hibernate属性字符串长度问题 | hibernate属性字符串长度问题

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问题描述

$ b

 < property name =firstnametype =string > 
< column name =FIRSTNAMEnot-null =true/> 
< / property> 
 
< property name = descriptiontype =string> 
< column name =DESCRIPTION/> 
< / property>

我使用ANT脚本从映射文件生成数据库模式，并使用VARCHAR类型创建数据库字段我的问题是，我如何指定FIRSTNAME字段的最大长度是25，并且DESCRIPTION字段的最大长度是1000？我试过了

 < property name = description这个属性标记的长度属性（如下所示） type =stringlength =1000> 
< column name =DESCRIPTION/> 
< / property>

有什么想法？

谢谢。 / p>

解决方案

 < property name =descriptiontype =string> 
< column name =descriptionlength =100/> 
< / property>

您需要将其放置到列中。

I have an object mapped in hibernate like so:

<property name="firstname" type="string">
  <column name="FIRSTNAME" not-null="true" />
</property>

<property name=description" type="string">
  <column name="DESCRIPTION" />
</property>

I'm using an ANT script to generate the database schema from the mapping file and the db fields get created with type VARCHAR size 255.

My question is, how do I specify that the max length of the FIRSTNAME field is 25, and the max length of the DESCRIPTION field is 1000? I tried adding a length attribute to the property tag (as follows) but it didn't work:

<property name=description" type="string" length="1000">
  <column name="DESCRIPTION" />
</property>

Any ideas?

Thanks.

解决方案

        <property name="description" type="string">
            <column name="description" length="100" />
        </property>

you need to place it to the column.

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