下面是网上的一个入库sqlite3的，我要原样改成入库mysql的。
功能就是插入文章，在插入文章前需要得到文章分类的id,如果有就根据分类名查询到分类id, 如果没有就根据得到的资料生成分类并取得id.
下面sqlite3的是可以的
问题是 我要改成mysql 的就不行了。具体看后面代码。
class BookspiderPipeline(object):
def __init__(self):
DBpath = os.getcwd() + '/db.sqlite3'
self.con = sqlite3.connect(DBpath)
self.cur = self.con.cursor()
def process_item(self, item, spider):
self.cur.execute("SELECT id FROM books_tag WHERE tagname = ?", (item['categoryName'],))
tagID = self.cur.fetchone()
if not tagID:
self.cur.execute("INSERT INTO books_tag (tagname) VALUES (?)", (item['categoryName'],))
self.con.commit()
self.cur.execute("SELECT id FROM books_tag WHERE tagname = ?", (item['categoryName'],))
tagID = self.cur.fetchone()
tagID = tagID[0]
print(tagID)
self.cur.execute("SELECT id FROM books_book WHERE title = ?", (item['bookName'],))
bookID = self.cur.fetchone()
if not bookID:
self.cur.execute('''
INSERT INTO books_book (title, cover, author, intro, tag_id) VALUES (?,?,?,?,?)
''', (item['bookName'], item['cover'], item['author'], item['intro'], tagID))
self.con.commit()
self.cur.execute("SELECT id FROM books_book WHERE title = ?", (item['bookName'],))
bookID = self.cur.fetchone()
bookID = bookID[0]
print(bookID)
self.cur.execute('''INSERT INTO books_chapter (number, title, content, book_id)
VALUES (?,?,?,?)''', (int(item['number']), item['chapterName'], item['chapterContent'], bookID))
self.con.commit()
return item
我的代码：
class ScMySqlPipeline(object):
def __init__(self):
dbargs = dict(
host = '127.0.0.1',
user = 'root',
passwd = 'mysqlpasswd',
db = 'info2222',
port = 3306,
cp_reconnect = True,
cursorclass = pymysql.cursors.DictCursor,
charset = 'utf8mb4',
use_unicode = True,
)
self.dbpool = adbapi.ConnectionPool('pymysql', **dbargs)
def process_item(self, item, spider):
#代码执行到这里就出问题了。应该下面代码不对。
#下面是 先判断有没有这个分类，根据分类名查询数据库，如果有就把这个分类的id取出来赋值给category_id 以便于在后面插入文章时用到这个分类id, 如果没有的话就插入这个分类然后再得到她的分类id值
conn.execute("""select id from aainfo_category where name = %s""", (item['fenlei'], ))
category_id = conn.fetchone()
if not category_id:
conn.execute("INSERT INTO aainfo_category (`name`, `slug`, `chaodai`, `num`, `description`, `jianjie`, `weburl`) VALUES (%s, %s, %s, %s, %s, %s, %s)", (item['category_name'], item['category_slug'], item['category_chaodai'], 0, item['category_description'], item['category_jianjie'], item['category_weburl']))
#conn.commit()
conn.execute("""select id from aainfo_category where name = %s""", (item['fenlei'], ))
category_id = conn.fetchone()
print (category_id)
category_id = category_id[0]
print (category_id)
if isinstance(item, vodItem):
query = self.dbpool.runInteraction(self.insert_into_info, item).addErrback(self.handle_error)
return item
self.insert_into_info 这个函数是文章插入mysql的代码。需要用到分类的id ,所以上面代码取得分类的id的功能。不知那里有错？请各位朋友指点一下。谢谢。
