fix: JSON fields handling for MariaDB

server/models/renderers.js

@@ -22,12 +22,15 @@ module.exports = class Renderer extends Model {
 
       properties: {
         key: {type: 'string'},
-        isEnabled: {type: 'boolean'},
-        config: {type: 'object'}
+        isEnabled: {type: 'boolean'}
       }
     }
   }
 
+  static get jsonAttributes() {
+    return ['config']
+  }
+
   static async getRenderers() {
     return WIKI.models.renderers.query()
   }