Prerequisite for this guide, you must install the package DAM for Sitecore JSS-11.1.zip
The connector comes with a fieldserializer for each of the 3 custom field types: asset, assetlink and assetlist. The config can be found in the file App_Config\Include\damforsitecore\DFS.JSS.Digizuite.config.
<?xml version="1.0" encoding="utf-8" ?>
<configuration xmlns:patch="http://www.sitecore.net/xmlconfig/" xmlns:role="http://www.sitecore.net/xmlconfig/role/" xmlns:search="http://www.sitecore.net/xmlconfig/search/">
<sitecore>
<pipelines>
<group groupName="layoutService">
<pipelines>
<getFieldSerializer performanceCritical="true">
<processor patch:before="processor[@type='Sitecore.LayoutService.Serialization.Pipelines.GetFieldSerializer.GetDefaultFieldSerializer, Sitecore.LayoutService']" type="DFS.JSS.Serializers.GetAssetFieldSerializer, DFS.JSS" resolve="true">
<FieldTypes hint="list">
<fieldType id="1">Asset</fieldType>
</FieldTypes>
</processor>
<processor patch:before="processor[@type='Sitecore.LayoutService.Serialization.Pipelines.GetFieldSerializer.GetDefaultFieldSerializer, Sitecore.LayoutService']" type="DFS.JSS.Serializers.GetAssetLinkFieldSerializer, DFS.JSS" resolve="true">
<FieldTypes hint="list">
<fieldType id="1">Assetlink</fieldType>
</FieldTypes>
</processor>
<processor patch:before="processor[@type='Sitecore.LayoutService.Serialization.Pipelines.GetFieldSerializer.GetDefaultFieldSerializer, Sitecore.LayoutService']" type="DFS.JSS.Serializers.GetAssetListFieldSerializer, DFS.JSS" resolve="true">
<FieldTypes hint="list">
<fieldType id="1">Assetlist</fieldType>
</FieldTypes>
</processor>
</getFieldSerializer>
</pipelines>
</group>
</pipelines>
</sitecore>
</configuration>
Usisng the Sitecore Layout Services /sitecore/api/layout/render/[config]?item=[path]&sc_lang=[language]&sc_apikey=[key]. The json output for each of the 3 fieldserializers can configured. The configuration can be found in the file App_Config\Include\damforsitecore\DFS.Settings.config. The default config looks like this:
<DFS.JSS.FieldSerializer>
<property outputName="assetTypeId" propertyName="AssetTypeId" />
<property outputName="title" propertyName="Name" />
<quality outputName="src" />
<quality outputName="src_download" download="true" />
</DFS.JSS.FieldSerializer>
This is an eaxample of the out for the fieldtype asset:
"DFS Medie": {
"value": {
"assetTypeId": 4,
"title": "Butterfly",
"src": "/dfsmedia/baeefe6b74df44be8a2bccfb2c57af8e/114-50036/butterfly",
"src_download": "/dfsmedia/baeefe6b74df44be8a2bccfb2c57af8e/114-50036/options/download/butterfly"
}
}