xenial-black•17mo ago

Set Null as default value in useSelect

 const { selectProps } = useSelect<IUser>({
    resource: "users",
    optionLabel: "name",
    optionValue: "id",
    defaultValue: null // I want a default null option if no one select
  })

 const { selectProps } = useSelect<IUser>({
    resource: "users",
    optionLabel: "name",
    optionValue: "id",
    defaultValue: null // I want a default null option if no one select
  })

Is there a way to always set select value to null by default of no option is selected?

9 Replies

kapa.ai•17mo ago

Hi @tads8799. I'm kapa.ai, your friendly support bot. I will try to answer your question by searching through the knowledge base. :wave: ---------------------- Yes, you can set the defaultValue to null in the useSelect hook to have a default null option if no one is selected. Here is how you can do it:

const { selectProps } = useSelect<IUser>({
    resource: "users",
    optionLabel: "name",
    optionValue: "id",
    defaultValue: null // I want a default null option if no one select
})

const { selectProps } = useSelect<IUser>({
    resource: "users",
    optionLabel: "name",
    optionValue: "id",
    defaultValue: null // I want a default null option if no one select
})

In this code, useSelect is a hook provided by Refine that allows you to fetch data from a resource and use it as options for a select box. The defaultValue property is used to set a default option for the select box. By setting it to null, you're specifying that if no option is selected, the value should be null. For more information, you can refer to the useSelect documentation (https://refine.dev/docs/api-reference/core/hooks/useSelect/). ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•17mo ago

<@577213996344803338> kapa.ai is still learning and improving, please let us know how it did by reacting below

xenial-blackOP•17mo ago

In the document, the type for defaultValue is BaseKey, which is string and number only, not null @kapa.ai

kapa.ai•17mo ago

Let me check the knowledge base for you. One moment! :books: Sorry @tads8799, I seem to be having a bit of trouble. Don't worry though, I've pinged my supprt and they will try to fix me up! :technologist: Perhaps try again in 15mins?

metropolitan-bronze•17mo ago

Hello @tads8799, I believe this is just a type error and will not effect logic can you try this please ?

const { selectProps } = useSelect({
        resource: "users",
        optionLabel: "name",
        optionValue: "id",
        defaultValue: null as unknown as undefined,
    });

const { selectProps } = useSelect({
        resource: "users",
        optionLabel: "name",
        optionValue: "id",
        defaultValue: null as unknown as undefined,
    });

hmm actually maybe it can. sorry. but no harm to try 😄 why you want to set default value to null ? maybe we can think other solutions for this problem besides null

xenial-blackOP•17mo ago

It's just how the backend and database is required, I must follow.😅

metropolitan-bronze•17mo ago

is it worked ?, by default useSelect's default value is [] maybe you can sent null value if array is empty https://refine.dev/docs/api-reference/antd/hooks/form/useForm/#how-can-i-change-the-form-data-before-submitting-it-to-the-api

xenial-blackOP•17mo ago

I manage to convince the backend deveoper to ommit the null case. But I'll take note of your answer. Tk you

metropolitan-bronze•17mo ago

I believe this is much better 😄

Set Null as default value in useSelect

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