SynchronizationManager.sync() throws JSON Decoding exception

[oliveira-marcio]

Hi guys, I've noticed that when we try to use the Sync API with the SyncronizationManager in the ContentfulPersistence library, the sync() method throws a JSON Decoding Error when we have a content type in the space with a Reference field that references content from another space.

The ContentfulPersistence version I'm using is 0.17.7

The exception message I'm having is

"Cannot initialize FieldType from invalid String value ResourceLink"

I did some investigation inside the library and found that this ResourceLink type is not supported by the decodable models:

public enum FieldType: String, Decodable {
    /// An array of links or symbols
    case array = "Array"

    /// A link to an Asset
    case asset = "Asset"

    /// A boolean value, true or false
    case boolean = "Boolean"

    /// A date value with optional time component
    case date = "Date"

    /// A link to an Entry
    case entry = "Entry"

    /// A numeric integer value
    case integer = "Integer"

    /// A link to an Asset or Entry
    case link = "Link"

    /// A location value, consists of latitude and longitude
    case location = "Location"

    /// A floating point number value
    case number = "Number"

    /// A JSON object value
    case object = "Object"

    /// A short text string, can be part of an array
    case symbol = "Symbol"

    /// A longer text string
    case text = "Text"

    /// An unknown kind of value
    case none = "None"

    /// The rich text field type.
    case richText = "RichText"
}

Is that the supposed behavior? I believe this kind of content could be just ignored instead of throwing exceptions and aborting the whole synchronization to persistence.

This is a sample of the response that the Sync API returns when called by the SyncronizationManager in the app with the 2 entries we have in the space where one of them contains the ResourceLink type:

{
  "sys": {
    "type": "Array"
  },
  "total": 2,
  "skip": 0,
  "limit": 100,
  "items": [
    {
      "sys": {
        "space": {
          "sys": {
            "type": "Link",
            "linkType": "Space",
            "id": "sguoqsshwt8t"
          }
        },
        "id": "resultNarrative",
        "type": "ContentType",
        "createdAt": "2023-06-30T12:16:02.678Z",
        "updatedAt": "2023-06-30T12:16:02.678Z",
        "environment": {
          "sys": {
            "id": "develop",
            "type": "Link",
            "linkType": "Environment"
          }
        },
        "revision": 1
      },
      "displayField": "key",
      "name": "ResultNarrative",
      "description": "This model acts as an access point to the result narrative content models & content found on the performance space",
      "fields": [
        {
          "id": "key",
          "name": "key",
          "type": "Symbol",
          "localized": false,
          "required": false,
          "disabled": false,
          "omitted": false
        },
        {
          "id": "resultNarrativeKit",
          "name": "Results Narrative Kit",
          "type": "ResourceLink",
          "localized": false,
          "required": true,
          "disabled": false,
          "omitted": false,
          "allowedResources": [
            {
              "type": "Contentful:Entry",
              "source": "crn:contentful:::content:spaces/lnbo4srla2av",
              "contentTypes": [
                "resultNarrativeKit"
              ]
            }
          ]
        }
      ]
    },
    {
      "sys": {
        "space": {
          "sys": {
            "type": "Link",
            "linkType": "Space",
            "id": "sguoqsshwt8t"
          }
        },
        "id": "consultationLandingScreen",
        "type": "ContentType",
        "createdAt": "2023-05-11T13:45:45.732Z",
        "updatedAt": "2023-05-11T13:45:45.732Z",
        "environment": {
          "sys": {
            "id": "develop",
            "type": "Link",
            "linkType": "Environment"
          }
        },
        "revision": 1
      },
      "displayField": "key",
      "name": "Consultation Landing Screen",
      "description": "Content model that is used for populating views on the consultation landing screen.",
      "fields": [
        {
          "id": "key",
          "name": "key",
          "type": "Symbol",
          "localized": false,
          "required": true,
          "disabled": false,
          "omitted": false
        },
        {
          "id": "description",
          "name": "description",
          "type": "Symbol",
          "localized": false,
          "required": false,
          "disabled": false,
          "omitted": false
        }
      ]
    }
  ]
}

When I remove this entry from the space, the synchronization works normally.