Queryable property in xml

Question

Hi,
<table name="dcs_prd_media" type="auxiliary" id-column-name="product_id">
<property name="template" xml-combine="remove"/>
<property name="template_en" item-type="media" column-name="template_id"
queryable="true" category-resource="categoryPresentation"
display-name-resource="template">
<attribute name="propertySortPriority" value="-5"/>
<attribute name="locale" value="en"/>
</property>
</table>
what does queryable="true" and readable="true" wats the difference between them..
Thanks in Advance
Regards
Kumaresh Babu A

Answer 1

When you have readable="true" for an item property then you can invoke getPropertyValue() for that property on the corresponding RepositoryItem objects and you will get the property value. In case readable="false" and you try invoking getPropertyValue() it will throw runtime exception. Similar logic is valid for the writable attribute with respect to setPropertyValue() method.
Now queryable signifies whether the property (and hence the underlying column in the item's database table) can be queried using RQL (which eventually would translate to SQL). So if you have a property with readable as false but queryable as true then you can't access its value using getPropertyValue() but you can execute RQL against it. Also considering the case of transient properties then they are always going to be not queryable since no column will be there but can be readable/writable so that you can read/write their values through getPropertyValue() and setPropertyValue().
Hope it helps.