Grails Basic

• create domain classes with grails create-domain-class command
• specify constraints on domain classes using standard validators (e.g. blank, email, size)
• write code to validate domain objects and use the errors property to get validation errors
• write code to execute basic CRUD operations (save(), get(), list() and delete())
• define transient properties in domain classes
• define relationships using belongsTo and hasMany properties
• define collection types using hasMany property

Not covered: embedded objects, DB mapping customization, domain objects testing, advanced GORM

• use grails create-controller command to create a controller
• understand how Grails picks a default action in a controller
• using params object, write code to retrieve request parameters
• for the following scopes: request, flash, session and servletContext write code to pass attributes in a Grails application
• use actions to trigger view rendering with model data
• redirect a request from one action to another
• understand data binding

Not covered: command objects, multipart request handling, interceptors, controller testing

• write simple GSP pages that use the correct syntax (prefer GSP expressions to Groovy scriptlets)
• write GSP code using predefined variables: application, flash, out, params, request, response, session
• Use built-in Grails tags:
  • variables setting: g:set
  • logic: g:if, g:elseif, g:else
  • iteration: g:each, g:while, g:collect, g:findAll
  • linking: g:link, g:createLink, g:resource
  • forms: g:form, g:textField, g:textArea, g:passwordField, g:checkBox, ** ** g:radio, g:select, g:submitButton
  • error handling: g:hasErrors, g:renderErrors
  • pagination: g:paginate

Not covered: dynamic tags, GSP templates, custom tags

• understand the concept of scaffolding
• explain the difference between dynamic scaffolding and static scaffolding

• generate project structure using grails create-app command
• run an application in the quick iterative development mode using grails run-app command
• use grails war command to create a WAR file
• understand the difference between grails war and grails run-war commands
• run unit and integration tests using grails test-app command