feat: improve field ops (#3172)

Co-authored-by: PatrikKozak <patrik@trbl.design>

test/fields/collections/Text/index.ts

@@ -57,6 +57,26 @@ const TextFields: CollectionConfig = {
       type: 'text',
       maxLength: 50000,
     },
+    {
+      name: 'fieldWithDefaultValue',
+      type: 'text',
+      defaultValue: async () => {
+        const defaultValue = new Promise((resolve) => setTimeout(() => resolve('some-value'), 1000));
+
+        return defaultValue;
+      },
+    },
+    {
+      name: 'dependentOnFieldWithDefaultValue',
+      type: 'text',
+      hooks: {
+        beforeChange: [
+          ({ data }) => {
+            return data?.fieldWithDefaultValue || '';
+          },
+        ],
+      },
+    },
   ],
 };
 

test/fields/int.spec.ts

@@ -47,6 +47,15 @@ describe('Fields', () => {
       expect(doc.defaultFunction).toEqual(defaultText);
       expect(doc.defaultAsync).toEqual(defaultText);
     });
+
+    it('should populate default values in beforeValidate hook', async () => {
+      const { fieldWithDefaultValue, dependentOnFieldWithDefaultValue } = await payload.create({
+        collection: 'text-fields',
+        data: { text },
+      });
+
+      await expect(fieldWithDefaultValue).toEqual(dependentOnFieldWithDefaultValue);
+    });
   });
 
   describe('timestamps', () => {