124 lines
3.4 KiB
Python
124 lines
3.4 KiB
Python
import uuid
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from django.db import models
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from django.contrib.auth import get_user_model
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# Product in DB vs. product in code
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# DB:
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# - need to define params (+param types) in db -> messy?
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# - get /products/ is easy / automatic
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#
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# code
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# - can have serializer/verification of fields easily in DRF
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# - can have per product side effects / extra code running
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# - might (??) make features easier??
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# - how to setup / query the recurring period (?)
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# - could get products list via getattr() + re ...Product() classes
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# -> this could include the url for ordering => /order/vm_snapshot (params)
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# ---> this would work with urlpatterns
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# Combination: create specific product in DB (?)
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# - a table per product (?) with 1 entry?
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# Orders
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# define state in DB
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# select a price from a product => product might change, order stays
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# params:
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# - the product uuid or name (?) => productuuid
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# - the product parameters => for each feature
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#
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# logs
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# Should have a log = ... => 1:n field for most models!
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class Product(models.Model):
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# override these fields by default
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description = ""
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recurring_period = "not_recurring"
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status = models.CharField(max_length=256,
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choices = (
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('pending', 'Pending'),
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('being_created', 'Being created'),
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('created_active', 'Created'),
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('deleted', 'Deleted')
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)
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def __str__(self):
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return "{}".format(self.name)
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class VMSnapshotProduct(Product):
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price_per_gb_ssd = 0.35
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price_per_gb_hdd = 1.5/100
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sample_ssd = 10
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sample_hdd = 100
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def recurring_price(self):
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return 0
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def one_time_price(self):
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return 0
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@classmethod
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def sample_price(cls):
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return cls.sample_ssd * cls.price_per_gb_ssd + cls.sample_hdd * cls.price_per_gb_hdd
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description = "Create snapshot of a VM"
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recurring_period = "monthly"
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@classmethod
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def pricing_model(cls):
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return """
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Pricing is on monthly basis and storage prices are equivalent to the storage
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price in the VM.
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Price per GB SSD is: {}
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Price per GB HDD is: {}
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Sample price for a VM with {} GB SSD and {} GB HDD VM is: {}.
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""".format(cls.price_per_gb_ssd, cls.price_per_gb_hdd,
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cls.sample_ssd, cls.sample_hdd, cls.sample_price())
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gb_ssd = models.FloatField()
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gb_hdd = models.FloatField()
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class Feature(models.Model):
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uuid = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
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name = models.CharField(max_length=256)
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recurring_price = models.FloatField(default=0)
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one_time_price = models.FloatField()
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product = models.ForeignKey(Product, on_delete=models.CASCADE)
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# params for "cpu": cpu_count -> int
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# each feature can only have one parameters
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# could call this "value" and set whether it is user usable
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# has_value = True/False
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# value = string -> int (?)
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# value_int
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# value_str
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# value_float
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def __str__(self):
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return "'{}' - '{}'".format(self.product, self.name)
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class Order(models.Model):
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uuid = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
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owner = models.ForeignKey(get_user_model(),
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on_delete=models.CASCADE)
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product = models.ForeignKey(Product,
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on_delete=models.CASCADE)
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class VMSnapshotOrder(Order):
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pass
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