👽 Ignore invalid GraphQL field name

Author: jysperm

schema.js

@@ -45,6 +45,15 @@ module.exports = function buildSchema({appId, appKey, masterKey}) {
       'X-LC-Id': appId,
       'X-LC-Key': `${masterKey},master`
     }
+  }).then( cloudSchemas => {
+    return _.mapValues(cloudSchemas, (schema, className) => {
+      return _.omitBy(schema, (definition, field) => {
+        if (field.startsWith('__')) {
+          console.error(`[leancloud-graphql] Ignored invalid GraphQL field name \`${className}.${field}\``);
+          return true;
+        }
+      });
+    });
   }).then( cloudSchemas => {
     const classes = _.mapValues(cloudSchemas, (schema, className) => {
       return AV.Object.extend(className);