Issue
when we try to fetch the assembly items via REST API, it returns a forbidden error with detail as “The assembly item record is only available as a beta record”.
Solution 1
We cannot fetch all records via REST API as some of the records are beta for REST API.
In order to fetch beta records via REST API, need to complete Oracle NetSuite Umbrella Beta Program Recruitment Form. If it is completed there will be a Enable-feature for the REST Record Service.
Beta records cannot be fetched without completing the Umbrella Beta Program.
Solution 2
We can fetch some of the beta records by creating the query using SuiteQL.
But we can only get some of the fields of assembly item record using SuiteQL which are Assembly, Bill of Materials, Can be Master Default and Master Default fields.