stormy-gold•14mo ago

Is there a Relationship selector for Refine

I want to use a Relationship selector like M2M dropdown mit a multi select or One To Many / Many To One with a single select.

11 Replies

kapa.ai•14mo ago

Hi @justin99b. I'm kapa.ai, your friendly support bot. I will try to answer your question by searching through the knowledge base. :wave: ---------------------- In Refine, you can use the useSelect hook to handle relationships between resources. This hook fetches the data by passing the params to the dataProvider's getList method and then returns the options to be used in the select component. Here's an example of how you can use the useSelect hook to fetch categories and use them as options in a select dropdown:

const { options: categoryOptions } = useSelect({  
 resource: "categories",  
});

const { options: categoryOptions } = useSelect({  
 resource: "categories",  
});

This will fetch the categories and provide them as options for the select dropdown. The user can then select a category when creating or editing a post. If you want to use a multi-select dropdown, you can use the mode prop of Ant Design's Select component and set it to 'multiple'. Here's an example:

<Select {...categoryOptions} mode='multiple' />

<Select {...categoryOptions} mode='multiple' />

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•14mo ago

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stormy-goldOP•14mo ago

@kapa.ai how do you use that inside a useForm.

kapa.ai•14mo ago

Let me check the knowledge base for you. One moment! :books: ---------------------- You can use the useSelect hook inside a useForm hook in Refine. Here's an example of how you can do this:

import { useSelect } from "@refinedev/core";  
import { useForm } from "@refinedev/react-hook-form";  

export const PostEdit: React.FC = () => {  
 const {  
 refineCore: { onFinish, formLoading, queryResult },  
 register,  
 handleSubmit,  
 resetField,  
 formState: { errors },  
 } = useForm();  

 const { options } = useSelect({  
 resource: "categories",  
 defaultValue: queryResult?.data?.data.category.id,  
 });  

 useEffect(() => {  
 resetField("category.id");  
 }, [options]);  

 return (  
 <form onSubmit={handleSubmit(onFinish)}>  
 <label>Category: </label>  
 <select  
 {...register("category.id", {  
 required: true,  
 })}  
 defaultValue={queryResult?.data?.data.category.id}  
 >  
 {options?.map((category) => (  
 <option key={category.value} value={category.value}>  
 {category.label}  
 </option>  
 ))}  
 </select>  
 {errors.category && <span>This field is required</span>}  
 <br />  
 <input type="submit" value="Submit" />
 </form>
 );
};

import { useSelect } from "@refinedev/core";  
import { useForm } from "@refinedev/react-hook-form";  

export const PostEdit: React.FC = () => {  
 const {  
 refineCore: { onFinish, formLoading, queryResult },  
 register,  
 handleSubmit,  
 resetField,  
 formState: { errors },  
 } = useForm();  

 const { options } = useSelect({  
 resource: "categories",  
 defaultValue: queryResult?.data?.data.category.id,  
 });  

 useEffect(() => {  
 resetField("category.id");  
 }, [options]);  

 return (  
 <form onSubmit={handleSubmit(onFinish)}>  
 <label>Category: </label>  
 <select  
 {...register("category.id", {  
 required: true,  
 })}  
 defaultValue={queryResult?.data?.data.category.id}  
 >  
 {options?.map((category) => (  
 <option key={category.value} value={category.value}>  
 {category.label}  
 </option>  
 ))}  
 </select>  
 {errors.category && <span>This field is required</span>}  
 <br />  
 <input type="submit" value="Submit" />
 </form>
 );
};

In this example, the useSelect hook is used to fetch the categories and provide them as options for the select dropdown in the form. The useForm hook is used to handle the form submission. The register function from useForm is used to register the select input for validation and submission. For more detailed information, you can refer to the useForm documentation (https://refine.dev/docs/packages/documentation/react-hook-form/useForm/) and 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•14mo ago

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stormy-goldOP•14mo ago

@kapa.ai istn there a better way to do this? like predefined components or someting that just does that for me?

kapa.ai•14mo ago

Let me check the knowledge base for you. One moment! :books: ---------------------- Refine provides a set of predefined components that you can use to handle relationships between resources. However, based on the information provided in the extracts, the useSelect hook is the primary method for handling such relationships. If you're looking for a more automated way to generate forms, Refine's Inferencer might be of interest. The Inferencer can automatically generate create/edit forms based on your data. If it doesn't work as expected, you can manually modify the inferred fields using the fieldTransformer function. More information about this can be found in the Modifying the inferred fields (https://refine.dev/docs/packages/documentation/inferencer#modifying-the-inferred-fields) section of the documentation. However, please note that the Inferencer relies on the data returned by the dataProvider to generate the CRUD pages. If you don't have data for those resources yet, you might need to manually create your resources and establish the proper relationships before running the Inferencer. If you find that the Inferencer doesn't meet your needs, you might consider manually creating your CRUD pages. This would give you more control over the design and functionality of the pages. You can refer to the Generating CRUD pages automatically with Inferencer (https://refine.dev/docs/tutorial/getting-started/headless/generate-crud-pages) for more details. ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•14mo ago

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stormy-goldOP•14mo ago

@kapa.ai so there is no easy way to build a form to edit a resource with relations?

kapa.ai•14mo ago

Let me check the knowledge base for you. One moment! :books: ---------------------- Refine does provide a way to build forms to edit a resource with relations using the Select component from Ant Design and the useSelect hook from Refine. However, it requires some manual setup to fetch the related resources and provide them as options in the select dropdown. Here's an example of how you can do this:

import { useSelect, useForm, Edit, Form, Select } from "@pankod/refine";

export const PostEdit: React.FC = () => {
    const { formProps, saveButtonProps } = useForm();

    const { options } = useSelect({
        resource: "categories",
    });

    return (
        <Edit saveButtonProps={saveButtonProps}>
            <Form {...formProps} layout="vertical">
                <Form.Item label="Category" name="category">
                    <Select options={options} />
                </Form.Item>
                {/* other form items */}
            </Form>
        </Edit>
    );
};

import { useSelect, useForm, Edit, Form, Select } from "@pankod/refine";

export const PostEdit: React.FC = () => {
    const { formProps, saveButtonProps } = useForm();

    const { options } = useSelect({
        resource: "categories",
    });

    return (
        <Edit saveButtonProps={saveButtonProps}>
            <Form {...formProps} layout="vertical">
                <Form.Item label="Category" name="category">
                    <Select options={options} />
                </Form.Item>
                {/* other form items */}
            </Form>
        </Edit>
    );
};

In this example, the useSelect hook is used to fetch the categories and provide them as options for the select dropdown in the form. The useForm hook is used to handle the form submission. For more detailed information, you can refer to the useForm documentation (https://refine.dev/docs/packages/documentation/react-hook-form/useForm/) and 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•14mo ago

<@337253340121399296> kapa.ai is still learning and improving, please let us know how it did by reacting below