def admin():
    form = forms.PartsUpdateForm()
    if request.method == 'POST':
        choice = request.form.get('admin_choice')
    if form.validate_on_submit():
        if choice == 'add_part':
            models.Parts.create(part_name=form.part_name.data, part_desc=form.part_desc.data,
                                part_img=form.part_img.data)
            flash("Part Created! Thanks!", "success")
            return redirect(url_for('cart'))
        if choice == 'rename_part':
            to_rename = Parts.get(Parts.part_name == form.part_name.data)
            to_rename.update_instance(part_name=form.part_rename.data)
            return redirect(url_for('cart'))
        else:
            to_del = Parts.get(Parts.part_name == form.part_name.data)
            to_del.delete_instance()
            flash("Part deleted", "success")
            return redirect(url_for('cart'))

    return render_template('admin.html', form=form)