No such property: getFlatConfig when trying to access configuration - grails

Question

So have set up a couple of values in the groovy.config file which I want for my application.
Set them as follows:
environments {
development {
grails.logging.jul.usebridge = true
reslist = ['1400x1200','1200x1024','1024x800','800x600']
resdef = '1024x800'
mapregs = ['World', 'Europe', 'Asia', 'South America','Central America', 'Pacific','Africa']
mapdef = 'World'
Then I try to access them in a controller
if ( params.mapreq == null) {
mapreq = grailsApplication.config.grails.mapdef
} else {
mapreq = params.mapreq
}
It seems to work (kind a) I get something back, but looks like an object pointer in the format
groovy.util.ConfigObject#3764a904
Tried changing it to getFlatConfig
if ( params.mapreq == null) {
mapreq = grailsApplication.getFlatConfig.grails.mapdef
} else {
mapreq = params.mapreq
}
At which point I get a "No such property: getFlatConfig when trying to access configuration" instead
So any suggestions?
Also, would the same solution work for getting the lists (like the mapregs one)?

Answer 1

grailsApplication.config.grails.mapdef should be grailsApplication.config.mapdef since mapdef is at the top level of the config (within that environment block). Since there's nothing stored under grails.mapdef, the value will be a new ConfigObject. That's why config.a.b.c.d=1 works - each time you access a new level that doesn't exist, Groovy automatically creates a new ConfigObject to hold the value being set, but if you're getting and not setting, you end up with just the empty instance.
The 2nd one doesn't work because getFlatConfig should be getFlatConfig() or flatConfig. But you can't use the ConfigObject-style dots with the flat config because it's flattened. If mapdef was actually under grails you'd access it as grailsApplication.flatConfig.'grails.mapdef' or grailsApplication.flatConfig['grails.mapdef']. But like the other one it's not, so you'd use grailsApplication.flatConfig.mapdef.