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[英]Error when working with flask sqlalchemy.exc.IntegrityError: (sqlite3.IntegrityError) UNIQUE constraint failed
[英]Error when entering data into database in flask (sqlite3.IntegrityError)
嘗試制作一個基本的測驗應用程序,當嘗試將數據插入數據庫時,它給了我錯誤
sqlalchemy.exc.IntegrityError: (sqlite3.IntegrityError) NOT NULL constraint failed: results.id
[SQL: INSERT INTO results (correct, incorrect) VALUES (?, ?)]
[parameters: (0, 1)]
所以它正在識別我試圖輸入的數據,它看起來是正確的格式,但我不明白這個錯誤,因為這部分代碼沒有提到 id(我在我的項目中的其他地方做了類似的事情並且它起作用了美好的)
class Results(db.Model):
id = db.Column(db.Integer, primary_key=True, autoincrement=True)
correct = db.Column(db.Integer, primary_key=False)
incorrect = db.Column(db.Integer, primary_key=False)
def __repr__(self):
return 'Result ' + str(self.id)
@app.route('/answers', methods=['GET', 'POST'])
def answers():
correct = Results.correct
incorrect = Results.incorrect
if request.method == 'POST':
submitted_answer = request.form['answer']
if submitted_answer == Question.option1:
correct = int(0)
incorrect = int(0)
correct += int(1)
new_result = Results(correct=correct, incorrect=incorrect)
db.session.add(new_result)
db.session.commit()
else:
correct = int(0)
incorrect = 0
incorrect += int(1)
new_result = Results(correct=correct, incorrect=incorrect)
db.session.add(new_result)
db.session.commit()
return redirect('/answers')
all_questions = Question.query.order_by().all()
all_results = Results.query.order_by().all()
return render_template('answers.html', questions=all_questions, all_results=all_results)
這是有問題的代碼,對不起,如果目睹它很痛苦,我是新手並且不完全確定所有的最佳實踐,謝謝
完整的應用程序鏈接如下
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