Method on class [] was used outside of a Grails application controller

Question

Having below grails config: Datasource.

environments {
development {
    dataSource {
        dbCreate = "create-drop" // one of 'create', 'create-drop', 'update', 'validate', ''
        url = "jdbc:h2:mem:devDb;MVCC=TRUE;LOCK_TIMEOUT=10000;DB_CLOSE_ON_EXIT=FALSE"
    }

    datasource_staging_oracle {
        dbCreate = "none"
        url = "jdbc:oracle:thin:@//myoraclehost:1521/DBNAME"
        driverClassName = "oracle.jdbc.OracleDriver"
        username = "username"
        password = "password"
    }
}

Domain class:

import org.springframework.integration.Message

class SpringMessage {

    static mapping = {
        datasource 'staging_oracle'
        message type: 'blob', column: 'message_bytes'
        createdDate type: Date, column: 'created_date'
    }
    static constraints = {
    }

    String messageId
    Message<?> message
    Date createdDate
}

Inside the controller, fetching the records using:

SpringMessage springMessage = SpringMessage.findByMessageId('messsage_id_value')

Above line fails with below error: Method on class [com.foo.bar.SpringMessage] was used outside of a Grails application. If running in the context of a test using the mocking API or bootstrap Grails correctly.

How to resolve this? Googling shows grails "test" related posts. But this is not test code. Above findBy method is called from a grails controller. I am on grails 2.3.3 and unfortunately can not upgrade to latest grails as of now.

UPDATE
Controller code:

class FooController {
    def index() {
        foo2()
    }
    private def foo2() {
        SpringMessage springMessage = SpringMessage.findByMessageId('my_message_id') //This line blowsup
        if ( springMessage) {
            println springMessage.createdDate
        } else {
            println "not found"
        }
    }
}

I access the controller using http://localhost:8080/myapp/foo/index
UPDATE
Blob column declaration is incorrect in my original question. Correct version is below:

class SpringMessage {

    static mapping = {
        datasource 'staging_oracle'
        message type: 'blob', column: 'message_bytes'
        createdDate type: Date, column: 'created_date'
    }
    static constraints = {
    }

    String messageId
    Blob message
    Date createdDate
}

Answer 1

Issue is because of a typo in DataSource.groovy: dataSource word should have 'S' in upper case. Yikes. Grails should have warned on this.

environments {
  development {
    dataSource {
        dbCreate = "create-drop" // one of 'create', 'create-drop', 'update', 'validate', ''
        url = "jdbc:h2:mem:devDb;MVCC=TRUE;LOCK_TIMEOUT=10000;DB_CLOSE_ON_EXIT=FALSE"
    }

    dataSource_staging_oracle {
        dbCreate = "none"
        url = "jdbc:oracle:thin:@//myoraclehost:1521/DBNAME"
        driverClassName = "oracle.jdbc.OracleDriver"
        username = "username"
        password = "password"
    }
}