CODEWITHSUNDEEP
grailsgsp
elixir
elixir

Reputation: 1442

Grails: Invoking Domain method from gsp

I have the following domain class:

package com.example

class Location {
   String state

    def getStatesList(){

    def states = ['AL','AK','AZ','AR','CA','CO','CT',
         'DC','DE','FL','GA','HI','ID','IL','IN','IA',
         'KS','KY','LA','ME','MD','MA','MI','MN','MS',
         'MO','MT','NE','NV','NH','NJ','NM','NY','NC',
         'ND','OH','OK','OR','PA','RI','SC','SD','TN',
         'TX','UT','VT','VA','WA','WV','WI','WY']
    return states
   }
}

In my gsp, I am trying to display the state list in a select dropdown as such

<g:select name="location.state" class="form-control" from="${com.example.Location?.getStatesList()}" value="${itemInstance?.location?.state}" noSelection="['': '']" />

In doing so, I am receiving "missing method exception"

If I change the method with list, I no longer receive the error, but I don't want that.

from="${com.example.Location?.list()}"    // works
from="${com.example.Location?.getStatesList()}"     // does not work

Any help is greatly appreciated.

Upvotes: 0

Views: 237

Answers (3)

Emmanuel Rosa
Emmanuel Rosa

Reputation: 9885

As dmahaptro said, you can correct this issue by making getStatesList() a static method.

class Location {
   String state

   static List<String> getStatesList() {
         ['AL','AK','AZ','AR','CA','CO','CT',
         'DC','DE','FL','GA','HI','ID','IL','IN','IA',
         'KS','KY','LA','ME','MD','MA','MI','MN','MS',
         'MO','MT','NE','NV','NH','NJ','NM','NY','NC',
         'ND','OH','OK','OR','PA','RI','SC','SD','TN',
         'TX','UT','VT','VA','WA','WV','WI','WY']
   }
}

Then you'll be able to execute Location.statesList or Location.getStatesList().

Alternative

I think a cleaner alternative is using a final constant:

class Location {
   String state

   static final List<String> STATES =
         ['AL','AK','AZ','AR','CA','CO','CT',
         'DC','DE','FL','GA','HI','ID','IL','IN','IA',
         'KS','KY','LA','ME','MD','MA','MI','MN','MS',
         'MO','MT','NE','NV','NH','NJ','NM','NY','NC',
         'ND','OH','OK','OR','PA','RI','SC','SD','TN',
         'TX','UT','VT','VA','WA','WV','WI','WY']
}

Then you can access the list the same way: Location.STATES. The difference is that the all-caps name implies a value that does not change (and does not require accessing the database).

Upvotes: 1

sebnukem
sebnukem

Reputation: 8323

You have to make getStatesList() static because you are not accessing an instance of the Location class.

Upvotes: 0

Todd Sharp
Todd Sharp

Reputation: 3355

list() is a method on the domain object's metaclass. In order to do what you're trying to do you'd have to instantiate an instance of Location (or add to the metaclass). I'd personally use an Enum instead if I were you.

Upvotes: 0

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