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Grails supports dynamic finders which makes it convenient to perform simple database queries.
But for more complex cases, Grails provides both Criteria API and HQL. It is well known that Grails sits on top of Spring and Hibernate - two of the most popular Java frameworks.
HQL is fully object oriented and understands inheritance, polymorphism and association.
Using it will provide a very powerful and flexible API yet preserving your application to be database agnostic.
Your error messages should show up in one of the Tomcat logs.
If you started Tomcat up from Net Beans, you'll see a separate Tomcat log window (tab in the Output window) with errors. If you started Tomcat up manually, you'll have to go to CATALINA_HOME/logs (I don't know if you are on Windows, Macintosh, or Linux) to view the errors. A couple of comments on your code, although I know you're just now writing test code. Verify user input outside the servlet Gather up the user input, and then use a validation class.
The easiest way to perform database queries is through dynamic finders. Check my previous post for a tutorial on this topic. It may not be suitable for complex requirements and cases where the developer needs a lower level of control.
HQL is a very good alternative as it is very similar to SQL.
Right now, I've kept it simple with plans to include some more validations, manipulations, etc. Right now, I've kept it simple with plans to include some more validations, manipulations, etc. The first thing that I see is while you are trying to connect to a My SQL database, you're using an ODBC driver.My problem is that while it does not throw any compiling or runtime error, the database does not get updated (As per the code below, database name is mobilemarketplace and the table name is vendor registration. My problem is that while it does not throw any compiling or runtime error, the database does not get updated (As per the code below, database name is mobilemarketplace and the table name is vendor registration. So unless you have an ODBC connection set up on your system, this will not work at all.