Returns undefined when finding an item in an array in VUE

Question

I have the code below that finds the item details in array which works well.

var findGroupId = medias.find(medias => medias.group_name === this.groupName)

My medias is an array variable. Then the result of console.log(findGroupId) is below:

But when I do console.log(findGroupId.group_id) the result is undefined. But when I try changing the demo here under Using ES2015 arrow function and do demo on JavaScript Demo: Array.find(), it works well. Am I missing something?

Sample array output (fetched from database): PS: trying not to use for loop to save some memory and time.

@Eddie Please see update, tried just using fixed array values, and works. but when I used the database from database, it's not working anymore. Maybe I think it's because of my array result format? — user6632933
– user6632933, Commented Jun 7, 2018 at 5:08
maybe try to "console.log(Object.keys(findGroupId))" and check if the the key is group_id without any spaces. — Crackers
– Crackers, Commented Jun 7, 2018 at 5:10
But logging findGroupId still gives you the output of your first screenshot? — Crackers
– Crackers, Commented Jun 7, 2018 at 5:14

Eddie · Accepted Answer · 2018-06-07 05:48:41Z

1

this inside the arrow function might be referring to the document and not the object. One option is to store the this.groupName on a local variable and use it on your condition.

var groupName = this.groupName;
var findGroupId = medias.find(media => media.group_name === groupName);

answered Jun 7, 2018 at 5:48

Eddie

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2 Comments

user6632933 Over a year ago

There you go. That's it. Thanks :)

Eddie Over a year ago

Happy to help :)

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