fix: #13007, replace $ with \uFF04, like .

src/database/mongo/hash.js

@@ -174,11 +174,12 @@ module.exports = function (module) {
 		}
 
 		const data = {};
-		fields.forEach((field) => {
+		fields = fields.map((field) => {
 			field = helpers.fieldToString(field);
 			if (field) {
 				data[field] = 1;
 			}
+			return field;
 		});
 
 		const item = await module.client.collection('objects').findOne({ _key: key }, { projection: data });

src/database/mongo/helpers.js

@@ -23,7 +23,9 @@ helpers.fieldToString = function (field) {
 		field = field.toString();
 	}
 	// if there is a '.' in the field name it inserts subdocument in mongo, replace '.'s with \uff0E
-	return field.replace(/\./g, '\uff0E');
+	// replace $ with \uff04 so we can use $ in document fields
+	return field.replace(/\./g, '\uff0E')
+		.replace(/\$/g, '\uFF04');
 };
 
 helpers.serializeData = function (data) {