Error: A component is changing an uncontrolled input to be controlled.

Using MuiInferencer on an api that has a boolean field (isActive) it generates the following code:

              <Controller
                    control={control}
                    name="isActive"
                    // eslint-disable-next-line
                    defaultValue={null as any}
                    render={({ field }) => (
                        <FormControlLabel
                            label="Is Active"
                            control={
                                <Checkbox
                                    {...field}
                                    checked={field.value}
                                    onChange={(event) => {
                                        field.onChange(event.target.checked);
                                    }}
                                />
                            }
                        />
                    )}
                />

              <Controller
                    control={control}
                    name="isActive"
                    // eslint-disable-next-line
                    defaultValue={null as any}
                    render={({ field }) => (
                        <FormControlLabel
                            label="Is Active"
                            control={
                                <Checkbox
                                    {...field}
                                    checked={field.value}
                                    onChange={(event) => {
                                        field.onChange(event.target.checked);
                                    }}
                                />
                            }
                        />
                    )}
                />

The problem is that in the console I get the following error:

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.

Are we safe to ignore this error? I don't understand enough about React and what you've generated to make a sensible decision, but I don't like my console littered with errors.

7 Replies

kapa.ai•2y ago

Hi @johnwards. I'm kapa.ai, your friendly support bot. I will try to answer your question by searching through the knowledge base. :wave:

kapa.ai•2y ago

---------------------- I understand your concern about the console error. Based on the information extracts provided, I cannot directly address the issue with the MuiInferencer and the isActive field. However, I can provide some general guidance on the error message you're encountering. The error message you're seeing is related to the way React handles controlled and uncontrolled components. A controlled component has its value managed by React, while an uncontrolled component manages its own state internally. The error occurs when a component switches between being controlled and uncontrolled during its lifetime, which is not recommended. To fix this issue, you should ensure that the defaultValue for the Controller is consistently either undefined or a defined value, but not switching between the two. In your case, you can try setting the defaultValue to false instead of null as any, like this:

<Controller
  control={control}
  name="isActive"
  defaultValue={false}
  render={({ field }) => (
    <FormControlLabel
      label="Is Active"
      control={
        <Checkbox
          {...field}
          checked={field.value}
          onChange={(event) => {
            field.onChange(event.target.checked);
          }}
        />
      }
    />
  )}
/>

<Controller
  control={control}
  name="isActive"
  defaultValue={false}
  render={({ field }) => (
    <FormControlLabel
      label="Is Active"
      control={
        <Checkbox
          {...field}
          checked={field.value}
          onChange={(event) => {
            field.onChange(event.target.checked);
          }}
        />
      }
    />
  )}
/>

This should help eliminate the error message in the console. If you still encounter issues, I recommend referring to the refine documentation (https://refine.dev/docs) and blog (https://refine.dev/blog) for more information and examples. ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

Overview | refine

What is refine?

Blog | refine

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kapa.ai•2y ago

<@128446913274970112> kapa.ai is still learning and improving, please let us how it did by reacting below

harsh-harlequin•2y ago

Awesome! defaultValue={false} fixed it.. Good work @kapa.ai

kapa.ai•2y ago

Let me check the knowledge base for you. One moment! :books:

kapa.ai•2y ago

---------------------- Thank you for your kind words! I'm glad I could help. If you have any more questions or need further assistance related to refine, feel free to ask. Don't forget to check out the refine documentation (https://refine.dev/docs) and blog (https://refine.dev/blog) for more information and examples. ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

Overview | refine

What is refine?

Blog | refine

A Docusaurus powered blog!

kapa.ai•2y ago

<@128446913274970112> kapa.ai is still learning and improving, please let us how it did by reacting below