How to append a string on an array?

Question

Lets say I have an array field in a document:

entries: ["hello"]

I would like to append new elements to this array field i.e ["Yellow" ,"Blue"]

I did some research and most the techniques replace the entire record. How can I achieve this?

I'm using javascript.

what language are you using? do you have more sample code? more context would be useful. — matias elgart
– matias elgart, Commented Feb 9, 2018 at 4:42
what context do you need? i have an array field. how do i add elements to it without overwriting the whole field? — maxflow
– maxflow, Commented Feb 9, 2018 at 4:46

regisin · Accepted Answer · 2018-02-09 05:03:09Z

2

And looks like you are developing using firebase firestore, please take a look at their documentation here.

You'll have to retrieve the document you want to edit first, append the array, then update it.

answered Feb 9, 2018 at 5:03

regisin

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