Bug: Array fields are not supported in Supabase replication (push fails with "unknown how to handle type: object")

[len360]

Description

When using Supabase replication, documents containing array fields (e.g. string[]) cause the push process to fail with the following error:

Error: unknown how to handle type: object

This issue occurs during update (patch) and delete operations, while insert operations work correctly.

---

Steps to reproduce

1. Define a schema with an array field:

{
	"title": "hero schema",
	"version": 0,
	"primaryKey": "name",
	"type": "object",
	"properties": {
		"name": {
			"type": "string",
			"maxLength": 100
		},
		"skills": {
			"type": "array",
			items: { type: "string" }
		}
	}
}

2. Insert a document:

await collection.insert({
  name: "Foo",
  skills: ["Teaching", "Summarizing"],
});

3. Run replication

4. Delete the document:

await doc.remove();

5. Trigger replication

---

Location of the Issue

The issue appears to originate from the addDocEqualityToQuery function, where document fields are converted into query filters.

export function addDocEqualityToQuery<RxDocType>(
    jsonSchema: RxJsonSchema<RxDocumentData<RxDocType>>,
    deletedField: string,
    modifiedField: string,
    doc: WithDeleted<RxDocType>,
    query: any
) {
	// ....
	
	for (const key of Object.keys(doc)) {
        if (ignoreKeys.has(key)) {
            continue;
        }

        const v = (doc as any)[key];
        const type = typeof v;

        if (type === "string" || type === "number") {
            query = query.eq(key, v);
        } else if (type === "boolean" || v === null) {
            query = query.is(key, v);
        } else if (type === 'undefined') {
            query = query.is(key, null);
        } else {
            // Problem: arrays and JSON objects are not handled
            throw new Error(`unknown how to handle type: ${type}`)
        }
    }
    
    //...
}

[pubkey]

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