sqlalchemy.exc.IntegrityError 受到打击:(IntegrityError)约束失败“INSERT INTO 用户" [英] struck at sqlalchemy.exc.IntegrityError: (IntegrityError) constraint failed 'INSERT INTO users
问题描述
我正在使用 sqlite 数据库，并且我在这个要点中声明了模型
I am using sqlite database and I declared the models as in this gist
https://gist.github.com/mmahesh/7245561
我添加了一个带有事务管理器的模型实例
I have added a model instance with transaction manager as
with transaction.manager:
model = Users(username='example',name='Example', email_primary='m@m.com', _password='example')
DBSession.add(model)
每当我执行 initialize_sample_db development.ini 时，就会出现这个错误
Whenever I execute initialize_sample_db development.ini, this error shows up
sqlalchemy.exc.IntegrityError: (IntegrityError) constraint failed 'INSERT INTO users (name, username, email_primary, email_secondary, _password, bio) VALUES (?, ?, ?, ?, ?, ?)' ('Example', 'example', 'm@m.com', None, 'example', None )
附加信息:当我使用 sqlite3 命令工具并在 '.d' 命令之后我得到
Additional Information: when i use sqlite3 command tool and after '.d' command i get
PRAGMA foreign_keys=OFF;
BEGIN TRANSACTION;
COMMIT;
提前致谢
推荐答案
在表 users 中，您已将列 id 定义为主键.但是，在您的 INSERT 语句中，您没有提供 id.
In table users you have defined column id as primary key.
However, in your INSERT statement you do not provide id.
如果 id 是自动递增列，那完全没问题 - 但事实并非如此.
That would be totally fine if id was auto-increment column - but it is not.
解决方法是添加sqlite_autoincrement=True 进入您的 users 表定义.
Solution is to add sqlite_autoincrement=True into your users table definition.
此外，您的 users 表定义似乎过于严格 - 您要求大多数字段不可为空.这取决于您的任务，但有时过于严格可能是个坏主意 - 如果您忘记(或根本不想)填写其中一个字段，也会导致违反约束.
Also, your users table definitions seems to be too strict - you require most fields to be non-nullable. It depends on your task, but sometimes being too strict can be bad idea - it will also cause constraint violation if you forgot (or simply don't want) to fill one of those fields.
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