fix(postgrest): preserve nullability when using JSON path #2011
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…1635) The JSON path resolver (JsonPathToType) stripped `null` using Exclude<T, null> but never added it back to the resulting type. This caused `.select('col->a')` to infer a non-nullable type even when the underlying JSON column was nullable. Example: json_col: { a: string } | null .select('json_col->a') // inferred `string` instead of `string | null` This patch re-attaches `| null` when the root JSON column contains null, ensuring correct type inference for nullable JSON columns and nullable nested paths. Fixes: #1635
Added tests to verify JsonPathToType correctly returns T | null when accessing paths on nullable JSON columns. Also updated existing tests to reflect the new nullable behavior in type expectations.
`supabase` cli isn't necesseraly generally available on the machine we run the tests on. This allows to have all necessary things we need to run the tests versioned into the package.json and installable with a single command.
5 tasks
@supabase/auth-js
@supabase/functions-js
@supabase/postgrest-js
@supabase/realtime-js
@supabase/storage-js
@supabase/supabase-js
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Original Author: @dev-hari-prasad
Moved from: #1939
Description:
What changed?
Fixed the type inference for JSON path selections (
->) by adding| nullwhen the underlying JSON column can be null.Why was this change needed?
When selecting a JSON path from a nullable JSON column, the generated TypeScript types incorrectly assumed the value could never be null.
In reality, the runtime returns
nullwhen the whole column is null, so the types were unsafe.This patch brings the inferred type in line with actual behavior.
Closes/Fixes #1635