diff --git a/.changeset/add-isnonnull-true.md b/.changeset/add-isnonnull-true.md
new file mode 100644
index 00000000000..5a2319cfb1a
--- /dev/null
+++ b/.changeset/add-isnonnull-true.md
@@ -0,0 +1,5 @@
+---
+'@keystone-6/core': major
+---
+
+Add support for [field].graphql.isNonNull: true
diff --git a/packages/core/src/fields/non-null-graphql.ts b/packages/core/src/fields/non-null-graphql.ts
index 7886569c836..8e89d6aa3eb 100644
--- a/packages/core/src/fields/non-null-graphql.ts
+++ b/packages/core/src/fields/non-null-graphql.ts
@@ -25,7 +25,7 @@ export function makeValidateHook <ListTypeInfo extends BaseListTypeInfo> (
       isNullable?: boolean
     }
     graphql?: {
-      isNonNull?: {
+      isNonNull?: boolean | {
         read?: boolean
       }
     }
@@ -75,7 +75,7 @@ export function assertReadIsNonNullAllowed<ListTypeInfo extends BaseListTypeInfo
   meta: FieldData,
   config: {
     graphql?: {
-      isNonNull?: {
+      isNonNull?: boolean | {
         read?: boolean
       }
     }
@@ -83,7 +83,8 @@ export function assertReadIsNonNullAllowed<ListTypeInfo extends BaseListTypeInfo
   dbNullable: boolean
 ) {
   if (!dbNullable) return
-  if (!config.graphql?.isNonNull?.read) return
+  if (!config.graphql?.isNonNull) return
+  if (typeof config.graphql?.isNonNull === 'object' && !config.graphql.isNonNull.read) return
 
   throw new Error(
     `${meta.listKey}.${meta.fieldKey} sets graphql.isNonNull.read: true, but not validation.isRequired: true (or db.isNullable: false)\n` +
diff --git a/packages/core/src/lib/core/initialise-lists.ts b/packages/core/src/lib/core/initialise-lists.ts
index cf22a1e09f0..4552790c287 100644
--- a/packages/core/src/lib/core/initialise-lists.ts
+++ b/packages/core/src/lib/core/initialise-lists.ts
@@ -700,9 +700,9 @@ function getListsWithInitialisedFields (
           cacheHint: f.graphql?.cacheHint,
           isEnabled: isEnabledField,
           isNonNull: {
-            read: f.graphql?.isNonNull?.read ?? false,
-            create: f.graphql?.isNonNull?.create ?? false,
-            update: f.graphql?.isNonNull?.update ?? false,
+            read: typeof f.graphql?.isNonNull === 'boolean' ? f.graphql.isNonNull : f.graphql?.isNonNull?.read ?? false,
+            create: typeof f.graphql?.isNonNull === 'boolean' ? f.graphql.isNonNull : f.graphql?.isNonNull?.create ?? false,
+            update: typeof f.graphql?.isNonNull === 'boolean' ? f.graphql.isNonNull : f.graphql?.isNonNull?.update ?? false,
           },
         },
         ui: {
diff --git a/packages/core/src/lib/typescript-schema-printer.ts b/packages/core/src/lib/typescript-schema-printer.ts
index a99836d66b4..5897704108d 100644
--- a/packages/core/src/lib/typescript-schema-printer.ts
+++ b/packages/core/src/lib/typescript-schema-printer.ts
@@ -58,7 +58,7 @@ function printInterimType<L extends InitialisedList> (
   const prismaType = `import('${prismaClientPath}').Prisma.${name}`
   return [
     `type Resolved${name} = {`,
-    ...Object.entries(list.fields).map(([fieldKey, { dbField }]) => {
+    ...Object.entries(list.fields).map(([fieldKey, { dbField, graphql }]) => {
       if (dbField.kind === 'none') return `  ${fieldKey}?: undefined`
 
       // TODO: this could be elsewhere, maybe id-field.ts
@@ -78,18 +78,14 @@ function printInterimType<L extends InitialisedList> (
         return [
           `  ${fieldKey}: {`,
           ...Object.entries(dbField.fields).map(([subFieldKey, subDbField]) => {
-            // TODO: untrue if a db defaultValue is set
-            //              const optional = operation === 'Create' && subDbField.mode === 'required' ? '' : '?'
-            const optional = '?'
+            const optional = operation === 'create' && subDbField.mode === 'required' && !subDbField.default ? '' : '?'
             return `  ${subFieldKey}${optional}: ${prismaType}['${fieldKey}_${subFieldKey}']`
           }),
           `  }`,
         ].join('\n')
       }
 
-      // TODO: untrue if a db defaultValue is set
-      //        const optional = operation === 'Create' && dbField.mode === 'required' ? '' : '?'
-      const optional = '?'
+      const optional = (operation === 'create' && dbField.mode === 'required' && !dbField.default) || graphql.isNonNull[operation] ? '' : '?'
       return `  ${fieldKey}${optional}: ${prismaType}['${fieldKey}']`
     }),
     `}`,
diff --git a/packages/core/src/types/config/fields.ts b/packages/core/src/types/config/fields.ts
index bc0b8c6d2c3..e668e1bc60f 100644
--- a/packages/core/src/types/config/fields.ts
+++ b/packages/core/src/types/config/fields.ts
@@ -37,25 +37,27 @@ export type CommonFieldConfig<ListTypeInfo extends BaseListTypeInfo> = {
   }
   graphql?: {
     cacheHint?: CacheHint
-    isNonNull?: {
-      // should this field be non-nullable on the {List} GraphQL type?
-      read?: boolean
-      // should this field be non-nullable on the {List}CreateInput GraphQL type?
-      create?: boolean
-      // should this field be non-nullable on the {List}UpdateInput GraphQL type?
-      update?: boolean
-    }
+    isNonNull?:
+      | boolean
+      | {
+        // whether this field is non-nullable on the {List} GraphQL type
+        read?: boolean
+        // whether this field is non-nullable on the {List}CreateInput GraphQL type
+        create?: boolean
+        // whether this field is non-nullable on the {List}UpdateInput GraphQL type
+        update?: boolean
+      }
 
     omit?:
       | boolean
       | {
-          // should this field be omitted from the {List} GraphQL type?
-          read?: boolean
-          // should this field be omitted from the {List}CreateInput GraphQL type?
-          create?: boolean
-          // should this field be omitted from the {List}UpdateInput GraphQL type?
-          update?: boolean
-        }
+        // whether this field is omitted from the {List} GraphQL type
+        read?: boolean
+        // whether this field is omitted from the {List}CreateInput GraphQL type
+        create?: boolean
+        // whether this field is omitted from the {List}UpdateInput GraphQL type
+        update?: boolean
+      }
   }
   isFilterable?: MaybeFieldFunction<ListTypeInfo>
   isOrderable?: MaybeFieldFunction<ListTypeInfo>