Create an array of a certain type and reuse it

I'm having trouble creating the payload for my graphql resolver. How could I rewrite this to return a completed array?

I'm stuck inside of c.OnHTML("article", func(e *colly.HTMLElement) {} and can't return the data outside of it.

type Article struct {
	Title     string `bson:"title"`
	Source    string `bson:"source"`
	Url       string `bson:"url"`
	Timestamp string `bson:"timestamp"`
}

func (r *RootResolver) News() ([]models.Article, error) {

	c := colly.NewCollector(
		colly.MaxDepth(2),
		colly.Async(),
	)

	c.Limit(&colly.LimitRule{Parallelism: 10})

	articles := []models.Article{}

	c.OnHTML("article", func(e *colly.HTMLElement) {
		articleModel := []models.Article{
			{
				Title:     e.ChildText("h3 a"),
				Source:    e.ChildText("a[data-n-tid]"),
				Timestamp: e.ChildAttr("div:last-child time", "datetime"),
				Url:       e.ChildAttr("a[href]", "href"),
			},
		}

		fmt.Println(articleModel)
	})

	c.Visit(SOMEURLHERE)
	c.Wait()

	return articles, nil
}

If you need to get full list of articles, you need to append new article into articles slice inside of your c.OnHTML function instead creating new slice.

and return articles slice end of the News() Method.

    articles = append(articles, models.Article{
		Title:     e.ChildText("h3 a"),
		Source:    e.ChildText("a[data-n-tid]"),
		Timestamp: e.ChildAttr("div:last-child time", "datetime"),
		Url:       e.ChildAttr("a[href]", "href"),
	})

In your current implementation, articles := []models.Article{} creates an empty slice of models.Article type. And inside c.OnHTML, you creating another slice of models.Article type named articleModel with and element. That two slices has no any connection. So you need to append new element to your articles slice and return it with articles.