How to get the minimum value of an instance of django model - django

Question

I am trying to get the minimum or the lowest value of a model field in django model. The field is room_Price. I am therefore trying to get the minimum of value of this field for each instance of a model. My model are as as follows
class Hotels(models.Model):
name = models.CharField(max_length=255)
address = models.CharField(max_length=255)
city = models.CharField(max_length=255)
country = models.CharField(max_length=255)
mobile_number = models.CharField(max_length=12)
created_at = models.DateTimeField(default=timezone.now)
last_modified = models.DateTimeField(auto_now=True)
description = models.TextField()
slug = models.SlugField(unique=True)
property_photo = models.ImageField(default='default.jpg', upload_to='hotel_photos')
star_rating = models.PositiveIntegerField()
contact_person = models.ForeignKey(UserProfile, on_delete = models.CASCADE, null=True, blank=True,)
class Room(models.Model):
hotel = models.ForeignKey(Hotels,on_delete = models.CASCADE, null=True, blank=True,)
room_photo = models.ImageField(default='default.jpg', upload_to='room_photos')
room_Name = models.CharField(max_length = 200)
room_details = models.CharField(max_length = 500)
room_Capacity = models.PositiveIntegerField(default = 0)
slug = models.SlugField(unique=True)
# guest_numbers = models.IntegerField(default=0)
room_Price= models.PositiveIntegerField(default = 0)
total_Rooms = models.PositiveIntegerField(default=0)
created_at = models.DateTimeField(auto_now_add=True)
updated_at = models.DateTimeField(auto_now=True)
user = models.ForeignKey(UserProfile, on_delete=models.CASCADE, null=True, blank=True,)
More details
From the above models, a hotel can have as many rooms as possible. Now i want to fetch the lowest priced room for each hotel. I tried to use Hotels.objects.aggregate(min_price=Min('room__room_Price')) but it is fetching the overall minimum price of all the hotel rooms. Kindly assist

Answer 1

You can try to add ordering to your model and then find lowest price in a loop:
class Room(models.Model):
...
class Meta:
ordering = ['room_Price']
And filter in views:
lowest_prices = {}
for i in Hotels.objects.all():
price = Room.objects.filter(hotel=i.id)[0].room_Price
lowest_prices[i.name] = price
print(lowest_prices)
I put prices in a dict, but you can do anything you want with it.