我试图从 book_title 检索 title 属性，但我得到了<built-in method title of str object at 0x7fb554f9f238>。我已将 book_title 作为参数传递给路由簿，并在 booktitle.html 中分配了 book_title 的相应值
这是我的路线
@app.route('/search/<title>/',methods=['GET','POST'])
def btitle(title):
book_title = db.execute("SELECT title,author,isbn from books WHERE (title LIKE :title)",params={"title":title}).fetchall()
if request.method == 'GET':
book_title = db.execute("SELECT title,author,isbn from books WHERE (title LIKE :title)",params={"title":title}).fetchall()
if book_title:
return render_template("booktitle.html",book_title=book_title)
else:
return render_template("error.html")
else:
book_title = db.execute("SELECT title,author,isbn from books WHERE (title LIKE :title)",params={"title":title}).fetchall()
if book_title:
return redirect(url_for("book",book_title=book_title))
@app.route('/books/<book_title>/',methods=['GET','POST'])
def book(book_title):
if request.method == 'GET':
return render_template("individualbook.html",book_title=book_title)
而且，这些是用于 …
在我的Signedup路线中，我试图将用户 ID 存储在会话中并自动登录用户，但是当我尝试这样做时，我收到此错误：
TypeError: object of type 'ResultProxy' does not support indexing
而且，在我的signin路线中，我试图记住哪个用户已登录，但在这里出现错误：
TypeError: object of type 'ResultProxy' has no len()
signedup 路线 application.py
@app.route("/signedup",methods=["GET","POST"])
def signedup():
if request.method=="POST":
password = request.form.get("password")
hash = pwd_context.encrypt(password)
name = request.form.get("name")
if not name:
return "must provide username"
elif not password:
return "must provide password"
registration = db.execute("INSERT INTO users (username,password) VALUES (:username,:password)",
{"username":name,"password":hash})
if not registration:
return "pick a different username"
# Store their ID in session and …我目前正在学习有关STL中的地图的信息。我想知道如何从地图上获取特定的键值对。例如，下面地图中的第三个键值对。'C'-> 1
'A'-> 1
'B'-> 1
'C'-> 1
'D'-> 1
'E'-> 2