a.html

<div>
    <md-content class="md-padding">
        <div>
            <form name="reviewsForm">
                <div layout="row">
                    <md-input-container>
                        <label for="reviewsFormCustomers">Cliente</label>
                        <md-select id="reviewsFormCustomers" ng-model="reviewsFormModel.customer" ng-change="selectedCustomer(reviewsFormModel.customer)">
                            <md-option ng-repeat="customer in customers" ng-value="customer._id">
                                {{ ::customer.name }}
                            </md-option>
                        </md-select>
                    </md-input-container>
                </div>

                <div layout="row">
                    <md-input-container ng-if="establishments">
                        <label for="reviewsFormEstablishments">Estabelecimento</label>
                        <md-select id="reviewsFormEstablishments" ng-model="reviewsFormModel.establishmentId">
                            <md-option ng-repeat="establishment in establishments" ng-value="establishment._id">
                                {{ ::establishment.name }}
                            </md-option>
                        </md-select>
                    </md-input-container>
                </div>

                <div ng-if="reviewsFormModel.establishmentId">
                    <div layout="row">
                        <md-input-container>
                            <label>Quem avaliou?</label>
                            <input ng-model="reviewsFormModel.reviewer" type="text">
                        </md-input-container>
                    </div>

                    <div layout="row">
                        <md-input-container>
                            <label for="reviewsFormRating">Qual a nota?</label>
                            <input ng-model="reviewsFormModel.rating" type="number" min="1" max="5">
                        </md-input-container>
                    </div>

                    <div layout="row">
                        <md-input-container>
                            <label for="reviewsFormSource">Qual a fonte?</label>
                            <input ng-model="reviewsFormModel.source" type="text">
                        </md-input-container>
                    </div>

                    <div layout="row">
                        <md-input-container>
                            <label>Qual a data?</label>
                            <md-datepicker ng-model="reviewsFormModel.date"></md-datepicker>
                        </md-input-container>
                    </div>

                    <div layout="row">
                        <md-input-container>
                            <label for="reviewsFormReview">Review</label>
                            <textarea ng-model="reviewsFormModel.text" rows="5" md-select-on-focus></textarea>
                        </md-input-container>
                    </div>
                </div>

                <button type="submit" class="btn btn-default" ng-click="submit()">
                    Submit
                </button>
            </form>
        </div>
    </md-content>
</div>