Object References

Object references are specific to Haml syntax. They are not supported by Slim or EGO templates.

An object reference is a special object in Go that can provide either id and/or class attributes to an element.

@haml ArticleCard(article Article) {
	%div[article]
		%h1.article-title= article.Title
		%p= article.Content
}

In this example we used the article value as an object reference to the div element. Here is how this might render out:

<div id="article-123" class="article">
  <h1 class="article-title">The Title</h1>
  <p>The content of the article</p>
</div>

The article value we used in the example has implemented the following two methods:

func (a Article) ObjectID() string {
  return fmt.Sprintf("article-%d", a.ID)
}

func (a Article) ObjectClass() string {
  return "article"
}

Anything that implements func ObjectID() string can be used to provide an id attribute to an element. Likewise, anything that implements func ObjectClass() string can be used to provide a class attribute to an element.

We can also provide a prefix that will be used for both the class and id attributes.

@haml ArticleCard(article Article) {
	%div[article, "stunning"]
		%h1.article-title= article.Title
		%p= article.Content
}

renders as:

<div id="stunning_article-123" class="stunning_article">
  <h1 class="article-title">The Title</h1>
  <p>The content of the article</p>
</div>