Why doesn't my Zapier Integration Dynamic Field work? - zapier

Question

I have a simple zapier integration built and it works perfectly. However, I'm adding dynamic fields. Again it all seems to work perfectly when I test the zap. My dynamic form fields appear just as I expected.
The problem is sending the value of those dynamic forms to my API. I am using the zapier console and when I configure the API request I am using the following:
Where body['custom_fields'] is supposed to send all my dynamic fields or even all of the fields. But when it hits my API custom_fields parameter is blank.
const options = {
url: 'https://example_url/endpoint',
method: 'POST',
headers: {
'Content-Type': 'application/json',
'Accept': 'application/json',
'Authorization': `Bearer ${bundle.authData.auth_token}`
},
body: {
'email': bundle.inputData.email,
'custom_fields': bundle.inputData
/**
I've tried the following with no luck:
'custom_fields': bundle.inputData.fields
'custom_fields': bundle.inputData.undefined
'custom_fields': bundle.inputData
*/
}
}
return z.request(options)
.then((response) => {
response.throwForStatus();
const results = response.json;
// You can do any parsing you need for results here before returning them
return results;
});

Answer 1

Ok after a few days, it's the simplest answer.
Obviously an object can't be sent over params.
so instead of having
'custom_fields': bundle.inputData
I just add the whole object to the params and it takes care of all keys and values
params: bundle.inputData
Here is the full body
const options = {
url: 'https://apiendpoint.com',
method: 'POST',
headers: {
'Authorization': `Bearer ${bundle.authData.auth_token}`
},
params: bundle.inputData,
}
return z.request(options)
.then((response) => {
response.throwForStatus();
const results = response.json;
// You can do any parsing you need for results here before returning them
return results;
});

Answer 2

You can use the spread operator ...bundle.inputData like explained in the doc:
https://platform.zapier.com/docs/input-designer#how-to-include-dynamic-fields-in-api-calls
const options = {
url: 'https://example_url/endpoint',
method: 'POST',
headers: {
'Content-Type': 'application/json',
'Accept': 'application/json',
'Authorization': `Bearer ${bundle.authData.auth_token}`
},
body: { ...bundle.inputData }
}
You can even namespace your request data like that:
body: {
request: { ...bundle.inputData }
}
NB : the spread operator raises a syntax error in Zapier code editor, but it works.