字段“类别"没有默认值 [英] Field 'class' doesn't have a default value

问题描述

在我们的应用中，我有一个描述人的课程(眼睛和头发的颜色，身高等).完成注册形式后，我单击提交"按钮，并引发异常:

In our app, I have a class describing a person (eye and hair colour, height, etc). Once the form of registering is fulfilled, I click in the submit button, and an exception is thrown:

Class: java.sql.SQLException
Message: Field 'class' doesn't have a default value

我为此感到头疼，因为出于明显的原因(没有保留的字眼)，没有一个类具有名为class的字段，并且在数据库中也没有名为class的列.

I am scratching my head about this, because none of the classes have a field named class, for obvious reasons (it's a reserved word), and in the database there is no column named class, neither.

知道为什么会这样吗?以及如何解决?

Any idea why this happens? And how to fix it?

我尝试过:

classThrowingExceptionInstance.class=ClassThrowingException

现在它说无法设置只读属性:类ClassThrowingException的类

And now it says Cannot set readonly property: class for class ClassThrowingException

推荐答案

似乎是MySQL错误1364-消息:字段'％s'没有默认值.

It seems that it is MySQL error 1364 - Message: Field '%s' doesn't have a default value.

检查您修改的表.是否有没有默认值的字段?如果它们未发布这些字段值，还请分析INSERT和UPDATE语句.

Check the table which you modify. Are there any fields without default values? Also analyze INSERT and UPDATE statements if they do not post these field values.

要纠正此错误，请执行以下操作:

To fix this error:

• 修改表格-为所需字段设置默认值

或

• 将具体值传递给INSERT/UPDATE语句中的这些字段.

这篇关于字段“类别"没有默认值的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！