add ignoreUndefined database option

Author: hariprasadiit

spec/ParseConfigKey.spec.js

@@ -85,7 +85,8 @@ describe('Config Keys', () => {
         connectTimeoutMS: 5000,
         socketTimeoutMS: 5000,
         autoSelectFamily: true,
-        autoSelectFamilyAttemptTimeout: 3000
+        autoSelectFamilyAttemptTimeout: 3000,
+        ignoreUndefined: true,
       },
     })).toBeResolved();
     expect(loggerErrorSpy.calls.all().reduce((s, call) => s += call.args[0], '')).not.toMatch(invalidKeyErrorMessage);

src/Options/Definitions.js

@@ -1117,6 +1117,11 @@ module.exports.DatabaseOptions = {
       'The MongoDB driver option to specify the amount of time, in milliseconds, spent attempting to send or receive on a socket before timing out. Specifying 0 means no timeout.',
     action: parsers.numberParser('socketTimeoutMS'),
   },
+  ignoreUndefined: {
+    env: 'PARSE_SERVER_DATABASE_IGNORE_UNDEFINED',
+    help: 'The MongoDB driver option to set whether to ignore undefined values in BSON documents.',
+    action: parsers.booleanParser,
+  },
 };
 module.exports.AuthAdapter = {
   enabled: {

src/Options/docs.js

@@ -618,6 +618,8 @@ export interface DatabaseOptions {
   autoSelectFamily: ?boolean;
   /* The MongoDB driver option to specify the amount of time in milliseconds to wait for a connection attempt to finish before trying the next address when using the autoSelectFamily option. If set to a positive integer less than 10, the value 10 is used instead. */
   autoSelectFamilyAttemptTimeout: ?number;
+  /* The MongoDB driver option to set whether to ignore undefined values in BSON documents. */
+  ignoreUndefined: ?boolean;
 }
 
 export interface AuthAdapter {