Question

For some reason when I attempt to store boolean data in the Google Apps datastore, it always stores as false.

My entity definition looks like this:

type Link struct {
  Name          string    //Coloquial label for link. Set by original User.
  ...
  isOpen        bool      //Tells us whether anyone can rewrite the link. Set by original User.
  isPerminant   bool      //Tells us whether link should be saved forever.
  isFlagged     bool      //Tells us whether the content has ever been flagged inappropriate.
}

I create an object and assign values like so:

//Create Link from form data
l   := Link{
  Name:         r.FormValue("name"),
  ...
  isOpen:       r.FormValue("open")=="on",        
  isPerminant:  r.FormValue("perminant")=="on",
  isFlagged:    r.FormValue("flagged")=="on",
}

I verify the data by running the following:

//Put the Link in the datastore
lKey, err := datastore.Put(c, datastore.NewIncompleteKey(c, "Link", nil), &l)
if err != nil {
  http.Error(w, err.Error(), http.StatusInternalServerError)
  return
}

var newLink Link
if err = datastore.Get(c, lKey, &newLink); err != nil {
  http.Error(w, err.Error(), http.StatusInternalServerError)
  return
}

newLink output value: {[name] ... false false false}

Even if I hard code in a true value for one of the is[…] properties, they all still remain false! WHHHHHHYYYY???

Answer 1

Try capitalizing the I in Is:

type Link struct {
    Name        string //Coloquial label for link. Set by original User.
    IsOpen      bool   //Tells us whether anyone can rewrite the link. Set by original User.
    IsPerminant bool   //Tells us whether link should be saved forever.
    IsFlagged   bool   //Tells us whether the content has ever been flagged inappropriate.
}

.

//Create Link from form data
l := Link{
    Name:        r.FormValue("name"),
    IsOpen:      r.FormValue("open") == "on",
    IsPerminant: r.FormValue("perminant") == "on",
    IsFlagged:   r.FormValue("flagged") == "on",
}

For a field to be saved to the datastore it must be exported. I.e. begin with an uppercase letter. For more information please read the Names section of Effective Go