Docusign PHP SDK - Fill Template pre-defined data label value - php

Question

UPDATE:
As it turns out, I need to enable this setting for data to show up, and using tabs is the correct thing to do.
When an envelope is sent, write the initial value of the field for all recipients
=================================================================
Not sure why this one is not mentioned in API properly ... but how does one go about filling template's custom data label with template?
So, I create a template like this:
$envelope_definition = new EnvelopeDefinition([
'status' => 'sent',
'template_id' => $args['template_id'],
]);
then I create a signer:
$signer = new TemplateRole([
'email' => $args['signer_email'],
'name' => $args['signer_name'],
'role_name' => 'signer',
]);
Here is where the disconnect happened, where do I add a pre-defined template value? I tried two things so far:
1. Add tabs to $signer like so, but by doing so, it ereases all field value in the final document,
new Tabs([
"text_tabs" => [
new Text([
"tab_label" => "price",
"value" => "123456789",
]),
],
]),
Call $envelope_definition->setCustomFields() , like this :
$envelope_definition->setCustomFields(new CustomFields([
'text_custom_fields' => [
'price' => new Text([
'tab_label' => 'price',
'custom_tab_id' => 'price',
'value' => '123456789',
]),
],
]));
It will throw me a C# error, which I don't understand at all:
Error while requesting server, received a non successful HTTP code [400] with response Body: O:8:\"stdClass\":2:{s:9:\"errorCode\";s:20:\"INVALID_REQUEST_BODY\";s:7:\"message\";s:718:\"The request body is missing or improperly formatted. Cannot deserialize the current JSON object (e.g. {\"name\":\"value\"}) into type 'System.Collections.Generic.List`1[API_REST.Models.v2_1.textCustomField]' because the type requires a JSON array (e.g. [1,2,3]) to deserialize correctly.\r\nTo fix this error either change the JSON to a JSON array (e.g. [1,2,3]) or change the deserialized type so that it is a normal .NET type (e.g. not a primitive type like integer, not a collection type like an array or List<T>) that can be deserialized from a JSON object. JsonObjectAttribute can also be added to the type to force it to deserialize from a JSON object.\r\nPath 'customFields.textCustomFields.price', line 1, position 45.\";}"
API docs seems to be focusing on creating template and values adhoc ... anyone have something that works? Thanks a lot!

Answer 1

You can find valid PHP example here which shows how to prepopulate template tab values while creating an envelope.

Answer 2

You didn't follow the example correctly.
You didn't create a \DocuSign\eSign\Model\TextCustomField object.
Here it is from Amit's link:
# Create an envelope custom field to save the our application's
# data about the envelope
$custom_field = new \DocuSign\eSign\Model\TextCustomField([
'name' => 'app metadata item',
'required' => 'false',
'show' => 'true', # Yes, include in the CoC
'value' => '1234567']);
$custom_fields = new \DocuSign\eSign\Model\CustomFields([
'text_custom_fields' => [$custom_field]]);
$envelope_definition->setCustomFields($custom_fields);