How to set hibernate-mapping to allow for Strings longer than 255 characters?
So I'm trying to learn by creating a blog-engine. I'm using Hibernate with MySQL. Here is my hibernate-mapping for the "Post" class:
<hibernate-mapping package="com.enw.blog">
<class name="Post" table="POST">
<id name="id" column="POST_ID">
<gene开发者_运维百科rator class="native"/>
</id>
<property name="title"/>
<property name="text"/>
<property name="date" type="timestamp" column="POST_DATE"/>
</class>
</hibernate-mapping>
Of course, a post could be long. By default this sets up a table with the Strings represented as VARCHAR(255)
. How do I alter this?
I'd also appreciate a pointer to the right place in the docs, I can't seem to navigate them effectively.
You can do this with either annotations
@Column(length=256)
or XML
<property name="name" type="java.lang.String">
<column name="COLUMN" length="256"/>
</property>
Another thing, you can also change the sql-type
if you want to use a specific type.
Sources :
- Hibernate forums
Related topics :
- Hibernate UserType and a defined length
length
should do the job!
<property name="title" length="1234"/>
See Chapter 5. Basic O/R Mapping: Property
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