CODEWITHSUNDEEP
javascriptunderscore.js
Joe
Joe

Reputation: 4254

Using underscore to find matching property in a array with objects

I have this:

var members: [
{
   id:1,
   user:{
     name: 'John Smith',
     email:'[email protected]'
   }
},
{
   id:2,
   user:{
     name: 'Jane Smith',
     email:'[email protected]'
   }
}]

I need the member object with email as the criteria.

I tried:

_.findWhere(members, {user.email: '[email protected]'})

No luck.

Upvotes: 1

Views: 1675

Answers (1)

lossleader
lossleader

Reputation: 13505

Because you are not looking for a simple attribute AFAIK you can't use findWhere. Instead you can either use indexBy to get a rearranged collection (good for many similar lookups) or find with a test function (good for occasional lookups):

// http://jsfiddle.net/tshpfz0x/3/
var members = [{
   id: 1,
   user: {
       name: 'John Smith',
       email: '[email protected]'
   }
}, {
   id: 2,
   user: {
       name: 'Jane Smith',
       email: '[email protected]'
   }
}];

console.info(_.findWhere(members, {
    user: {
        email: '[email protected]'
    }
})); // undefined

function byEmail(member) {return member.user.email;}

console.info(
   _.indexBy(members, byEmail)["[email protected]"]
); // Object

console.info(
   _.find(members, function (member) {
       return (byEmail(member) === "[email protected]");})
); // Object

Upvotes: 2

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