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Chapter 3. Posting Messages

You have used Grails scaffolding to create some skeleton pages that manage users and roles. You will now learn the basics of web application development in Grails and implement the first of our user's goals to post messages.

The first user story could go something like this. As a team member, I want to be able to send a message to the rest of my team, so that I can share important information with my teammates.

To accomplish this goal, you are going to implement the following:

A page to allow users to post messages
A home page to display all messages in a chronological order

You will need to take the following steps to implement the above items:

Create a domain class to represent messages
Create a controller to handle user actions for messages
Create a view to allow users to enter message data
Create a controller to handle requests for the home page of the application
Create a view for the home page
Validate the message data input by the user
Use GORM (Grail's Object Relational Mapping) to persist the message
Use GORM to retrieve the messages in chronological order