Flask 方法不允许：请求的URL不允许使用该方法

不允许使用方法：不允许使用该方法，因为发布评论时会出现请求的URL错误。

您的@app.route“/”需要包含方法参数，并将POST作为选项。默认情况下，这不包括在内，只允许GET：

@app.route('/<int:bookid>')

def view(bookid):

    if "user" in session:
        user = session["user"]


        review = ReviewForm(request.form)

**# ...get isbn,author,username,title from database**

      if request.method == 'POST':
            review = review.data['review']
            stars = review.data['stars']
            db.execute("INSERT INTO reviews (username,review,bookid,stars)  VALUES (:u,:r,:bi,:s)",{"u":user,"r":review,"bi":bookid,"s":stars})
            db.commit()

        rev=db.execute("SELECT EXISTS(SELECT REVIEW FROM reviews WHERE reviews.bookid = :id AND reviews.username =:username )",{"id":bookid,"username":user}).fetchone()[0]

**# ...get rating from api**

        results=[]

        res=db.execute("SELECT * from reviews WHERE bookid = :id",{"id":bookid})
        results=res.fetchall()

        if len(results) != 0:
               table = Reviews(results)
               table.border = True
               return render_template("bookdetails.html",rev=rev,user=user,title=booktitle,bookisbn=bookisbn,author=bookauthor,year=bookyear,table=table,form=review)

        else:
               return render_template("bookdetails.html",rev=rev,user=user,title=booktitle,bookisbn=bookisbn,author=bookauthor,year=bookyear,table="No Reviews",form=review)


    else:
        return redirect(url_for('login'))

您的@app.route“/”需要将methods参数与POST一起作为选项。默认情况下，这不包括在内，只允许GET：

@app.route('/<int:bookid>')

def view(bookid):

    if "user" in session:
        user = session["user"]


        review = ReviewForm(request.form)

**# ...get isbn,author,username,title from database**

      if request.method == 'POST':
            review = review.data['review']
            stars = review.data['stars']
            db.execute("INSERT INTO reviews (username,review,bookid,stars)  VALUES (:u,:r,:bi,:s)",{"u":user,"r":review,"bi":bookid,"s":stars})
            db.commit()

        rev=db.execute("SELECT EXISTS(SELECT REVIEW FROM reviews WHERE reviews.bookid = :id AND reviews.username =:username )",{"id":bookid,"username":user}).fetchone()[0]

**# ...get rating from api**

        results=[]

        res=db.execute("SELECT * from reviews WHERE bookid = :id",{"id":bookid})
        results=res.fetchall()

        if len(results) != 0:
               table = Reviews(results)
               table.border = True
               return render_template("bookdetails.html",rev=rev,user=user,title=booktitle,bookisbn=bookisbn,author=bookauthor,year=bookyear,table=table,form=review)

        else:
               return render_template("bookdetails.html",rev=rev,user=user,title=booktitle,bookisbn=bookisbn,author=bookauthor,year=bookyear,table="No Reviews",form=review)


    else:
        return redirect(url_for('login'))

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你能格式化你的代码吗？你能添加更多的细节吗？你能格式化你的代码吗？你能补充更多细节吗？