Variable destructuring in Nunjucks template

Question

Currently variables are referred as properties inside for loop:

{% id, item in items %}
  <div>
    {{ id }}
    {{ item.foo }}
    {{ item.bar }}
    {{ item.baz }}
    ...

It is desirable to skip item. part in for:

  ...
  <div>
    {{ id }}
    {{ foo }}
    {{ bar }}
    {{ baz }}

Similarly to ES6 destructuring:

for (const [id, {foo, bar, baz}] of Object.entries(items)) ...

Is it possible to refer them as variables and not item properties in Nunjucks template?

Answer 1

Imho, it's behavior is danger. Foo and Bar can override passed to template and {% set Foo = ... %} vars.

var nunjucks  = require('nunjucks');
var env = nunjucks.configure();

env.addGlobal('destruct', function(obj) { 
    for (var key in obj)
        this.ctx[key] = obj[key];
})

var res = nunjucks.renderString(`
    {% for id, item in items %}
        {{destruct(item)}}
        {{id}} - {{foo}} - {{bar}}
    {% endfor %}
    `,
    {
        items: {
            A: {id: 10, foo: 'fooA', bar: 'barA'}, 
            B: {id: 20, foo: 'fooB', bar: 'barB'}
        }
    }
);

console.log(res);