diff --git a/packages/plugins/openapi/src/rest-generator.ts b/packages/plugins/openapi/src/rest-generator.ts
index 4e7c8bcb..86ed9736 100644
--- a/packages/plugins/openapi/src/rest-generator.ts
+++ b/packages/plugins/openapi/src/rest-generator.ts
@@ -868,6 +868,10 @@ export class RESTfulOpenAPIGenerator extends OpenAPIGeneratorBase {
         const required: string[] = [];
 
         for (const field of fields) {
+            if (isForeignKeyField(field) && mode !== 'read') {
+                // foreign keys are not exposed as attributes
+                continue;
+            }
             if (isRelationshipField(field)) {
                 let relType: string;
                 if (mode === 'create' || mode === 'update') {
diff --git a/packages/plugins/openapi/tests/baseline/rest-3.0.0.baseline.yaml b/packages/plugins/openapi/tests/baseline/rest-3.0.0.baseline.yaml
index adb9ded1..0ea25801 100644
--- a/packages/plugins/openapi/tests/baseline/rest-3.0.0.baseline.yaml
+++ b/packages/plugins/openapi/tests/baseline/rest-3.0.0.baseline.yaml
@@ -2791,14 +2791,10 @@ components:
                             type: string
                         attributes:
                             type: object
-                            required:
-                                - userId
                             properties:
                                 image:
                                     type: string
                                     nullable: true
-                                userId:
-                                    type: string
                         relationships:
                             type: object
                             properties:
@@ -2830,8 +2826,6 @@ components:
                                 image:
                                     type: string
                                     nullable: true
-                                userId:
-                                    type: string
                         relationships:
                             type: object
                             properties:
@@ -2974,9 +2968,6 @@ components:
                                     format: date-time
                                 title:
                                     type: string
-                                authorId:
-                                    type: string
-                                    nullable: true
                                 published:
                                     type: boolean
                                 viewCount:
@@ -3022,9 +3013,6 @@ components:
                                     format: date-time
                                 title:
                                     type: string
-                                authorId:
-                                    type: string
-                                    nullable: true
                                 published:
                                     type: boolean
                                 viewCount:
diff --git a/packages/plugins/openapi/tests/baseline/rest-3.1.0.baseline.yaml b/packages/plugins/openapi/tests/baseline/rest-3.1.0.baseline.yaml
index f69536b3..9bd34467 100644
--- a/packages/plugins/openapi/tests/baseline/rest-3.1.0.baseline.yaml
+++ b/packages/plugins/openapi/tests/baseline/rest-3.1.0.baseline.yaml
@@ -2797,15 +2797,11 @@ components:
                             type: string
                         attributes:
                             type: object
-                            required:
-                                - userId
                             properties:
                                 image:
                                     oneOf:
                                         - type: 'null'
                                         - type: string
-                                userId:
-                                    type: string
                         relationships:
                             type: object
                             properties:
@@ -2838,8 +2834,6 @@ components:
                                     oneOf:
                                         - type: 'null'
                                         - type: string
-                                userId:
-                                    type: string
                         relationships:
                             type: object
                             properties:
@@ -2984,10 +2978,6 @@ components:
                                     format: date-time
                                 title:
                                     type: string
-                                authorId:
-                                    oneOf:
-                                        - type: 'null'
-                                        - type: string
                                 published:
                                     type: boolean
                                 viewCount:
@@ -3034,10 +3024,6 @@ components:
                                     format: date-time
                                 title:
                                     type: string
-                                authorId:
-                                    oneOf:
-                                        - type: 'null'
-                                        - type: string
                                 published:
                                     type: boolean
                                 viewCount: