Adding $nor operator support (#4768)

* adding nor to specialQuerykeys

* adding nor suport

* adding test

* CRLF

* adding postgres NOR

* adding nor validation

* adding NOR test

* adding test amd fixing NOR cases

* revert the nor logic

src/Adapters/Storage/Mongo/MongoTransform.js

@@ -247,9 +247,9 @@ function transformQueryKeyValue(className, key, value, schema) {
   case '_perishable_token':
   case '_email_verify_token': return {key, value}
   case '$or':
-    return {key: '$or', value: value.map(subQuery => transformWhere(className, subQuery, schema))};
   case '$and':
-    return {key: '$and', value: value.map(subQuery => transformWhere(className, subQuery, schema))};
+  case '$nor':
+    return {key: key, value: value.map(subQuery => transformWhere(className, subQuery, schema))};
   case 'lastUsed':
     if (valueAsDate(value)) {
       return {key: '_last_used', value: valueAsDate(value)}

src/Adapters/Storage/Postgres/PostgresStorageAdapter.js

@@ -306,7 +306,7 @@ const buildWhereClause = ({ schema, query, index }): WhereClause => {
       patterns.push(`$${index}:name = $${index + 1}`);
       values.push(fieldName, fieldValue);
       index += 2;
-    } else if (fieldName === '$or' || fieldName === '$and') {
+    } else if (['$or', '$nor', '$and'].includes(fieldName)) {
       const clauses = [];
       const clauseValues = [];
       fieldValue.forEach((subQuery) =>  {
@@ -317,8 +317,11 @@ const buildWhereClause = ({ schema, query, index }): WhereClause => {
           index += clause.values.length;
         }
       });
-      const orOrAnd = fieldName === '$or' ? ' OR ' : ' AND ';
-      patterns.push(`(${clauses.join(orOrAnd)})`);
+
+      const orOrAnd = fieldName === '$and' ? ' AND ' : ' OR ';
+      const not = fieldName === '$nor' ? ' NOT ' : '';
+
+      patterns.push(`${not}(${clauses.join(orOrAnd)})`);
       values.push(...clauseValues);
     }
 

src/Controllers/DatabaseController.js

@@ -50,7 +50,7 @@ const transformObjectACL = ({ ACL, ...result }) => {
   return result;
 }
 
-const specialQuerykeys = ['$and', '$or', '_rperm', '_wperm', '_perishable_token', '_email_verify_token', '_email_verify_token_expires_at', '_account_lockout_expires_at', '_failed_login_count'];
+const specialQuerykeys = ['$and', '$or', '$nor', '_rperm', '_wperm', '_perishable_token', '_email_verify_token', '_email_verify_token_expires_at', '_account_lockout_expires_at', '_failed_login_count'];
 
 const isSpecialQueryKey = key => {
   return specialQuerykeys.indexOf(key) >= 0;
@@ -111,6 +111,14 @@ const validateQuery = (query: any): void => {
     }
   }
 
+  if (query.$nor) {
+    if (query.$nor instanceof Array && query.$nor.length > 0) {
+      query.$nor.forEach(validateQuery);
+    } else {
+      throw new Parse.Error(Parse.Error.INVALID_QUERY, 'Bad $nor format - use an array of at least 1 value.');
+    }
+  }
+
   Object.keys(query).forEach(key => {
     if (query && query[key] && query[key].$regex) {
       if (typeof query[key].$options === 'string') {