def test_cache_setting(self):
"""
Test that a cache is set once the nutritional instance is created
"""
nutrition_object = self.create_nutrition_plan()[0]
self.assertFalse(cache.get(cache_mapper.get_nutrition_cache_by_key(nutrition_object)))
nutrition_object.get_nutritional_values()
self.assertTrue(cache.get(cache_mapper.get_nutrition_cache_by_key(nutrition_object)))
def get_nutritional_values(self):
"""
Sums the nutritional info of all items in the plan
"""
nutritional_representation = cache.get(cache_mapper.get_nutrition_cache_by_key(self.pk))
if not nutritional_representation:
use_metric = self.user.userprofile.use_metric
unit = 'kg' if use_metric else 'lb'
result = {'total': {'energy': 0,
'protein': 0,
'carbohydrates': 0,
'carbohydrates_sugar': 0,
'fat': 0,
'fat_saturated': 0,
'fibres': 0,
'sodium': 0},
'percent': {'protein': 0,
'carbohydrates': 0,
'fat': 0},
'per_kg': {'protein': 0,
'carbohydrates': 0,
'fat': 0},
}
# Energy
for meal in self.meal_set.select_related():
values = meal.get_nutritional_values(use_metric=use_metric)
for key in result['total'].keys():
result['total'][key] += values[key]
energy = result['total']['energy']
result['total']['energy_kilojoule'] = result['total']['energy'] * Decimal(4.184)
# In percent
if energy:
for key in result['percent'].keys():
result['percent'][key] = \
result['total'][key] * ENERGY_FACTOR[key][unit] / energy * 100
# Per body weight
weight_entry = self.get_closest_weight_entry()
if weight_entry:
for key in result['per_kg'].keys():
result['per_kg'][key] = result['total'][key] / weight_entry.weight
# Only 2 decimal places, anything else doesn't make sense
for key in result.keys():
for i in result[key]:
result[key][i] = Decimal(result[key][i]).quantize(TWOPLACES)
nutritional_representation = result
cache.set(cache_mapper.get_nutrition_cache_by_key(self.pk), nutritional_representation)
return nutritional_representation
def test_nutrition_save_and_delete(self):
"""
Test that cache is deleted when a nutrition is created or deleted.
"""
nutrition_object = self.create_nutrition_plan()[0]
nutrition_object.get_nutritional_values()
self.assertTrue(cache.get(cache_mapper.get_nutrition_cache_by_key(nutrition_object)))
nutrition_object.save()
self.assertFalse(cache.get(cache_mapper.get_nutrition_cache_by_key(nutrition_object)))
nutrition_object.get_nutritional_values()
self.assertTrue(cache.get(cache_mapper.get_nutrition_cache_by_key(nutrition_object)))
nutrition_object.delete()
self.assertFalse(cache.get(cache_mapper.get_nutrition_cache_by_key(nutrition_object)))
def test_meal_item_save_delete(self):
"""
Test that the cache is deleted once a meal undergoes a save or delete operation
"""
test_object_list = self.create_nutrition_plan()
nutritional_object = test_object_list[0]
meal_item = test_object_list[2]
nutritional_object.get_nutritional_values()
self.assertTrue(cache.get(cache_mapper.get_nutrition_cache_by_key(nutritional_object)))
meal_item.save()
self.assertFalse(cache.get(cache_mapper.get_nutrition_cache_by_key(nutritional_object.pk)))
nutritional_object.get_nutritional_values()
self.assertTrue(cache.get(cache_mapper.get_nutrition_cache_by_key(nutritional_object)))
meal_item.delete()
self.assertFalse(cache.get(cache_mapper.get_nutrition_cache_by_key(meal_item)))
def reset_nutritional_values_canonical_form(sender, instance, **kwargs):
"""
Reset the nutrition values canonical form in cache
"""
cache.delete(cache_mapper.get_nutrition_cache_by_key(instance.get_owner_object().id))
