Firebase fetching data based on a particular key value

Question

I am using firebase real time database. My data is mostly an array of records. For example:

opty = [ {"id":1,"name":"a"}, {"id":2, "name": "b"}]

I can access the entire dataset using:

https://<my project id>.firebaseio.com/opty.json

How do I fetch the record with an id of 2 here? I've tried to do the following:

https://<my project id>.firebaseio.com/opty.json?OptyId=2

but that doesn't work.

Orlandster · Accepted Answer · 2017-10-25 02:54:58Z

1

If I got you right, you want to filter your data through the rest API.

To achieve that you can use the usual filter parameters as query strings:

https://<my project id>.firebaseio.com/opty.json?orderByKey="id"&startAt=2'

Learn more here.

edited Oct 25, 2017 at 2:54

answered Oct 25, 2017 at 2:34

Orlandster

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8 Comments

Vik Over a year ago

yes you understood correct. however how does startAt will help here? id may be totally random number and does not have to be an ordered. Or take it this way: what id is actually not a number but a unique string which is used as key for each object?

Orlandster Over a year ago

what do you want to achieve? The question says you want to get the record with an id of 2.

Vik Over a year ago

my example happen to be bad i would say. How about finding the one with name = b.

Orlandster Over a year ago

just do ?orderByKey="name"&startAt=b

Orlandster Over a year ago

yeah of course you just need to make the call dynamic. replace the value ?orderByKey="name"&startAt=kfljjfsg

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