类型错误插入数据到sqlite中烧瓶

Question

我想从表单和表中插入数据到表中，但我得到这个错误。

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

错误是告诉你什么是错的，你给下面的行3个参数时，它只能接受2

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

的第一个参数应该是SQL查询，而第二个参数应该是一个将取代?占位符的值列表。但是，您不小心将book_id置于列表的外部，导致它作为第三个参数传递。它应该在列表中，如下所示：

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