To pass data from a controller to a view we must return a model. The model is a map with all the values we want to show on the Groovy Server Page (GSP). We can explicitly return a model from an action, but if we don't do that the controller's properties are passed as the model to the view. Remember that in Grails a new controller instance is created for each request. So it is save to use the properties of the controller as model in our views.
1 2 3 4 5 6 7 8 9 10 11 12 13 | // File: grails-app/controllers/com/mrhaki/SampleController.groovypackage com.mrhakiclass SampleController { def values = ['Grails', 'Groovy', 'Griffon', 'Gradle', 'Spock'] def greeting def index = { greeting = 'Welcome to My Blog' // Don't return a model, so the properties become the model. }} |
1 2 3 4 5 6 7 8 9 | <%-- File: grails-app/views/sample/index.gsp --%><html> <head> </head> <body> <h1>${greeting}</h1> <g:join in="${values}"/> rock! </body></html> |
