fixed: receiving error if _this. is not defined #275 (#279)

* fixed: receiving error if _this. is not defined #275

* fixed: receiving error if _this. is not defined #275

Author: loitran

dist/vue-apollo.esm.js

@@ -3921,7 +3921,12 @@ var launch = function launch() {
 
     var _loop = function _loop(key) {
       if (key.charAt(0) !== '$') {
-        if (!_this.hasOwnProperty(key) && !_this.$props.hasOwnProperty(key) && !_this.$data.hasOwnProperty(key)) {
+        var propHasKeyProperty = false;
+        if (typeof _this.$props !== 'undefined') {
+          propHasKeyProperty = _this.$props.hasOwnProperty(key);
+        }
+
+        if (!_this.hasOwnProperty(key) && !propHasKeyProperty && !_this.$data.hasOwnProperty(key)) {
           Object.defineProperty(_this, key, {
             get: function get$$1() {
               return _this.$data.$apolloData.data[key];

dist/vue-apollo.min.js

@@ -3927,7 +3927,12 @@ var launch = function launch() {
 
     var _loop = function _loop(key) {
       if (key.charAt(0) !== '$') {
-        if (!_this.hasOwnProperty(key) && !_this.$props.hasOwnProperty(key) && !_this.$data.hasOwnProperty(key)) {
+        var propHasKeyProperty = false;
+        if (typeof _this.$props !== 'undefined') {
+          propHasKeyProperty = _this.$props.hasOwnProperty(key);
+        }
+
+        if (!_this.hasOwnProperty(key) && !propHasKeyProperty && !_this.$data.hasOwnProperty(key)) {
           Object.defineProperty(_this, key, {
             get: function get$$1() {
               return _this.$data.$apolloData.data[key];

dist/vue-apollo.umd.js

@@ -40,7 +40,12 @@ const launch = function launch () {
     // watchQuery
     for (let key in apollo) {
       if (key.charAt(0) !== '$') {
-        if (!this.hasOwnProperty(key) && !this.$props.hasOwnProperty(key) && !this.$data.hasOwnProperty(key)) {
+        let propHasKeyProperty = false
+        if (typeof this.$props !== 'undefined') {
+          propHasKeyProperty = this.$props.hasOwnProperty(key)
+        }
+
+        if (!this.hasOwnProperty(key) && !propHasKeyProperty && !this.$data.hasOwnProperty(key)) {
           Object.defineProperty(this, key, {
             get: () => this.$data.$apolloData.data[key],
             enumerable: true,