Empty (null/undefined) properties are not submitted in SelectArrayInput, SelectInput, DateInput

[yonitou]

What you were expecting:
When I have a SimpleForm, every key/value couple that is present in the form must be present in the final object when submitting it

What happened instead:
For some kind of inputs : DateInput, SelectArrayInput, SelectInput, if the input has not been touched (is not dirty), the key is not present in the final object.
I tried to use parse, format, sanitizeEmptyValues, transformOptions, defaultValue, none of them worked. I don't know in which version the issue appeared but I know that it was working before.

Related code:

<SelectInput
	choices={[{id: 1, name: "test"}, {id: 2, name: "test2}]}
	label="resources.usages.fields.doseIsCheck"
	source="doseIsCheck"
/>

When using a simple SelectInput like this one, if I'm not "touching" the input, the key doseIsCheck won't be present when submitting the form. I didn't customize any parent component like Create or SimpleForm. It's really boiler plate code

Environment

• React-admin version: 6.5.4
• Last version that did not exhibit the issue (if applicable): Hard to say :/
• React version: 18
• Browser: Safari

[djhi]

Thanks for reporting this. Please provide a sample application showing the issue, preferably a sandbox forked from

• https://codesandbox.io/p/github/marmelab/react-admin-sandbox/main (v5)
• https://stackblitz.com/github/marmelab/react-admin/tree/master/examples/simple (v5)
• https://stackblitz.com/github/marmelab/react-admin/tree/4.x/examples/simple (v4)

[saloua-ch]

I tried to reproduce this issue in react-admin v5.6.4 but couldn't replicate the problem. Here's what I tested:

1. Created a test form with all the mentioned input types:

   • SelectInput with default value
   • DateInput with default value
   • SelectArrayInput with default value

2. Test setup:

const PostCreateTest = () => {
  const notify = useNotify();

  const onSubmit = (data) => {
    console.log('Form submission data:', data);
    notify('Form submitted with data: ' + JSON.stringify(data));
  };

  return (
    <Create>
      <SimpleForm onSubmit={onSubmit}>
        <TextInput source="title" required />
        <SelectInput
          source="category"
          choices={[
            { id: 'tech', name: 'Technology' },
            { id: 'lifestyle', name: 'Lifestyle' },
          ]}
          defaultValue="tech"
        />
        <DateInput
          source="publishedAt"
          defaultValue={new Date().toISOString().split('T')[0]}
        />
        <SelectArrayInput
          source="tags"
          choices={[
            { id: 'js', name: 'JavaScript' },
            { id: 'react', name: 'React' },
            { id: 'ts', name: 'TypeScript' },
          ]}
          defaultValue={['js']}
        />
      </SimpleForm>
    </Create>
  );
};

3. Results:

• When submitting the form without touching any inputs except the required title field
• All default values are properly included in the submission data:

{
  "category": "tech",
  "publishedAt": "2025-04-25",
  "tags": ["js"],
  "title": "title"
}

This suggests the issue might be specific to v6.5.4. Could you provide:

1. A minimal reproduction in v6.5.4 showing the missing values?
2. The exact steps to reproduce in that version?

You can fork and modify this example: https://stackblitz.com/edit/github-vnan7rfb?file=src%2Fposts%2FPostCreate.tsx,src%2Fposts%2FPostCreateTest.tsx,src%2Fposts%2Findex.tsx