fix(plugin-multi-tenant): incorrect tenant selection with postgres

packages/plugin-multi-tenant/src/components/TenantSelector/index.tsx

@@ -42,7 +42,7 @@ export const TenantSelector = ({ viewType }: { viewType?: ViewTypes }) => {
           selectedTenantID
             ? selectedTenantID === SELECT_ALL
               ? undefined
-              : String(selectedTenantID)
+              : (selectedTenantID as string)
             : undefined
         }
       />

packages/plugin-multi-tenant/src/providers/TenantSelectionProvider/index.tsx

@@ -33,7 +33,7 @@ export const TenantSelectionProvider = async ({
     })
     tenantOptions = docs.map((doc) => ({
       label: String(doc[useAsTitle]),
-      value: String(doc.id),
+      value: doc.id,
     }))
   } catch (_) {
     // user likely does not have access
@@ -42,15 +42,17 @@ export const TenantSelectionProvider = async ({
   const cookies = await getCookies()
   let tenantCookie = cookies.get('payload-tenant')?.value
   let initialValue = undefined
-  const isValidTenantCookie =
-    (tenantOptions.length > 1 && tenantCookie === SELECT_ALL) ||
-    tenantOptions.some((option) => option.value === tenantCookie)
 
-  if (isValidTenantCookie) {
-    initialValue = tenantCookie
+  if (tenantOptions.length > 1 && tenantCookie === SELECT_ALL) {
+    initialValue = SELECT_ALL
   } else {
-    tenantCookie = undefined
-    initialValue = tenantOptions.length > 1 ? SELECT_ALL : tenantOptions[0]?.value
+    const matchingOption = tenantOptions.find((option) => String(option.value) === tenantCookie)
+    if (matchingOption) {
+      initialValue = matchingOption.value
+    } else {
+      tenantCookie = undefined
+      initialValue = tenantOptions.length > 1 ? SELECT_ALL : tenantOptions[0]?.value
+    }
   }
 
   return (

packages/plugin-multi-tenant/src/utilities/getTenantFromCookie.ts

@@ -1,4 +1,5 @@
 import { parseCookies } from 'payload'
+import { isNumber } from 'payload/shared'
 
 /**
  * A function that takes request headers and an idType and returns the current tenant ID from the cookie
@@ -13,5 +14,9 @@ export function getTenantFromCookie(
 ): null | number | string {
   const cookies = parseCookies(headers)
   const selectedTenant = cookies.get('payload-tenant') || null
-  return selectedTenant ? (idType === 'number' ? parseFloat(selectedTenant) : selectedTenant) : null
+  return selectedTenant
+    ? idType === 'number' && isNumber(selectedTenant)
+      ? parseFloat(selectedTenant)
+      : selectedTenant
+    : null
 }