java.sql.SQLException: 字段 'supplier_id' 没有默认值

Question

I got an error message from this：

 java.sql.SQLException: Field 'supplier_id' doesn't have a default value
    at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:946)
    at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:2985)
    at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1631)
    at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1723)
    at com.mysql.jdbc.Connection.execSQL(Connection.java:3277)
    at com.mysql.jdbc.Statement.executeUpdate(Statement.java:1402)
    at com.mysql.jdbc.Statement.executeUpdate(Statement.java:1317)

Everyone can help me ? my database fields are not empty . but i want to get this results:

insert into xxx(name,password)values('xxx','xxx'); and insert into xxx(name,password,man)values('xxx','xxx','xxx'); both success (both of that in client is success ,but in java code is error,error code at top title), instead of insert into xxx(name,password)values('xxx','xxx') is false; my mysql jar is mysql-connector-java-5.0.8

Answer 1

The error is self explanatory. Your column supplier_id does not have a default value. So during insertion, mysql cannot figure out what to insert in the column supplier_id . You can do either of the three things :-
1. Add a default value to the column supplier_id Using -

ALTER TABLE `xxx` ALTER `supplier_id` SET DEFAULT NULL

2. Supply some value to the supplier_id column during insertion.
3. Add an auto increment to the column and add a primary key to it using the code :-

ALTER TABLE `xxx` CHANGE `supplier_id` `supplier_id` INT(10)AUTO_INCREMENT PRIMARY KEY;

Answer 2

要解决此问题，请在INSERT时为supplier_id ID 提供一个值，或者使该列在数据库中可以为nullable 。

Answer 3

I added this property

<property name="hbm2ddl.auto">create</property>

into hibernate.cfg.xml file, and it worked for me.

Answer 4

There might be two cases.

1. You have declared the column's default value as NONE and are not not passing any value to it while inserting.

2. You have declared the column in database, but you have not declared the same in your entity object, which is causing the error.

Answer 5

You are using table where you have supplier_id column . it does not have default value ,at insertion time this column not getting any value . initialize supplier_id column with some default value , or use auto increment if you are using supplier_id as a primary key.

Answer 6

In my case, the problem was that the primary key column was not set as AUTO_INCREMENT

Here's how I solved it:

alter table library modify column Id int NOT NULL AUTO_INCREMENT;