To add attachment uploads to Twig forms, you need to build a custom form layout with an input file control and an upload handler.

Template

Default plugin template is called form.twig and is located in the plugins/integration-dynamics/templates/twig folder. Copy the content of that file and paste it between {% form %} and {% endform %} tags so that the twig code looks like the following (for the plugin version 1.3.2 or lower):

[msdyncrm_twig]
{% form %}
{% spaceless %}
{% if form.submission and form.status %}
<div class="row">
  <div class="col-12">
    <div class="alert alert-success">

... more lines here ...

{% endspaceless %}
{% endform %}
[/msdyncrm_twig]

Or like the following for the plugin version 1.3.3 or higher:

[msdyncrm_twig]
{% form %}
{% apply spaceless %}
{% if form.submission and form.status %}
<div class="row">
  <div class="col-12">
    <div class="alert alert-success">

... more lines here ...

{% endapply %}
{% endform %}
[/msdyncrm_twig]

Alternatively, create your custom form layout (works great for small forms). In either case don’t forget to add enctype="multipart/form-data" to <form> tag so that it works with the file uploads:

<form method="post" id="form-{{ form.id }}" enctype="multipart/form-data">

Add input file controls and give them distinct names

<input type="file" name="file-1">
<input type="file" name="file-2">

It is also a good idea to add a hidden control to identify the form in case you have multiple forms on your site or even on the same page:

<input type="hidden" name="__formid" value="1234-6789">

Code handler

Add the following code to your functions.php file. This code will create an annotation record for each of the uploaded files and attach the file content to it.

add_action( 'wordpresscrm_twig_form_submit_success', function( 
            \AlexaCRM\WordpressCRM\Form\Model $model,
            \AlexaCRM\CRMToolkit\Entity $record ) {​​​​
    $files = ACRM()->request->files;
    $fields = ACRM()->request->request;
    $sdk = ACRM()->getSdk();
    if ( $fields->get( '__formid' ) !== '1234-6789' ) {​​​​
        return;
    }​​​​
    $subjectLines = [
        'file-1' => 'File name 1',
        'file-2' => 'File name 2'
    ];
    foreach ( [ 'file-1', 'file-2' ] as $field ) {​​​​
        $file = $files->get( $field );
        if ( !( $file instanceof \Symfony\Component\HttpFoundation\File\UploadedFile ) ) {​​​​
            continue;
        }​​​​
        $annotation = $sdk->entity( 'annotation' );
        $annotation->objectid = $record;
        $annotation->subject = $subjectLines[$field];
        $annotation->documentbody = base64_encode( file_get_contents( $file->getRealPath() ) );
        $annotation->mimetype = $file->getMimeType();
        $annotation->filename = $file->getClientOriginalName();
        $sdk->create( $annotation );
    }​​​​
}​​​​, 10, 2 );