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Last updated by admin 4 years ago

The Grails console

Grails  ????Groovy ???????????????????Grails?????????????? 

grails console
???????Swing GUI??????????????????????????grails?????????????????????????

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Grails ships with an extended version of the regular Groovy console. To run the console simply type the following command from the root of a Grails project: 

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grails console

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The console is a Swing GUI interface that lets you type arbitrary commands and execute them. It is a good way to learn Grails and try out the various dynamic finders available on your domain model.
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The Grails interactive shell
?????????grails??????????shell,????????????????????????????shell?????grails ?????????

grails shell

????????????????????????????????????????????????????????"go"????????
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In addition to the console there is the interactive shell. It works similar to the console but with a text UI only. To run the shell simply type the following command from the root of a Grails project:

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grails shell

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There are instructions on how to use it when it loads, but essentially you type in the commands you want to execute separated by carriage returns and you then type go followed by a carriage return to execute the commands.
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General usage
Both console and shell are useful for working interactively with your Grails application:

    

  • find domain objects with the help of dynamic finder methods
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  • call mutator methods on domain objects once you have a reference to them
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  • save() or delete() domain objects like you would otherwise do in a controller
    • 

  • … _more to come here_
    • 

Such an interactive work can be helpful for debugging purposes, for verifying your assumptions about the object state and behavior, to test the effect of dynamic finder methods before putting the code in a controller.
Below is a transcript of an example session with a grails shell for a fictious book store application.

.... more to come here
Packaging a WAR
To package a WAR file for deployment onto an application server you can do:

grails war

By default this will package for a production environment you can change this by doing:

grails test war // for test enviroment
grails dev war  // for development environment
grails prod war // for production

If you want to package for X other environment you can do:

grails -Dgrails.env=blah war