Fix rds.toJsonObject method only supporting string values

Currently, the `toJsonObject` method from `rds` only supports `{ stringValue: string }`, but other value types can appear in payloads, such as `{ longValue: int }`.

This PR changes it so it assumes value types of any kind, as long as the value type is an object with a key and the value we want to map.

Author: skyrpex

__tests__/resolvers.test.js

@@ -242,6 +242,9 @@ describe("rds resolvers", () => {
             "numberOfRecordsUpdated": 0,
             "records": [
               [
+                {
+                  "longValue": 12345
+                },
                 {
                   "stringValue": "Mark Twain"
                 },
@@ -253,6 +256,9 @@ describe("rds resolvers", () => {
                 }
               ],
               [
+                {
+                  "longValue": 67890
+                },
                 {
                   "stringValue": "Jack London"
                 },
@@ -265,6 +271,21 @@ describe("rds resolvers", () => {
               ]
             ],
             "columnMetadata": [
+              {
+                "type": 4,
+                "typeName": "serial",
+                "label": "id",
+                "schemaName": "",
+                "tableName": "Books",
+                "isAutoIncrement": true,
+                "isSigned": true,
+                "isCurrency": false,
+                "isCaseSensitive": false,
+                "nullable": 0,
+                "precision": 10,
+                "scale": 0,
+                "arrayBaseColumnType": 0
+              },
               {
                 "isSigned": false,
                 "isCurrency": false,

rds/index.js

@@ -20,12 +20,11 @@ export function toJsonObject(inputStr) {
         }
 
         for (const colNo in record) {
-
-          // TODO: what if the column is not a string?
-          const { stringValue } = record[colNo];
           const { label } = columnMetadata[colNo];
 
-          row[label] = stringValue;
+          // We assume that the record is a simple object with a single key-value pair.
+          // For example, `{ longValue: 1 }` or `{ stringValue: "Acme Corp" }`.
+          row[label] = Object.values(record[colNo])[0];
         }
 
         statement.push(row);