fix: relation constraints in compound queries Parse.Query.or, Parse.Query.and not working (#8203)

spec/ParseRelation.spec.js

@@ -410,6 +410,49 @@ describe('Parse.Relation testing', () => {
     });
   });
 
+  it('or queries with base constraint on relation field', async () => {
+    const ChildObject = Parse.Object.extend('ChildObject');
+    const childObjects = [];
+    for (let i = 0; i < 10; i++) {
+      childObjects.push(new ChildObject({ x: i }));
+    }
+    await Parse.Object.saveAll(childObjects);
+    const ParentObject = Parse.Object.extend('ParentObject');
+    const parent = new ParentObject();
+    parent.set('x', 4);
+    const relation = parent.relation('toChilds');
+    relation.add(childObjects[0]);
+    relation.add(childObjects[1]);
+    relation.add(childObjects[2]);
+
+    const parent2 = new ParentObject();
+    parent2.set('x', 3);
+    const relation2 = parent2.relation('toChilds');
+    relation2.add(childObjects[0]);
+    relation2.add(childObjects[1]);
+    relation2.add(childObjects[2]);
+
+    const parents = [];
+    parents.push(parent);
+    parents.push(parent2);
+    parents.push(new ParentObject());
+
+    await Parse.Object.saveAll(parents);
+    const query1 = new Parse.Query(ParentObject);
+    query1.equalTo('x', 4);
+    const query2 = new Parse.Query(ParentObject);
+    query2.equalTo('x', 3);
+
+    const query = Parse.Query.or(query1, query2);
+    query.equalTo('toChilds', childObjects[2]);
+
+    const list = await query.find();
+    const objectIds = list.map(item => item.id);
+    expect(objectIds.indexOf(parent.id)).not.toBe(-1);
+    expect(objectIds.indexOf(parent2.id)).not.toBe(-1);
+    equal(list.length, 2, 'There should be 2 results');
+  });
+
   it('Get query on relation using un-fetched parent object', done => {
     // Setup data model
     const Wheel = Parse.Object.extend('Wheel');

src/Controllers/DatabaseController.js

@@ -929,32 +929,32 @@ class DatabaseController {
   reduceInRelation(className: string, query: any, schema: any): Promise<any> {
     // Search for an in-relation or equal-to-relation
     // Make it sequential for now, not sure of paralleization side effects
+    const promises = [];
     if (query['$or']) {
       const ors = query['$or'];
-      return Promise.all(
+      promises.push(
-        ors.map((aQuery, index) => {
+        ...ors.map((aQuery, index) => {
           return this.reduceInRelation(className, aQuery, schema).then(aQuery => {
             query['$or'][index] = aQuery;
           });
         })
-      ).then(() => {
+      );
-        return Promise.resolve(query);
-      });
     }
     if (query['$and']) {
       const ands = query['$and'];
-      return Promise.all(
+      promises.push(
-        ands.map((aQuery, index) => {
+        ...ands.map((aQuery, index) => {
           return this.reduceInRelation(className, aQuery, schema).then(aQuery => {
             query['$and'][index] = aQuery;
           });
         })
-      ).then(() => {
+      );
-        return Promise.resolve(query);
-      });
     }
 
-    const promises = Object.keys(query).map(key => {
+    const otherKeys = Object.keys(query).map(key => {
+      if (key === '$and' || key === '$or') {
+        return;
+      }
       const t = schema.getExpectedType(className, key);
       if (!t || t.type !== 'Relation') {
         return Promise.resolve(query);
@@ -1016,7 +1016,7 @@ class DatabaseController {
       });
     });
 
-    return Promise.all(promises).then(() => {
+    return Promise.all([...promises, ...otherKeys]).then(() => {
       return Promise.resolve(query);
     });
   }