Fixes the usage of this plugin by Grails applications that do not have a relational DB data source #5
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Eg: front-end app that only uses web services to access data
When no datasource is present in the DataSource.groovy file, a transaction manager is not created and therefore the services with a @transaction annotation fail at runtime
It is the same scenario as the one described in this stackoverflow entry: http://stackoverflow.com/questions/10296382/developing-grails-plugin-no-bean-named-transactionmanager-is-defined-in-inte
Regardless of this error, since all the DB operations performed to generate a report are read-only, a transaction is not required.
Cheers