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TriumphST
TriumphST

Reputation: 1214

In Grails g:select, using an enum, display the enum keys, but use the values as the options' values

I wanted to use a g:select tag to produce a select box where the keys of the enum are displayed to the user, while the values of the enum are passed when the form is submitted, using the following enum:

public enum LetterRange {
    ABCD("a-d"),
    EFGH("e-h"),
    IJKLM("i-m"),

    final String value

    AccessLevel(String value) { this.value = value }

    String toString() { value }
    String getKey() { name() }
}

Upvotes: 0

Views: 1915

Answers (3)

Ocat
Ocat

Reputation: 1

You can use directly a closure to access your name property :

<g:select id="letterRange" name="letterRange" from="${LetterRange}" 
    noSelection="['':'Select Range...']" optionValue="${ {it.name()} }" required=""/>

Upvotes: 0

dsharew
dsharew

Reputation: 10665

I usually put my enum value on message.properties, this way I get the flexibility of adding any lang translation, also purpose you are looking.

So to do that I make my enum implement the MessageSourceResolvable class.

e.g ( source )

package com.mycompany

enum Season implements org.springframework.context.MessageSourceResolvable {
    SPRING, SUMMER, AUTUMN, WINTER

    Object[] getArguments() { [] as Object[] }

    String[] getCodes() {
        ["${getClass().name}.${name()}"] as String[]
    }

    String getDefaultMessage() { name() }
}

message.properties

com.mycompany.Season.SPRING=Spring
com.mycompany.Season.SUMMER=Summer
com.mycompany.Season.AUTUMN=Autumn
com.mycompany.Season.WINTER=Winter

Gsp

<g:select  required="${com.mycompany.Season.values}"/>

which will give you an Html like this: 

<select>
   <option value = "SPRING"> Spring </option>
   <option value = "SUMMER"> Summer </option>
   <option value = "AUTUMN"> Autumn </option>
   <option value = "WINTER"> Winer </option>
</select>

Upvotes: 0

TriumphST
TriumphST

Reputation: 1214

I used the LetterRange enum:

public enum LetterRange {
    ABCD("a-d"),
    EFGH("e-h"),
    IJKLM("i-m"),

    final String value

    AccessLevel(String value) { this.value = value }

    String toString() { value }
    String getKey() { name() }
}

...like so in the 'g:select' tag:

<g:select id="letterRange" name="letterRange" from="${LetterRange}" 
        noSelection="['':'Select Range...']" optionValue="key" required=""/>

...which produced the following HTML on the page:

<select id="batchRange" name="batchRange">
    <option value="a-d">ABCD</option>
    <option value="e-h">EFGH</option>
    <option value="i-m">IJKLM</option>
</select>

Upvotes: 1

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