25 lines
1.0 KiB
Python
25 lines
1.0 KiB
Python
from django.db import models
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from .category import FormulaCategory
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class Symbol(models.Model):
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symbol_id = models.CharField(max_length=10) # np. F
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name = models.CharField(max_length=255)
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unit = models.CharField(max_length=50)
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description = models.TextField(blank=True)
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category = models.ForeignKey(FormulaCategory, on_delete=models.PROTECT)
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tags = models.JSONField(default=list, blank=True)
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revision = models.PositiveIntegerField(default=1)
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code = models.CharField(max_length=10, unique=True, editable=False)
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meta = models.TextField(blank=True) # np. meta-opis dla SEO / edytora
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#Zaspis zmiennej z code
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def save(self, *args, **kwargs):
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if not self.code:
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count = Symbol.objects.filter(category=self.category).count() + 1
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self.code = f"{self.category.prefix:02d}{count:02d}{self.revision:02d}"
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super().save(*args, **kwargs)
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#Definiowanie czym jest "self"
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def __str__(self):
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return f"{self.name} ({self.symbol_id}) [{self.code}]" |