Question

Here is an Example of the app. The essential code is in: golang-code/handler/handler.go (After the subject should appear an ID!)

Im trying to build a little blog system in Golang on Google Appengine and use Mustache as template engine.

So, i have a struct:

type Blogposts struct {
    PostTitle   string
    PostPreview string
    Content     string
    Creator     string
    Date        time.Time
}

The data is passed to GAE via

    datastore.Put(c, datastore.NewIncompleteKey(c, "Blogposts", nil), &blogposts)

So, GAE assigns automatically a intID (int64).
Now I tried to get the latest blogposts

// Get the latest blogposts
c := appengine.NewContext(r)
q := datastore.NewQuery("Blogposts").Order("-Date").Limit(10)

var blogposts []Blogposts
_, err := q.GetAll(c, &blogposts)

Until there all things works fine, but when I try to access intID (or stringID, whatever) I dont have access to this 🙁

<h3><a href="/blog/read/{{{intID}}}">{{{PostTitle}}}</a></h3>

(PostTitle works, intID not, i’ve tried thousand of things, nothing worked 🙁 )

Anyone an idea? This would be great!

Edit:
I use mustache.

http://mustache.github.com/

In the code I use:

x["Blogposts"] = blogposts
data := mustache.RenderFile("templates/about.mustache", x)
sendData(w, data) // Equivalent to fmt.Fprintf

And then the data can be accessed in the .mustache template with {{{Content}}} or {{{PostTitle}}} etc.

Answer 1

intID is an internal property of a Key not the struct, and is accessible through a getter:

id := key.IntID()

GetAll returns []*Key, which you’re not using:

_, err := q.GetAll(c, &blogposts)

One way to get around this is to create a viewmodel struct that has both your post and key info (untested, but this is the gist of it):

  //... handler code ...

  keys, err := q.GetAll(c, &blogposts)
  if err != nil {
    http.Error(w, "Problem fetching posts.", http.StatusInternalServerError)
    return
  }

  models := make([]BlogPostVM, len(blogposts))
  for i := 0; i < len(blogposts); i++ {
    models[i].Id = keys[i].IntID()
    models[i].Title = blogposts[i].Title
    models[i].Content = blogposts[i].Content
  }

  //... render with mustache ...
}

type BlogPostVM struct {
  Id int
  Title string
  Content string
}