text: export const CloudinaryCollections = [];
  
  export const addCustomFields = collection => {
  
    CloudinaryCollections.push(collection);
  
    collection.addField([
      {
        fieldName: 'cloudinaryId',
        fieldSchema: {
          type: String,
          optional: true,
          canRead: ['guests'],
        }
      },
      {
        fieldName: 'cloudinaryUrls',
        fieldSchema: {
          type: Array,
          optional: true,
          canRead: ['guests'],
        }
      },
      {
        fieldName: 'cloudinaryUrls.$',
        fieldSchema: {
          type: Object,
          blackbox: true,
          optional: true
        }
      },
  
      // GraphQL only
      {
        fieldName: 'cloudinaryUrl',
        fieldSchema: {
          type: String,
          optional: true,
          canRead: ['guests'],
          resolveAs: {
            type: 'String',
            arguments: 'format: String',
            resolver: (document, {format}, context) => {
              const image = format ? _.findWhere(document.cloudinaryUrls, {name: format}) : document.cloudinaryUrls[0]
              return image && image.url;
            }
          },
        }
      },
  
    ]);
    
  }