Comment on "Validations functions"

[jeroenvandijk]

The unchanged validation function doesn't seem to allow deletion of docs. I think it should be the following instead (note the _delete check):

function (newDoc, oldDoc, userCtx) {
  function unchanged(field) {
    if (oldDoc && !newDoc._deleted && toJSON(oldDoc[field]) != toJSON(newDoc[field]))
      throw({forbidden : "Field can't be changed: " + field});
  }
  unchanged("created_at");
}

This will not allow changes to the created_at field, but does allow deletion.

[ido-ran]

You should also check the very important author field otherwise the whole point of limit only the author to be able to change the document has gone.