Getting Started with Grails by Scott Davis, Jason Rudolph

By Scott Davis, Jason Rudolph

Grails is a Java- and Groovy-based net framework that's outfitted for pace. First-time builders are surprised at how fast you will get a page-centric MVC website up and working due to the scaffolding and conference over configuration that Grails presents. complex net builders are frequently pleasantly shocked at how effortless it really is to leverage their current Spring and Hibernate adventure. "Getting begun with Grails" brings you up to the mark in this smooth net framework. businesses as different as LinkedIn, stressed, Tropicana, and Taco Bell are all utilizing Grails. Are you prepared to start to boot?

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We’ll use the same trick here, only this time we’ll save the class to the database as well. save() } def destroy = {} } Fire up Grails and go to http://localhost:9090/racetrack/runner: Hmm, Jane didn’t make it into the database. Any thoughts on how to see what the problem is? errors } } def destroy = {} } Of course! If it worked in the test, it’ll work here as well, right? Fire up Grails once again. $ grails run-app . . Environment set to development Running Grails application.. BeanPropertyBindingResult: 7 errors Field error in object 'Runner' on field 'address': rejected value [null]; .

Notmet=A Distance of {2}? What are you trying to do, run backwards? exceeded=Cost must be less than {3} Try to save your bogus values in the web browser once again. This time, there should be no more “robot scolding” going on: 30 | GETTING STARTED WITH GRAILS -SECOND EDITION See Figure 4-2 for a full list of available validation error messages. invalid Figure 4-2: Grails Validation Error Messages Creating Custom Validations Here’s an interesting challenge. The race organizers get burned every January by people who inadvertently write in last year instead of this year.

We now have a set of web pages that display the fields in the correct order. We have validation in place that scrubs the user input so that no rogue data makes its way into the database. And we’ve even got a few interesting tests in place, both unit and integration. com/minibooks/grailsgetting-started 5 Relationships In the last chapter, you explored validation. In this chapter, we’ll shift our focus to the relationships between domain classes. We’ll establish a one-to-many (1:M) relationship between the Race and Registration classes.

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