Author: mikedd
Date: Thu Apr 29 18:54:21 2010
New Revision: 939450
URL: http://svn.apache.org/viewvc?rev=939450&view=rev
Log:
Update manual on difference between nullable=false and optional=false
Modified:
openjpa/branches/1.2.x/openjpa-project/src/doc/manual/jpa_overview_mapping.xml
openjpa/branches/1.2.x/openjpa-project/src/doc/manual/jpa_overview_meta.xml
Modified:
openjpa/branches/1.2.x/openjpa-project/src/doc/manual/jpa_overview_mapping.xml
URL:
http://svn.apache.org/viewvc/openjpa/branches/1.2.x/openjpa-project/src/doc/manual/jpa_overview_mapping.xml?rev=939450&r1=939449&r2=939450&view=diff
==============================================================================
---
openjpa/branches/1.2.x/openjpa-project/src/doc/manual/jpa_overview_mapping.xml
(original)
+++
openjpa/branches/1.2.x/openjpa-project/src/doc/manual/jpa_overview_mapping.xml
Thu Apr 29 18:54:21 2010
@@ -99,6 +99,14 @@ JPA uses the defaults defined by the spe
each mapping throughout this chapter, we also describe the defaults that apply
when the mapping is absent.
</para>
+ <note>
+ <para>
+Mapping metadata is used primarily with schema generation. This metadata
should not
+be relied upon for validation prior to communicating with the database.
+For example using the @Column(nullable=false) annotation does not do up front
validation
+that the value in the entity is correct.
+ </para>
+ </note>
<section id="jpa_overview_mapping_table">
<title>
Table
Modified:
openjpa/branches/1.2.x/openjpa-project/src/doc/manual/jpa_overview_meta.xml
URL:
http://svn.apache.org/viewvc/openjpa/branches/1.2.x/openjpa-project/src/doc/manual/jpa_overview_meta.xml?rev=939450&r1=939449&r2=939450&view=diff
==============================================================================
--- openjpa/branches/1.2.x/openjpa-project/src/doc/manual/jpa_overview_meta.xml
(original)
+++ openjpa/branches/1.2.x/openjpa-project/src/doc/manual/jpa_overview_meta.xml
Thu Apr 29 18:54:21 2010
@@ -107,6 +107,15 @@ in the Reference Guide for details. Ther
these extension annotations.
</para>
</note>
+ <note>
+ <para>
+Persistence metadata may be used to validate the contents of your entities
prior to communicating
+with the database. This differs from mapping meta data which is primarily used
for schema generation.
+For example if you indicate that a relationship is not optional (e.g.
@Basic(optional=false)) OpenJPA
+will validate that the variable in your entity is not null
<emphasis>before</emphasis> inserting a row
+in the database.
+ </para>
+ </note>
<mediaobject>
<imageobject>
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