GraphQL classConfig query alias (#6257)

* adds alias option

* added tests

spec/ParseGraphQLSchema.spec.js

@@ -564,4 +564,102 @@ describe('ParseGraphQLSchema', () => {
       ).toEqual(Object.keys(mutations2).sort());
     });
   });
+
+  describe('query alias', () => {
+    it('Should be able to define alias for find query', async () => {
+      const parseGraphQLSchema = new ParseGraphQLSchema({
+        databaseController,
+        parseGraphQLController,
+        log: defaultLogger,
+        appId,
+      });
+
+      await parseGraphQLSchema.parseGraphQLController.updateGraphQLConfig({
+        classConfigs: [
+          {
+            className: 'Data',
+            query: {
+              get: true,
+              getAlias: 'precious_data',
+              find: true,
+              findAlias: 'data_results',
+            },
+          },
+        ],
+      });
+
+      const data = new Parse.Object('Data');
+
+      await data.save();
+
+      await parseGraphQLSchema.databaseController.schemaCache.clear();
+      await parseGraphQLSchema.load();
+
+      const queries1 = parseGraphQLSchema.graphQLQueries;
+
+      expect(Object.keys(queries1)).toContain('data_results');
+      expect(Object.keys(queries1)).toContain('precious_data');
+    });
+
+    it('should fail if query alias is not a string', async () => {
+      const parseGraphQLSchema = new ParseGraphQLSchema({
+        databaseController,
+        parseGraphQLController,
+        log: defaultLogger,
+        appId,
+      });
+
+      const classConfigsBoolFindAlias = {
+        classConfigs: [
+          {
+            className: 'Data',
+            query: {
+              get: true,
+              getAlias: 'valid',
+              find: true,
+              findAlias: true,
+            },
+          },
+        ],
+      };
+
+      const classConfigsNumberGetAlias = {
+        classConfigs: [
+          {
+            className: 'Pants',
+            query: {
+              get: true,
+              getAlias: 1,
+              find: true,
+              findAlias: 'valid',
+            },
+          },
+        ],
+      };
+
+      let className;
+
+      className = classConfigsBoolFindAlias.classConfigs[0].className;
+      try {
+        await parseGraphQLSchema.parseGraphQLController.updateGraphQLConfig(
+          classConfigsBoolFindAlias
+        );
+      } catch (e) {
+        expect(e).toMatch(
+          `Invalid graphQLConfig: classConfig:${className} is invalid because "query.findAlias" must be a string`
+        );
+      }
+
+      className = classConfigsNumberGetAlias.classConfigs[0].className;
+      try {
+        await parseGraphQLSchema.parseGraphQLController.updateGraphQLConfig(
+          classConfigsNumberGetAlias
+        );
+      } catch (e) {
+        expect(e).toMatch(
+          `Invalid graphQLConfig: classConfig:${className} is invalid because "query.getAlias" must be a string`
+        );
+      }
+    });
+  });
 });

src/Controllers/ParseGraphQLController.js

@@ -266,7 +266,13 @@ class ParseGraphQLController {
       }
       if (query !== null) {
         if (isValidSimpleObject(query)) {
-          const { find = null, get = null, ...invalidKeys } = query;
+          const {
+            find = null,
+            get = null,
+            findAlias = null,
+            getAlias = null,
+            ...invalidKeys
+          } = query;
           if (Object.keys(invalidKeys).length) {
             return `"query" contains invalid keys, [${Object.keys(
               invalidKeys
@@ -275,6 +281,10 @@ class ParseGraphQLController {
             return `"query.find" must be a boolean`;
           } else if (get !== null && typeof get !== 'boolean') {
             return `"query.get" must be a boolean`;
+          } else if (findAlias !== null && typeof findAlias !== 'string') {
+            return `"query.findAlias" must be a string`;
+          } else if (getAlias !== null && typeof getAlias !== 'string') {
+            return `"query.getAlias" must be a string`;
           }
         } else {
           return `"query" must be a valid object`;
@@ -361,6 +371,8 @@ export interface ParseGraphQLClassConfig {
   query: ?{
     get: ?boolean,
     find: ?boolean,
+    findAlias: ?String,
+    getAlias: ?String,
   };
   /* The `mutation` object contains options for which class mutations are generated */
   mutation: ?{

src/GraphQL/loaders/parseClassQueries.js

@@ -52,6 +52,8 @@ const load = function(
   const {
     get: isGetEnabled = true,
     find: isFindEnabled = true,
+    getAlias: getAlias = '',
+    findAlias: findAlias = '',
   } = getParseClassQueryConfig(parseClassConfig);
 
   const {
@@ -61,8 +63,11 @@ const load = function(
   } = parseGraphQLSchema.parseClassTypes[className];
 
   if (isGetEnabled) {
-    const getGraphQLQueryName =
+    const lowerCaseClassName =
       graphQLClassName.charAt(0).toLowerCase() + graphQLClassName.slice(1);
+
+    const getGraphQLQueryName = getAlias || lowerCaseClassName;
+
     parseGraphQLSchema.addGraphQLQuery(getGraphQLQueryName, {
       description: `The ${getGraphQLQueryName} query can be used to get an object of the ${graphQLClassName} class by its id.`,
       args: {
@@ -83,9 +88,11 @@ const load = function(
   }
 
   if (isFindEnabled) {
-    const findGraphQLQueryName = pluralize(
-      graphQLClassName.charAt(0).toLowerCase() + graphQLClassName.slice(1)
-    );
+    const lowerCaseClassName =
+      graphQLClassName.charAt(0).toLowerCase() + graphQLClassName.slice(1);
+
+    const findGraphQLQueryName = findAlias || pluralize(lowerCaseClassName);
+
     parseGraphQLSchema.addGraphQLQuery(findGraphQLQueryName, {
       description: `The ${findGraphQLQueryName} query can be used to find objects of the ${graphQLClassName} class.`,
       args: classGraphQLFindArgs,