Python Product.update_history['title']方法代码示例

# 需要导入模块: from models import Product [as 别名]
# 或者: from models.Product import update_history['title'] [as 别名]
    def crawl_listing(self, url, ctx='', **kwargs):
        res = requests.get(url, params={'Ns': 'P_sale_flag|1'})
        res.raise_for_status()
        tree = lxml.html.fromstring(res.content)

        category = Category.objects(key=kwargs.get('key')).first()
        if not category:
            print 'Category does not exist'
            common_failed.send(sender=ctx, url=url, reason='Category does not exist -> {0} .'.format(kwargs))
            return

        product_nodes = tree.cssselect('div#product-container div');
        no_discount_num = 0 # sometimes no discount product occurs between the  discount ones ordered by sale.

        for product_node in product_nodes:
            if not product_node.get('id') or 'product' not in product_node.get('id').lower():
                continue

            key = product_node.get('id')
            info_node = product_node.cssselect('div.product-text a')[0]
            price = None; listprice = None
            listprice_node = info_node.cssselect('span.product-price')
            price_node = info_node.cssselect('span.product-sale-price')
            if listprice_node:
                listprice = ''.join(listprice_node[0].xpath('.//text()')).strip()
            if price_node:
                price = ''.join(price_node[0].xpath('.//text()')).strip()

            if price is None or listprice is None:
                no_discount_num += 1
                if no_discount_num < 3:
                    continue
                return
            no_discount_num = 0

            brand = info_node.cssselect('p span.product-designer-name')[0].text
            if brand:
                brand = brand.strip()
            title = info_node.cssselect('p.product-description')[0].text.strip()
            combine_url = info_node.get('href')

            is_new = False; is_updated = False
            product = Product.objects(key=key).first()
            if not product:
                is_new = True
                product = Product(key=key)
                product.updated = False
                product.event_type = False

            if title and title != product.title:
                product.title = title
                is_updated = True
                product.update_history['title'] = datetime.utcnow()

            if brand and brand != product.brand:
                product.brand = brand
                is_updated = True

            if combine_url and combine_url != product.combine_url:
                product.combine_url = combine_url
                is_updated = True
                product.update_history['combine_url'] = datetime.utcnow()

            if price and price != product.price:
                product.price = price
                is_updated = True

            if listprice and listprice != product.listprice:
                product.listprice = listprice
                is_updated = True

            if category.cats and set(category.cats).difference(product.dept):
                product.dept = list(set(category.cats) | set(product.dept or []))
                is_updated = True

            if category.key not in product.category_key:
                product.category_key.append(category.key)
                is_updated = True

            if is_updated:
                product.list_update_time = datetime.utcnow()
            
            # To pick the product which fit our needs, such as a certain discount, brand, dept etc.
            selected = Picker(site='saksfifthavenue').pick(product)
            if not selected:
                continue

            product.hit_time = datetime.utcnow()
            product.save()
            
            # print product.brand; print product.title; print product.combine_url; print product.listprice, ' / ', product.price; print is_new; print is_updated
            # print

            common_saved.send(sender=ctx, obj_type='Product', key=product.key, url=product.combine_url, \
                is_new=is_new, is_updated=((not is_new) and is_updated) )

        # Go to the next page to keep on crawling.
        next_page = None
        page_nodes = tree.cssselect('div.pagination-container ol.pa-page-number li a')
        for page_node in page_nodes:
#.........这里部分代码省略.........