Angular select directive with initial selection and track by

angular-select.html

<!-- This is an example for initiating the selection in a dropdown to a saved setting
In this case, we're using mongo to store a collection of programs and another to store a collection of projects
The projects reference the ObjectId of a program at `project.program`  -->

<select
  ng-init="selectedProgram.program = { _id: project.program }"
  ng-change="project.program = selectedProgram.program._id"
  ng-model="selectedProgram.program"
  ng-options="program.name for program in programs track by program._id">
    <!-- To have a default selection if there is no match to a program _id, just set an option with an empty value -->
    <option value="">&ndash; Select a program &ndash;</option>
</select>

I made a handy little AngularJS directive for handling dropdowns in a sane way: https://github.com/codeshrew/angular-sane-dropdown