fix: ensure default values are not shown when value is hidden (#13074)

Fixes #12834 

`loginAttempts` was being shown in the admin panel when it should be
hidden. The field is set to `hidden: true` therefore the value is
removed from siblingData and passes the `allowDefaultValue` check -
showing inconsistent data.

This PR ensures the default value is not returned if the field has a
value but was removed due to the field being hidden.

packages/payload/src/fields/hooks/afterRead/promise.ts

@@ -114,6 +114,7 @@ export const promise = async ({
   const pathSegments = path ? path.split('.') : []
   const schemaPathSegments = schemaPath ? schemaPath.split('.') : []
   const indexPathSegments = indexPath ? indexPath.split('-').filter(Boolean)?.map(Number) : []
+  let removedFieldValue = false
 
   if (
     fieldAffectsData(field) &&
@@ -121,6 +122,7 @@ export const promise = async ({
     typeof siblingDoc[field.name!] !== 'undefined' &&
     !showHiddenFields
   ) {
+    removedFieldValue = true
     delete siblingDoc[field.name!]
   }
 
@@ -331,7 +333,7 @@ export const promise = async ({
     // Execute access control
     let allowDefaultValue = true
     if (triggerAccessControl && field.access && field.access.read) {
-      const result = overrideAccess
+      const canReadField = overrideAccess
         ? true
         : await field.access.read({
             id: doc.id as number | string,
@@ -342,7 +344,7 @@ export const promise = async ({
             siblingData: siblingDoc,
           })
 
-      if (!result) {
+      if (!canReadField) {
         allowDefaultValue = false
         delete siblingDoc[field.name!]
       }
@@ -351,6 +353,7 @@ export const promise = async ({
     // Set defaultValue on the field for globals being returned without being first created
     // or collection documents created prior to having a default
     if (
+      !removedFieldValue &&
       allowDefaultValue &&
       typeof siblingDoc[field.name!] === 'undefined' &&
       typeof field.defaultValue !== 'undefined'

test/access-control/config.ts

@@ -484,6 +484,12 @@ export default buildConfigWithDefaults(
             type: 'checkbox',
             hidden: true,
           },
+          {
+            name: 'hiddenWithDefault',
+            type: 'text',
+            hidden: true,
+            defaultValue: 'default value',
+          },
         ],
       },
       {

test/access-control/int.spec.ts

@@ -231,6 +231,26 @@ describe('Access Control', () => {
       expect(updatedDoc.cannotMutateRequired).toBe('cannotMutateRequired')
       expect(updatedDoc.cannotMutateNotRequired).toBe('cannotMutateNotRequired')
     })
+
+    it('should not return default values for hidden fields with values', async () => {
+      const doc = await payload.create({
+        collection: hiddenFieldsSlug,
+        data: {
+          title: 'Test Title',
+        },
+        showHiddenFields: true,
+      })
+
+      expect(doc.hiddenWithDefault).toBe('default value')
+
+      const findDoc2 = await payload.findByID({
+        id: doc.id,
+        collection: hiddenFieldsSlug,
+        overrideAccess: false,
+      })
+
+      expect(findDoc2.hiddenWithDefault).toBeUndefined()
+    })
   })
   describe('Collections', () => {
     describe('restricted collection', () => {