Getting warning that a component is changing an uncontrolled input to be controlled while trying to Pass empty array to Autocomplete component-MUI

user_4494813 0
Viewed 4523

I am new to react and material UI and struggling to load Autocomplete component options dynamically.

Initially, I am setting empty array as initial option until data is fetched from the database. Once I get my data I update the Autocomplete options with my data and it's working but at the same time I am getting the following warning

Warning: A component is changing an uncontrolled input to be controlled. This is likely caused by the value changing from undefined to a defined value, which should not happen. Decide between using a controlled or uncontrolled input element for the lifetime of the component.

My code

const [listItems, setListItems] = useState([]);

    const {formik, items} = props;

    const handleGetOptionSelected = (option, value) => {
        if (!items) {
            return {};
        }
        return option.id === value.id;
    };

    const handleGetOptionLabel = (option) => {
        if (!items) {
            return 'No Options';
        }
        return option.name;
    };

    useEffect(() => {
        if (items) {
            setListItems(items);
        }
    }, [items]);

return (

        <Autocomplete
            className={classes.autoComplete}
            multiple
            id="tags-standard"
            options={listItems}
            getOptionLabel={(option) => handleGetOptionLabel(option)}
            getOptionSelected={(option, value) => handleGetOptionSelected(option, value)}
            onChange={(event, selectedValues) => {
                formik.setFieldValue(
                    "tag_ids",
                    getCollectionColumn(selectedValues, 'id'),
                    false
                );
            }}
            renderInput={(params) => (
                <TextField
                    {...params}
                    variant="standard"
                    placeholder="select tags"
                    name="tag_ids"
                    error={formik.touched.tag_ids && Boolean(formik.errors.tag_ids)}
                    helperText={formik.touched.tag_ids && formik.errors.tag_ids}
                />
            )}
        />

    );
single-page-application material-ui reactjs javascript
1 Answers

For an input to be controlled, its value must correspond to that of a state variable.

That condition is not initially met in your example because your state is not initially set before onChange. Therefore, the input is initially uncontrolled. Once the onChange handler is triggered for the first time, your formik data state gets set. At that point, the above condition is satisfied and the input is considered to be controlled. This transition from uncontrolled to controlled produces the error seen above.

By initializing formik data structure in the constructor to an empty string the input will be controlled from the start, fixing the issue.

e.g If you want to set name inside formik then initialize it as empty string then change it 
on onChange according to need. Like this:  
  
   constructor(props) {
        super(props);
        this.state = { name: '' }
    }

I don't know your data structure so you can try this on your own by mimicking this. See React Controlled Components for more examples. Also try this solution

user_112135510
Related