Spring Boot and Mustache – default value

In Spring Boot + Mustache template environment, if we didn’t assign a value to a {{variable}} on the Mustache’s page, the jmustache will throws the following error messages :

com.samskivert.mustache.MustacheException$Context: No method or field with name 'variable' on line xx
	at com.samskivert.mustache.Template.checkForMissing(Template.java:316) ~[jmustache-1.13.jar:na]
	at com.samskivert.mustache.Template.getValue(Template.java:224) ~[jmustache-1.13.jar:na]
	at com.samskivert.mustache.Template.getValueOrDefault(Template.java:269) ~[jmustache-1.13.jar:na]

P.S Tested with Spring Boot 1.5.2.RELEASE

Solution 1

If the variable is optional, try to wrap like this:


Solution 2

Alternatively, in Spring Boot, override the Mustache.Compiler to provide a default value globally:


package com.hostingcompass.web;

import com.samskivert.mustache.Mustache;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.autoconfigure.mustache.MustacheEnvironmentCollector;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.core.env.Environment;

public class SpringBootWebApplication {

    public static void main(String[] args) {
        SpringApplication.run(SpringBootWebApplication.class, args);

    //Override MustacheAutoConfiguration to support defaultValue("")
    public Mustache.Compiler mustacheCompiler(Mustache.TemplateLoader mustacheTemplateLoader,
                                              Environment environment) {

        MustacheEnvironmentCollector collector = new MustacheEnvironmentCollector();

		// default value
        Mustache.Compiler compiler = Mustache.compiler().defaultValue("")
        return compiler;




  1. Spring Boot Hello World Example – Mustache
  2. jmustache – Default Values

About the Author

author image
Founder of Mkyong.com, love Java and open source stuff. Follow him on Twitter, or befriend him on Facebook or Google Plus. If you like my tutorials, consider make a donation to these charities.


Leave a Reply