add logging.debug for BooksSpider

src/spiders/books_spider.py

-import scrapy
+from scrapy import Spider
 import re
 from items.BookItem import BookItem
 from database.connectors.BookConnector import BookConnector
-import logging
 
 
-class BooksSpider(BookConnector, scrapy.Spider):
+class BooksSpider(Spider, BookConnector):
     name = 'books'
     start_urls = ['http://books.toscrape.com/']
+    page = 1
 
     def parse(self, response):
+        self.logger.debug('Current page: {}'.format(self.page))
+
         # follow links to book pages
-        for idx, href in enumerate(response.css('div.image_container a::attr(href)')): # TODO delete enumerate
-                yield response.follow(href, self.parse_book)
+        for idx, href in enumerate(response.css('div.image_container a::attr(href)')):  # TODO delete enumerate
+            yield response.follow(href, self.parse_book, meta={'idx': idx})
 
         # pagination
         next_page = response.css('li.next a::attr(href)').get()
         if next_page is not None:
+            self.page += 1
             yield response.follow(next_page, callback=self.parse)
 
     def parse_book(self, response):
+        self.logger.debug('Index book in page: {}'.format(response.meta.get('idx')))
+
         book = BookItem()
 
         table_data = response.css('table td::text').getall()
@@ -50,4 +55,4 @@ class BooksSpider(BookConnector, scrapy.Spider):
         if 'Four' in class_all:
             return 4
         if 'Five' in class_all:
-            return 5
+            return 5
\ No newline at end of file