useSelect defaultValue is not populating

2 Replies

Hi @japope. I'm kapa.ai, your friendly support bot. I will try to answer your question by searching through the knowledge base. :wave: ---------------------- The defaultValue property in the useSelect hook allows you to set default options for a <select> component. However, if there are many entries for the <select> and pagination is required, the defaultValue may not be present in the current visible options, which can cause the <select> component to malfunction. To avoid this, a separate useMany query is sent to the backend with the defaultValue and appended to the options of <select>, ensuring the default values exist in the current options array. The defaultValue can be a single value or an array of values. Here's an example:

useSelect({  
 defaultValue: 1, // or [1, 2]  
});

useSelect({  
 defaultValue: 1, // or [1, 2]  
});

If you only have an id and need to show it selected in the selection box, you can use the useMany hook to send a request, get the data, and mark it as selected. Here's an example:

import { useSelect } from "@refinedev/core";  
  
interface ICategory {  
 id: number;  
 title: string;  
}  
  
const ProductCreate: React.FC = () => {  
 const { options } = useSelect<ICategory>({  
 resource: "categories",  
 defaultValue: 20,  
 });  
  
 return (  
 <label>  
 Select a category:  
 <select>  
 {options?.map((option) => (  
 <option key={option.value} value={option.value}>  
 {option.value}-{option.label}  
 </option>  
 ))}  
 </select>  
 </label>  
 );  
};

import { useSelect } from "@refinedev/core";  
  
interface ICategory {  
 id: number;  
 title: string;  
}  
  
const ProductCreate: React.FC = () => {  
 const { options } = useSelect<ICategory>({  
 resource: "categories",  
 defaultValue: 20,  
 });  
  
 return (  
 <label>  
 Select a category:  
 <select>  
 {options?.map((option) => (  
 <option key={option.value} value={option.value}>  
 {option.value}-{option.label}  
 </option>  
 ))}  
 </select>  
 </label>  
 );  
};

For more information, refer to the useMany documentation (https://refine.dev/docs/data/hooks/use-many/) and the useSelect documentation (https://refine.dev/docs/data/hooks/use-select#defaultvalue). ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•6mo ago

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