grails - Retrieving a list of GORM persistent properties for a domain

Question

What's the best/easiest way to get a list of the persistent properties associated with a given GORM domain object? I can get the list of all properties, but this list contains non-persistent fields such as class and constraints.

Currently I'm using this and filtering out the list of nonPersistent properties using a list I created:

    def nonPersistent = ["log", "class", "constraints", "properties", "errors", "mapping", "metaClass"]
    def newMap = [:]
    domainObject.getProperties().each { property ->
        if (!nonPersistent.contains(property.key)) {
            newMap.put property.key, property.value
        }
    }

There seems like there must be a better way of getting just the persistent properties.

Answer 1

Try this:

import org.codehaus.groovy.grails.commons.DefaultGrailsDomainClass
...
def d = new DefaultGrailsDomainClass(YourDomain.class)
d.persistentProperties

Here's a link to the Grails API for GrailsDomainClass (it's a link to an older version; I couldn't find a newer one after some quick searches). It's got a getPersistentProperties() (used in the code snippet above). You can traverse the API documentation to see what other methods might be useful to you.

If you want an example, do a grails install-templates and then look at src/templates/scaffolding/create.gsp. There's a block in there where it iterates over the persistent domain properties.