def get_categories_info():
"""Returns only basic info about the category excluding products"""
categories_info = RedisSession().session.get('categories_info')
if not categories_info:
categories_info = Category.objects().only('name', 'locale')
RedisSession().session.set('category_info', categories_info.to_json())
return categories_info
def get_category_by_name(name, limit=None, offset=0, **kwargs):
"""Returns a category by name
Optionally the products of this category by the filters specified in
**kwargs.
"""
category = RedisSession().session.get('category_{}'.format(name))
# Defining the range of products to be fetched
start = int(offset)
end = int(limit) + start if limit else limit
# If the category could not be received by name from the cache fetch it
# from the DB instead and write it to the cache. Otherwise let the value
# retrieved from the caches represent itself as a Category object
if not category:
category = Category.objects(name=name).first()
RedisSession().session.set('category_{}'.format(name),
category.to_json())
category.products = category.products[start:end]
else:
json_category = json.loads(category.decode('utf-8'))
json_category['products'] = json_category['products'][start:end]
category = Category()
category.set_fields(json_category)
# return only the range that was requested
category.products = filter_category_products(
category.products, **kwargs)
return category
def get_all_categories(searchterm='', for_sale=None, limit=None, offset=0):
"""Returns all categories in a list
Optionally filters the products of these categories
based on a searchterm and if the product is for sale.
"""
categories = RedisSession().session.get('categories')
# Defining the range of products to be fetched
start = int(offset)
end = int(limit) + start if limit else limit
# if categores could not be retrieved from cache fetch it from the DB and
# write it to cache. Otherwise let the values retrieved from the cache
# represent itself as Category objects
if not categories:
categories = Category.objects.all()
RedisSession().session.set('categories', categories.to_json())
for category in categories:
category.products = category.products[start:end]
else:
json_categories = json.loads(categories.decode('utf-8'))
categories = []
for json_category in json_categories:
category = Category()
json_category['products'] = json_category['products'][start:end]
category.set_fields(json_category)
categories.append(category)
if any((searchterm, for_sale)):
for category in categories:
category.products = filter_category_products(
category.products,
searchterm, for_sale)
else:
for category in categories:
category.products = category.products
return categories
