類型錯誤插入數據到sqlite中燒瓶

Question

我想從表單和表中插入數據到表中，但我得到這個錯誤。

TypeError: function takes at most 2 arguments (3 given)

db.execute("INSERT INTO chapters (chapter, book_id) VALUES (?, ?)", [request.form['chapter']], book_id)

@app.route('/newbook') 
def new_book(): 
    return render_template('newbook.html') 

@app.route('/addbook', methods=['GET', 'POST']) 
def addbook(): 
    db = get_db() 
    db.execute("INSERT INTO books (title) VALUES (?)", 
     [request.form['title']]) 
    db.commit() 

    return redirect(url_for('new_chapter')) 


@app.route('/newchapter') 
def new_chapter(): 
    return render_template('newchapter.html') 

@app.route('/addchapter', methods=['GET', 'POST']) 
def addchapter(): 
    db = get_db() 
    cur = db.execute("SELECT last_insert_rowid()") 
    book_id = cur.fetchone() 

    db.execute("INSERT INTO chapters (chapter, book_id) VALUES (?, ?)", [request.form['chapter']], book_id) 
    db.commit() 

    return redirect(url_for('new_concepts')) 

Answer 1

錯誤是告訴你什麼是錯的，你給下面的行3個參數時，它只能接受2

db.execute("INSERT INTO chapters (chapter, book_id) VALUES (?, ?)", [request.form['chapter']], book_id) 

的第一個參數應該是SQL查詢，而第二個參數應該是一個將取代?佔位符的值列表。但是，您不小心將book_id置於列表的外部，導致它作爲第三個參數傳遞。它應該在列表中，如下所示：

db.execute("INSERT INTO chapters (chapter, book_id) VALUES (?, ?)", [request.form['chapter'], book_id])