Add comments and minor changes from PR feedback

awx/ui/client/features/credentials/edit-credentials.controller.js

@@ -70,6 +70,11 @@ function EditCredentialsController (models, $state, $scope, strings) {
         _key: 'inputs'
     };
 
+    /**
+     * If a credential's `credential_type` is changed while editing, the inputs associated with 
+     * the old type need to be cleared before saving the inputs associated with the new type. 
+     * Otherwise inputs are merged together making the request invalid.
+     */
     vm.form.save = data => {
         data.user = me.getSelf().id;
         credential.unset('inputs');

awx/ui/client/lib/components/input/lookup.directive.js

@@ -81,6 +81,10 @@ function AtInputLookupController (baseInputController, $q, $state, $stateParams)
     vm.search = () => {
         scope.state._touched = true;
 
+        if (scope.state._displayValue === '' && !scope.state._required) {
+            return vm.check({ isValid: true });
+        }
+
         return model.search({ [search.key]: scope.state._displayValue }, search.config)
             .then(found => {
                 if (!found) {
@@ -105,8 +109,6 @@ function AtInputLookupController (baseInputController, $q, $state, $stateParams)
             return vm.resetDebounce();
         }
 
-        scope.state._touched = true;
-
         vm.searchAfterDebounce();
     };
 }

awx/ui/client/lib/models/Base.js

@@ -11,6 +11,19 @@ function request (method, resource) {
     return this.http[method](resource);
 }
 
+/**
+ * Intended to be useful in searching and filtering results using params
+ * supported by the API.
+ *
+ * @param {object} params - An object of keys and values to to format and
+ * to the URL as a query string. Refer to the API documentation for the 
+ * resource in use for specifics.
+ * @param {object} config - Configuration specific to the UI to accommodate
+ * common use cases.
+ *
+ * @returns {Promise} - $http
+ * @yields {(Boolean|object)}
+ */
 function search (params, config) {
     let req = {
         method: 'GET',
@@ -19,19 +32,19 @@ function search (params, config) {
     };
 
     return $http(req)
-        .then(res => {
+        .then(({ data }) => {
-            if (!res.data.count) {
+            if (!data.count) {
                 return false;
             }
 
             if (config.unique) {
-                if (res.data.count !== 1) {
+                if (data.count !== 1) {
                     return false;
                 }
 
-                this.model.GET = res.data.results[0];
+                this.model.GET = data.results[0];
             } else {
-                this.model.GET = res.data;
+                this.model.GET = data;
             }
 
             return true;