feat: Add support for dot notation on array fields of Parse Object (#9115)

src/Adapters/Storage/Postgres/PostgresStorageAdapter.js

@@ -175,6 +175,8 @@ const toPostgresSchema = schema => {
   return schema;
 };
 
+const isArrayIndex = (arrayIndex) => Array.from(arrayIndex).every(c => c >= '0' && c <= '9');
+
 const handleDotFields = object => {
   Object.keys(object).forEach(fieldName => {
     if (fieldName.indexOf('.') > -1) {
@@ -207,7 +209,11 @@ const transformDotFieldToComponents = fieldName => {
     if (index === 0) {
       return `"${cmpt}"`;
     }
-    return `'${cmpt}'`;
+    if (isArrayIndex(cmpt)) {
+      return Number(cmpt);
+    } else {
+      return `'${cmpt}'`;
+    }
   });
 };
 

src/Controllers/DatabaseController.js

@@ -1851,6 +1851,14 @@ class DatabaseController {
         // only valid ops that produce an actionable result
         // the op may have happened on a keypath
         this._expandResultOnKeyPath(response, key, result);
+        // Revert array to object conversion on dot notation for arrays (e.g. "field.0.key")
+        if (key.includes('.')) {
+          const [field, index] = key.split('.');
+          const isArrayIndex = Array.from(index).every(c => c >= '0' && c <= '9');
+          if (isArrayIndex && Array.isArray(result[field]) && !Array.isArray(response[field])) {
+            response[field] = result[field];
+          }
+        }
       }
     });
     return Promise.resolve(response);

src/Controllers/SchemaController.js

@@ -1096,9 +1096,17 @@ export default class SchemaController {
     maintenance?: boolean
   ) {
     if (fieldName.indexOf('.') > 0) {
-      // subdocument key (x.y) => ok if x is of type 'object'
-      fieldName = fieldName.split('.')[0];
-      type = 'Object';
+      // "<array>.<index>" for Nested Arrays
+      // "<embedded document>.<field>" for Nested Objects
+      // JSON Arrays are treated as Nested Objects
+      const [x, y] = fieldName.split('.');
+      fieldName = x;
+      const isArrayIndex = Array.from(y).every(c => c >= '0' && c <= '9');
+      if (isArrayIndex && !['sentPerUTCOffset', 'failedPerUTCOffset'].includes(fieldName)) {
+        type = 'Array';
+      } else {
+        type = 'Object';
+      }
     }
     let fieldNameToValidate = `${fieldName}`;
     if (maintenance && fieldNameToValidate.charAt(0) === '_') {