get form data from '[object Object]'

Question

I am passing uploaded file and dataObject in FormData:

let data = new FormData();
data.append("file", this.state.files);
data.append("data", formData);

formData is just a Json Object eg: formData = { "a":123 }

Passing data to the node server using put request with axios ,I am able to get the file object and data in req, but in data field it's giving '[object Object]'

Don't know how to access this. I tried JSON.parse(req.body.data), but getting error

SyntaxError: Unexpected token o in JSON at position 1

try using JSON.stringify(data) before sending it to the server — Silvio Biasiol
– Silvio Biasiol, Commented Feb 19, 2019 at 15:46
there's not enough context here, but it sounds like you've passed an actual JS object, which natively stringifies to that unhelpful [object Object]. You probably want to call JSON.stringify on it before you send it — Robin Zigmond
– Robin Zigmond, Commented Feb 19, 2019 at 15:47
what is formData object? You probably need to do JSON.stringify(formData) — Andrey
– Andrey, Commented Feb 19, 2019 at 15:47

Daniel Sokolowski · Accepted Answer · 2019-02-19 20:59:06Z

12

Looks like formData is an object that's cast to string [object Object] prior to being sent on the wire. Try data.append("data", JSON.stringify(formData)).

edited Feb 19, 2019 at 20:59

answered Feb 19, 2019 at 15:48

Daniel Sokolowski

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1 Comment

Seblor Over a year ago

Don't you mean JSON.stringify(formData) ? Or did I miss something.

IYE · Accepted Answer · 2019-02-19 17:34:07Z

0

Send the object with JSON.stringify and then use JSON.parse once you receive data, to make the string object an object again.

answered Feb 19, 2019 at 17:34

IYE

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