Fix search tests.

packages/server/src/api/routes/tests/search.spec.ts

@@ -3554,6 +3554,8 @@ if (descriptions.length) {
                   }).toContainExactly([row])
                 })
 
+                isInternal &&
+                  describe("search by _id for relations", () => {
                     it("can filter by the related _id", async () => {
                       await expectSearch({
                         query: {
@@ -3576,6 +3578,7 @@ if (descriptions.length) {
                       }).toFindNothing()
                     })
                   })
+              })
 
             !isInternal &&
               describe("search by composite key", () => {

packages/server/src/sdk/app/rows/queryUtils.ts

@@ -7,6 +7,7 @@ import {
 } from "@budibase/types"
 import { cloneDeep } from "lodash/fp"
 import sdk from "../../../sdk"
+import { isInternal } from "../tables/utils"
 
 export const removeInvalidFilters = (
   filters: SearchFilters,
@@ -69,8 +70,11 @@ export const getQueryableFields = async (
     fromTables: string[],
     opts?: { noRelationships?: boolean }
   ): Promise<string[]> => {
-    // Querying by _id is always allowed, even if it's never part of the schema
-    const result = ["_id"]
+    const result = []
+    if (isInternal({ table })) {
+      result.push("_id")
+    }
+
     for (const field of Object.keys(table.schema).filter(
       f => allowedFields.includes(f) && table.schema[f].visible !== false
     )) {
@@ -114,7 +118,8 @@ export const getQueryableFields = async (
     return result
   }
 
-  const result = []
+  // Querying by _id is always allowed, even if it's never part of the schema
+  const result = ["_id"]
 
   if (fields == null) {
     fields = Object.keys(table.schema)