在 Backbone 中,我需要检查模型记录是否已经存在。现在,我通过 id 获取模型,并查看其“created_at”属性是否未定义。这对我来说很脆弱。有没有人有更好的建议?
var dealProgram = new WhiteDeals.Models.DealProgram({id: servant_id});
dealProgram.fetch({
success: function() {
var program = dealProgram.toJSON();
var datecheck = program.created_at
if(typeof datecheck === 'undefined'){
dealPrograms.create({
title: "",
servant_id: servant.servant_id,
servant_name: servant.name,
servant_master: servant.master
},
{
success: function () {
self.manageServants(servants);
}
}); // End of dealPrograms.create
} else if (datecheck !== undefined) {
console.log("is defined, success!")
self.manageServants(servants);
}; // End of if statement for non-existant dealPrograms
} // End of success
}); // End of dealProgram.fetch