node.js - Make waterline accept async custom validation -

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how use async custom validation in waterline ?

i tried :

module.export = {   types: {     album : function(albumid) {       album.findone(albumid)       .then(function(album) {         console.log(album !== undefined); // true         return album != undefined;       })       .catch(function(err) {         return false;       });       // if return true there, works     },   }   attributes: {     album: {       model: 'album',       album: true     }   } }

but seems validation rejected because validation function returns before promise successed. tried returning promise doesn't work :p


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