = models.CharField(max_length=100)
functionalarea = models.CharField(max_length=100)
min_exp = models.IntegerField(default=0)
max_exp = models.IntegerField(default=0)
class employerkeyskills(models.Model):
user = models.ForeignKey(User)
job=models.ForeignKey(jobs, unique=False)
keyskills=models.CharField(max_length=50)
class RecSaveSearch(models.Model):
user = models.ForeignKey(User)
employer=models.ForeignKey(User,unique=False)
searchname=models.CharField(max_length=100,blank=True)
savedsearch=models.CharField(max_length=400, blank=True)
Jobseeker Profile Table
class JSPersonal(models.Model):
user = models.ForeignKey(User)
name=models.CharField(max_length=100, blank=True, null=True)
email = models.EmailField(max_length=100, blank=True, null=True)
city = models.CharField(max_length=100, blank=True, null=True)
work_expyears = models.CharField(max_length=100, blank=True, null=True)
work_expmonths = models.CharField(max_length=100, blank=True, null=True)
salaryrange = models.CharField(max_length=50, blank=True, null=True)
industry = models.CharField(max_length=100, blank=True, null=True)
class JSSkills(models.Model):
user = models.ForeignKey(User)
skill = models.CharField(max_length=100, blank=True, null=True)
version = models.CharField(max_length=100, blank=True, null=True)
lastused = models.CharField(max_length=100, blank=True, null=True)
skillyear = models.CharField(max_length=100, blank=True, null=True)
skillmon = models.CharField(max_length=100, blank=True, null=True)