Add nutrition to model.

cookbook/models.py

@@ -361,3 +361,43 @@ class ViewLog(models.Model):
 
     def __str__(self):
         return self.recipe.name
+
+
+class NutritionInformation(models.Model):
+    recipe = models.ForeignKey(Recipe, on_delete=models.CASCADE)
+    created_by = models.ForeignKey(User, on_delete=models.CASCADE)
+    created_at = models.DateTimeField(auto_now_add=True)
+
+    def __str__(self):
+        return f'Nutrition {self.recipe}'
+
+
+class NutritionUnit(models.Model):
+    name = models.CharField(max_length=128)
+    short = models.CharField(max_length=16)
+    created_by = models.ForeignKey(User, on_delete=models.CASCADE)
+    created_at = models.DateTimeField(auto_now_add=True)
+
+    def __str__(self):
+        return f'{self.name} ({self.short})'
+
+
+class NutritionType(models.Model):
+    type = models.CharField(max_length=128)
+    unit = models.ForeignKey(NutritionUnit, on_delete=models.CASCADE)
+    created_by = models.ForeignKey(User, on_delete=models.CASCADE)
+    created_at = models.DateTimeField(auto_now_add=True)
+
+    def __str__(self):
+        return f'{self.type}'
+
+
+class NutritionValue(models.Model):
+    information = models.ForeignKey(NutritionInformation, on_delete=models.CASCADE)
+    type = models.ForeignKey(NutritionType, on_delete=models.CASCADE)
+    value = models.DecimalField(max_digits=32, decimal_places=16)
+    created_by = models.ForeignKey(User, on_delete=models.CASCADE)
+    created_at = models.DateTimeField(auto_now_add=True)
+
+    def __str__(self):
+        return f'{self.value} {self.type}'