fix(mquery): rename cache "_update" to "_updateDoc" to not conflict with the function

Author: hasezoey

lib/mquery.js

@@ -41,8 +41,8 @@ function Query(criteria, options) {
     ? utils.clone(proto._fields)
     : undefined;
 
-  this._update = proto._update
-    ? utils.clone(proto._update)
+  this._updateDoc = proto._updateDoc
+    ? utils.clone(proto._updateDoc)
     : undefined;
 
   this._path = proto._path || undefined;
@@ -130,7 +130,7 @@ Query.prototype.toConstructor = function toConstructor() {
   p.op = this.op;
   p._conditions = utils.clone(this._conditions);
   p._fields = utils.clone(this._fields);
-  p._update = utils.clone(this._update);
+  p._updateDoc = utils.clone(this._updateDoc);
   p._path = this._path;
   p._distinct = this._distinct;
   p._collection = this._collection;
@@ -1859,9 +1859,9 @@ Query.prototype.merge = function(source) {
       utils.merge(this.options, source.options);
     }
 
-    if (source._update) {
-      this._update || (this._update = {});
-      utils.mergeClone(this._update, source._update);
+    if (source._updateDoc) {
+      this._updateDoc || (this._updateDoc = {});
+      utils.mergeClone(this._updateDoc, source._updateDoc);
     }
 
     if (source._distinct) {
@@ -2747,13 +2747,13 @@ Query.prototype.selectedExclusively = function selectedExclusively() {
  */
 
 Query.prototype._mergeUpdate = function(doc) {
-  if (!this._update) this._update = {};
+  if (!this._updateDoc) this._updateDoc = {};
   if (doc instanceof Query) {
-    if (doc._update) {
-      utils.mergeClone(this._update, doc._update);
+    if (doc._updateDoc) {
+      utils.mergeClone(this._updateDoc, doc._updateDoc);
     }
   } else {
-    utils.mergeClone(this._update, doc);
+    utils.mergeClone(this._updateDoc, doc);
   }
 };
 
@@ -2787,7 +2787,7 @@ Query.prototype._fieldsForExec = function() {
  */
 
 Query.prototype._updateForExec = function() {
-  const update = utils.clone(this._update);
+  const update = utils.clone(this._updateDoc);
   const ops = utils.keys(update);
   const ret = {};