Sometimes we would like to have an opportunity to get data from another database in sitecore field. Since we already have
source code of TreeList field on SDN, I decided to adjust it a little bit to have such opportunity.
To allow cross db usage I had to add one parameter to the source query of TreeList field.
It's SourceDatabaseName parameter.
Here is example how to get users from security database in TreeList field.
DataSource=/sitecore/users&SourceDatabaseName=security
Here is the way it looks:
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To get rid of broken links in this field I had to MultilistCrossDbField which is intended to validate links correctly in LinkDatabase. So, don't forget to add the line below into
/App_Config/FieldTypes.config file:
<configuration>
............
<!-- Custom fields -->
<fieldtype name="tree list cross db" type="Custom.Data.Fields.MultilistCrossDbField,TreeListCrossDB"></fieldtype></configuration>
I added support for "query:" definition into this field. Now you can use either "/sitecore/content" or "query:/sitecore/content/*" as a data source for the field.
Here is
Sitecore Package for the field.
Here is
source code.