React、MUI 自动完成和 useState

Question

I'm trying to implement AutoComplete component of MUI in React but i'm getting some errors, can't understand what am I doing wrong.

Those are the errors I get:

MUI: The value provided to Autocomplete is invalid.
None of the options match with `{"id":"2","name":"Delta Super","description":"Deltamethrin 0.025%"}`.
You can use the `isOptionEqualToValue` prop to customize the equality test.

This is my code:

function PesticideAutoComplete(props) {

    const data = [
        {
            id: '1',
            name: 'Parmenona',
            description: 'Permethrin 0.020%',
        },
        {
            id: '2',
            name: 'Delta Super',
            description: 'Deltamethrin 0.025%',
        },
        {
            id: '3',
            name: 'Shoam',
            description: 'Bifenthrin 0.1%',
        }
    ];

    const defaultValue = { id: '1' };
    const [value, setValue] = useState(defaultValue);

    const defaultProps = {
        options: data,
        getOptionLabel: (option) => option.name,
    };

    return (
        <Autocomplete
            {...defaultProps}
            id="grid-choose-pesticide"
            clearOnEscape
            defaultValue={defaultValue}
            onChange={(event, newValue) => {
                console.log(newValue);
                setValue(newValue);
            }}
            renderInput={(params) => (
                <TextField {...params} label="Pesticide" />
            )}
        />
    );
}

Answer 1

I would not use the default prop if you want to put value use the options={} props to inject the values in to the ac component.

 < Autocomplete options = {data} getOptionLabel={(option) => option.name} id = "grid-choose-pesticide" clearOnEscape defaultValue = { defaultValue } onChange = { (event, newValue) => { console.log(newValue); setValue(newValue); } } renderInput = { (params) => ( < TextField { ...params } label = "Pesticide" / > ) } />

Answer 2

You need to override isOptionEqualToValue in your element:

<Autocomplete
    {...defaultProps}
    id="grid-choose-pesticide"
    clearOnEscape
    defaultValue={defaultValue}
    onChange={(event, newValue) => {
        console.log(newValue);
        setValue(newValue);
    }}
    renderInput={(params) => (
        <TextField {...params} label="Pesticide" />
    )}
    isOptionEqualToValue={(option, value) => option.id === value.id}
/>

The reason this happens is that the Autocomplete compares your selected object with a predefined one in the back. You can see the full explanation in this post .