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我有兩個表配置和設置其中一個配置的設置的部分(兒童)。休眠獲取額外的,NULL,排
我使用HibernateDaoSupport.find()來檢索配置,並且生成的對象包含3個設置,其中之一是null。不是具有空值的對象,而只是null。
根據日誌的Hibernate只發現了兩行:
DEBUG [org.hibernate.jdbc.ConnectionManager] - releasing JDBC connection [ (open PreparedStatements: 0, globally: 0) (open ResultSets: 0, globally: 0)]
DEBUG [org.hibernate.engine.TwoPhaseLoad] - resolving associations for [com.xx.Setting#1]
DEBUG [org.hibernate.engine.TwoPhaseLoad] - done materializing entity [com.xx.Setting#1]
DEBUG [org.hibernate.engine.TwoPhaseLoad] - resolving associations for [com.xx.Setting#2]
DEBUG [org.hibernate.engine.TwoPhaseLoad] - done materializing entity [com.xx.Setting#2]
DEBUG [org.hibernate.engine.loading.CollectionLoadContext] - 1 collections were found in result set for role: com.xx.Configuration.settings
DEBUG [org.hibernate.engine.loading.CollectionLoadContext] - collection fully initialized: [com.xx.Configuration.settings#1]
DEBUG [org.hibernate.engine.loading.CollectionLoadContext] - 1 collections initialized for role: com.xx.Configuration.settings
DEBUG [org.hibernate.loader.Loader] - done loading collection
然後
DEBUG [org.hibernate.pretty.Printer] - com.xx.Setting{dataType=TEXT, name=xx, id=1, value=xx}
DEBUG [org.hibernate.pretty.Printer] - com.xx.Configuration{settings=[null, com.xx.Setting#1, com.xx.Setting#2], id=1, bu=xx}
DEBUG [org.hibernate.pretty.Printer] - com.xx.Setting{dataType=TEXT, name=xx, id=2, value=xx}
正如你可以看到它發現只有2 設置但集合包含3
編輯:以下是Hibernate映射
個<hibernate-mapping>
<class name="com.xx.Configuration"
table="sf_config"
dynamic-insert="false" dynamic-update="false"
mutable="true" optimistic-lock="version"
polymorphism="implicit" select-before-update="false" lazy="false">
<id access="field" name="id">
<generator class="native"/>
</id>
<natural-id>
<property name="bu" access="field"/>
</natural-id>
<list access="field" name="settings" table="sf_setting" lazy="false" cascade="all-delete-orphan">
<key>
<column name="configId"/>
</key>
<list-index column="id"/>
<one-to-many class="com.xx.Setting"/>
</list>
<property name="recordState" access="field"/>
</class>
</hibernate-mapping>
<hibernate-mapping>
<class name="com.xx.Setting"
table="sf_setting"
dynamic-insert="false" dynamic-update="false"
mutable="true" optimistic-lock="version"
polymorphism="implicit" select-before-update="false" lazy="false">
<id access="field" name="id">
<generator class="native"/>
</id>
<property name="name" access="field"/>
<property name="value" access="field"/>
<property name="dataType" access="field"/>
</class>
</hibernate-mapping>
數據庫的實際內容是什麼?我想知道如果這可能是不正確設置連接表的結果沒有引用一個不存在的設置的外鍵約束... – Ordous
該數據庫恰好包含2行。映射看起來對我來說是正確的。 – algiogia