JsonRest tries to assign properties to a frozen object

[ben hockey]

in query, JsonRest tries to assign results.total to a promise. in browsers that support Object.freeze this will fail (silently). QueryResults uses delegate to allow assigning properties to a frozen promise, maybe JsonRest could do the same.

[ben hockey]

#14928 is a duplicate of this ticket.

[ben hockey]

a possible patch:

store/JsonRest.js

@@ -1 @@
-define(["../_base/xhr", "../json", "../_base/declare", "./util/QueryResults"
-], function(xhr, JSON, declare, QueryResults) {
+define(["../_base/xhr", "../json", "../_base/declare", "./util/QueryResults", "dojo/_base/lang"
+], function(xhr, JSON, declare, QueryResults, lang) {
   //  module:
   //    dojo/store/JsonRest
   //  summary:
@@ -141 +141 @@
                                query += ")";
                        }
                }
-               var results = xhr("GET", {
+               var results = lang.delegate(xhr("GET", {
                        url: this.target + (query || ""),
                        handleAs: "json",
                        headers: headers
-               });
+               }));
                results.total = results.then(function(){
                        var range = results.ioArgs.xhr.getResponseHeader("Content-Range");
                        return range && (range=range.match(/\/(.*)/)) && +range[1];

[Kris Zyp]

The return value of xhr(), in the latest trunk is a deferred and not a direct frozen promise, so this is no longer an issue.