209 lines
6.5 KiB
Python
209 lines
6.5 KiB
Python
from django.db import models
|
|
from django.utils import timezone
|
|
import math
|
|
|
|
from config.extras import DateUUIDField
|
|
from config.extras import BREWFATHER_APP_ROOT
|
|
|
|
import logging
|
|
logger = logging.getLogger('django')
|
|
|
|
|
|
def average(lst):
|
|
return sum(lst) / len(lst)
|
|
|
|
|
|
class AvailableYeastManager(models.Manager):
|
|
""" Special manager for filtering out pitched yeast."""
|
|
|
|
def get_queryset(self):
|
|
return super(AvailableYeastManager, self)\
|
|
.get_queryset().filter(pitched=False)
|
|
|
|
|
|
class CustomModel(models.Model):
|
|
""" Custom model class with default fields to use. """
|
|
created_date = models.DateTimeField(default=timezone.now)
|
|
|
|
class Meta:
|
|
abstract = True
|
|
|
|
|
|
class Manufacturer(CustomModel):
|
|
""" Store manufacturer data for various yeast strains."""
|
|
name = models.CharField(max_length=100)
|
|
website = models.URLField(max_length=200, blank=True, null=True)
|
|
|
|
def __str__(self):
|
|
# Return a string that represents the instance
|
|
return self.name
|
|
|
|
|
|
class Strain(CustomModel):
|
|
"""
|
|
Store individual yeast strain data. :model:`yeast.Manufacturer`.
|
|
"""
|
|
name = models.CharField(max_length=100)
|
|
long_name = models.CharField(max_length=100, blank=True)
|
|
manufacturer = models.ForeignKey(Manufacturer, on_delete=models.PROTECT)
|
|
|
|
@property
|
|
def batches_available(self):
|
|
return [x for x in Propogation.objects.all()
|
|
if not x.consumed and x.strain == self]
|
|
|
|
def __str__(self):
|
|
# Return a string that represents the instance
|
|
return '{}: {}'.format(self.manufacturer.name, self.name)
|
|
|
|
|
|
class Storage(CustomModel):
|
|
"""
|
|
Data for methods of yeast storage. Used for calculating viability
|
|
in :model:`yeast.Yeast`.
|
|
"""
|
|
name = models.CharField(max_length=100)
|
|
viability_loss = models.DecimalField(max_digits=6, decimal_places=4)
|
|
viability_interval = models.IntegerField(default=30)
|
|
|
|
def __str__(self):
|
|
# Return a string that represents the instance
|
|
return self.name
|
|
|
|
|
|
class Propogation(CustomModel):
|
|
"""
|
|
Stores a batch of :model:`yeast.Yeast` of a single :model:`yeast.Strain`.
|
|
|
|
Can be a single purchased pack, or multiple vials
|
|
to be frozen from a starter.
