Fix criteria when only one value is passed

index.js

@@ -116,7 +116,7 @@ function comparisonToMongo(key, value) {
             array.push(typedValue(value))
         })
         value = { }
-        value[op] = array.length == 1 ? array[0] : array
+        value[op] = array.length == 1 && op !== '$all' ? array[0] : array
     } else {
         value = typedValue(parts[3])
         if (op == '>') value = {'$gt': value}

test/query.js

@@ -152,6 +152,11 @@ describe("query-to-mongo(query) =>", function () {
             assert.ok(results)
             assert.deepEqual(results, {array: {$all: [50, 60]} })
         })
+        it("should create $all criteria with one value", function () {
+            var results = q2m("array:all=50")
+            assert.ok(results)
+            assert.deepEqual(results, {array: {$all: [50]} })
+        })
         it("should create forced string criteria", function () {
             var results = q2m("s='a,b'")
             assert.ok(results)