Redirects, Metadata, And Errors

Redirect after changes

Use controller redirects from actions:

func (c *PostsController) Create(
    _ http.ResponseWriter,
    _ *http.Request,
) error {
    post := c.posts.Create()
    return c.RedirectTo("/posts/"+post.Param, http.StatusSeeOther)
}

RedirectTo writes the redirect response and skips automatic rendering.

Redirect back safely

Use RedirectBackOrTo when a form should return to the referring page:

return c.RedirectBackOrTo("/posts", http.StatusSeeOther)

GoLazy only uses same-host referrers. External referrers fall back to the path you provide.

Set status and headers

Response metadata can be set before rendering:

c.Status(http.StatusCreated)
c.Header().Set("Cache-Control", "no-store")
c.Set("post", post)
return nil

Status does not commit the response early, so the normal template render can still run.

Return expected errors

Wrap expected failures with an HTTP status:

if !ok {
    return lazycontroller.Error(
        http.StatusNotFound,
        fmt.Errorf("post %q not found", postID),
    )
}

The framework error handler uses the status code and can render an error template or static error page when one is available.