Fix import validation

packages/builder/src/components/backend/TableNavigator/ExistingTableDataImport.svelte

@@ -66,6 +66,10 @@
       label: "Users",
       value: `${FieldType.BB_REFERENCE}${FieldSubtype.USERS}`,
     },
+    {
+      label: "User",
+      value: `${FieldType.BB_REFERENCE_SINGLE}${FieldSubtype.USER}`,
+    },
   ]
 
   $: {

packages/server/src/utilities/rowProcessor/bbReferenceProcessor.ts

@@ -176,7 +176,18 @@ export async function processOutputBBReferences(
       }
 
     case FieldType.BB_REFERENCE_SINGLE:
-      const user = await cache.user.getUser(value as string)
+      if (!value) {
+        return undefined
+      }
+
+      let user
+      try {
+        user = await cache.user.getUser(value as string)
+      } catch (err: any) {
+        if (err.code !== 404) {
+          throw err
+        }
+      }
       if (!user) {
         return undefined
       }

packages/server/src/utilities/schema.ts

@@ -94,7 +94,7 @@ export function validate(rows: Rows, schema: TableSchema): ValidationResults {
       } else if (
         (columnType === FieldType.BB_REFERENCE ||
           columnType === FieldType.BB_REFERENCE_SINGLE) &&
-        !isValidBBReference(columnData, columnSubtype)
+        !isValidBBReference(columnData, columnType, columnSubtype)
       ) {
         results.schemaValidation[columnName] = false
       } else {
@@ -164,21 +164,31 @@ export function parse(rows: Rows, schema: TableSchema): Rows {
 }
 
 function isValidBBReference(
-  columnData: any,
+  data: any,
-  columnSubtype: FieldSubtype.USER | FieldSubtype.USERS
+  type: FieldType.BB_REFERENCE | FieldType.BB_REFERENCE_SINGLE,
+  subtype: FieldSubtype.USER | FieldSubtype.USERS
 ): boolean {
-  switch (columnSubtype) {
+  if (typeof data !== "string") {
+    return false
+  }
+
+  if (type === FieldType.BB_REFERENCE_SINGLE) {
+    if (!data) {
+      return true
+    }
+    const user = parseCsvExport<{ _id: string }>(data)
+    return db.isGlobalUserID(user._id)
+  }
+
+  switch (subtype) {
     case FieldSubtype.USER:
     case FieldSubtype.USERS: {
-      if (typeof columnData !== "string") {
+      const userArray = parseCsvExport<{ _id: string }[]>(data)
-        return false
-      }
-      const userArray = parseCsvExport<{ _id: string }[]>(columnData)
       if (!Array.isArray(userArray)) {
         return false
       }
 
-      if (columnSubtype === FieldSubtype.USER && userArray.length > 1) {
+      if (subtype === FieldSubtype.USER && userArray.length > 1) {
         return false
       }
 
@@ -188,6 +198,6 @@ function isValidBBReference(
       return !constainsWrongId
     }
     default:
-      throw utils.unreachable(columnSubtype)
+      throw utils.unreachable(subtype)
   }
 }