From 69abefbab382a5189c340412ee0b3d2345a4a521 Mon Sep 17 00:00:00 2001
From: Matthieu Hochlander <matthieu@marmelab.com>
Date: Mon, 9 Jun 2025 18:10:14 +0200
Subject: [PATCH 1/2] Fix infinite rerenders for a disabled boolean input.

---
 packages/ra-core/src/form/useApplyInputDefaultValues.ts | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/packages/ra-core/src/form/useApplyInputDefaultValues.ts b/packages/ra-core/src/form/useApplyInputDefaultValues.ts
index 4ad17d6ee2b..1857964f42d 100644
--- a/packages/ra-core/src/form/useApplyInputDefaultValues.ts
+++ b/packages/ra-core/src/form/useApplyInputDefaultValues.ts
@@ -32,7 +32,7 @@ export const useApplyInputDefaultValues = ({
     isArrayInput,
     fieldArrayInputControl,
 }: Props) => {
-    const { defaultValue, source } = inputProps;
+    const { defaultValue, source, disabled } = inputProps;
     const finalSource = useWrappedSource(source);
 
     const record = useRecordContext(inputProps);
@@ -46,6 +46,9 @@ export const useApplyInputDefaultValues = ({
         if (
             defaultValue == null ||
             formValue != null ||
+            // When the input is disabled, its value may always be undefined, no matter the default value.
+            // This prevents from trying to reset the value indefinitely.
+            disabled ||
             // We check strictly for undefined to avoid setting default value
             // when the field is null
             recordValue !== undefined ||

From 91c5a836b75c2616377c866a12d460c4261cfdd8 Mon Sep 17 00:00:00 2001
From: Matthieu Hochlander <matthieu@marmelab.com>
Date: Tue, 10 Jun 2025 11:17:12 +0200
Subject: [PATCH 2/2] Improve Disabled story to test default value when boolean
 input is disabled.

---
 .../src/input/BooleanInput.stories.tsx        | 27 +++++++++++++++++--
 1 file changed, 25 insertions(+), 2 deletions(-)

diff --git a/packages/ra-ui-materialui/src/input/BooleanInput.stories.tsx b/packages/ra-ui-materialui/src/input/BooleanInput.stories.tsx
index e3e7b675584..0a46a94dfcb 100644
--- a/packages/ra-ui-materialui/src/input/BooleanInput.stories.tsx
+++ b/packages/ra-ui-materialui/src/input/BooleanInput.stories.tsx
@@ -18,12 +18,35 @@ export const Basic = () => (
     </Wrapper>
 );
 
-export const Disabled = () => (
+export const Disabled = ({
+    defaultValue,
+    disabled,
+}: {
+    defaultValue: boolean;
+    disabled: boolean;
+}) => (
     <Wrapper>
-        <BooleanInput source="published" disabled />
+        <BooleanInput
+            source="published"
+            defaultValue={defaultValue}
+            disabled={disabled}
+        />
     </Wrapper>
 );
 
+Disabled.argTypes = {
+    defaultValue: {
+        control: 'boolean',
+    },
+    disabled: {
+        control: 'boolean',
+    },
+};
+Disabled.args = {
+    defaultValue: true,
+    disabled: true,
+};
+
 export const ReadOnly = () => (
     <Wrapper>
         <BooleanInput source="published" readOnly />