|
|
"""
|
|
|
|
BATCH_TYPES = {
|
|
'ST': 'Store',
|
|
'PR': 'Propogated',
|
|
'SL': 'Slurry',
|
|
}
|
|
id = DateUUIDField(primary_key=True)
|
|
parent = models.ManyToManyField('Yeast', related_name='+', blank=True)
|
|
production_date = models.DateField()
|
|
strain = models.ForeignKey(Strain, on_delete=models.PROTECT, default=0)
|
|
source = models.CharField(max_length=3, choices=BATCH_TYPES, default='ST')
|
|
source_batch = models.ForeignKey(
|
|
'beer.Batch', null=True, blank=True, on_delete=models.PROTECT)
|
|
notes = models.TextField(max_length=500, blank=True, null=True)
|
|
|
|
def save(self, *args, **kwargs):
|
|
super(Propogation, self).save(*args, **kwargs)
|
|
if self.source_batch:
|
|
relate_samples = [x for x in Yeast.objects.all()
|
|
if x.pitched_batch == self.source_batch]
|
|
for sample in relate_samples:
|
|
self.parent.add(sample)
|
|
|
|
@property
|
|
def age(self):
|
|
return int(average([x.age for x in Yeast.available.all()
|
|
if x.propogation == self]))
|
|
|
|
@property
|
|
def max_viability(self):
|
|
return int(max([x.viability for x in Yeast.available.all()
|
|
if x.propogation == self]) * 100)
|
|
|
|
@property
|
|
def min_viability(self):
|
|
return int(min([x.viability for x in Yeast.available.all()
|
|
if x.propogation == self]) * 100)
|
|
|
|
@property
|
|
def generation(self):
|
|
return int(average([x.generation_num for x in Yeast.available.all()
|
|
if x.propogation == self]))
|
|
|
|
@property
|
|
def beer_name(self):
|
|
if self.source_batch:
|
|
return self.source_batch.brewfather_name
|
|
|
|
@property
|
|
def beer_num(self):
|
|
if self.source_batch:
|
|
return self.source_batch.brewfather_num
|
|
|
|
@property
|
|
def beer_url(self):
|
|
if self.source_batch:
|
|
return '{}/tabs/batches/batch/{}'.format(
|
|
BREWFATHER_APP_ROOT,
|
|
self.source_batch.brewfather_id
|
|
)
|
|
|
|
@property
|
|
def consumed(self):
|
|
return not len(self.remaining_samples) > 0
|
|
|
|
@property
|
|
def remaining_samples(self):
|
|
return [x for x in Yeast.available.all() if x.propogation == self]
|
|
|
|
@property
|
|
def used_samples(self):
|
|
return [x for x in Yeast.objects.all()
|
|
if x.propogation == self and x.pitched]
|
|
|
|
def __str__(self):
|
|
# Return a string that represents the instance
|
|
return '{} [{}]'.format(
|
|
self.strain,
|
|
self.production_date.strftime("%Y-%m-%d")
|
|
)
|
|
|
|
|
|
class Yeast(CustomModel):
|
|
"""
|
|
Store an individual sample of yeast.
|
|
"""
|
|
id = DateUUIDField(primary_key=True)
|
|
propogation = models.ForeignKey(Propogation, on_delete=models.CASCADE)
|
|
generation_num = models.IntegerField(default=0)
|
|
storage = models.ForeignKey(Storage, on_delete=models.CASCADE)
|
|
cellcount = models.IntegerField(default=100)
|
|
pitched = models.BooleanField(default=False)
|
|
date_pitched = models.DateField(blank=True, null=True)
|
|
pitched_batch = models.ForeignKey(
|
|
'beer.Batch', null=True, blank=True, on_delete=models.CASCADE)
|
|
data_web = models.URLField(blank=True, null=True)
|
|
lot_number = models.CharField(max_length=15, blank=True, null=True)
|
|
notes = models.TextField(max_length=500, blank=True, null=True)
|
|
objects = models.Manager()
|
|
available = AvailableYeastManager()
|
|
|
|
@property
|
|
def name(self):
|
|
return '{} {}'.format(self.id, self.propogation.strain.name)
|
|
|
|
@property
|
|
def age(self):
|
|
"""Return the age in days since the sample was propogated."""
|
|
|
|
if self.pitched:
|
|
end_date = self.date_pitched
|
|
else:
|
|
end_date = timezone.now().date()
|
|
|
|
return abs((self.propogation.production_date-end_date).days)
|
|
|
|
@property
|
|
def viability(self):
|
|
"""Return the viability based on age and storage method
|
|
(:model:`yeast.Storage`).
|
|
"""
|
|
return 0.97 * math.exp(self.age
|
|
* math.log(1-self.storage.viability_loss)
|
|
/ self.storage.viability_interval)
|
|
|
|
def __str__(self):
|
|
# Return a string that represents the instance
|
|
return '{} {}'.format(self.id, self.propogation.strain.name)
|