wise-white•9mo ago

Query Resource by specific field

I need a way of retrieving a resource by a field other than the Id. For example if I have a Resource called customer which has a telephoneNumber field, I need to be able to query the record which has a specific telephoneNumber value.

12 Replies

kapa.ai•9mo ago

Hi @jacktrent. I'm kapa.ai, your friendly support bot. I will try to answer your question by searching through the knowledge base. :wave: ---------------------- Refine provides a way to fetch data based on specific fields using filters. You can use the filters prop in the data fetching methods to specify the field and the value you want to filter by. Here is an example of how you can do this:

const filter = filters?.[0];
const params = [];
if (filter && "field" in filter) {
params.push(`${filter.field}=${filter.value}`);
}
// combine all params with "&" character to create query string.
const query = params.join("&");
const response = await fetch(`${url}/${resource}?${query}`);
const data = await response.json();
return {
data,
total: data.length,
};

const filter = filters?.[0];
const params = [];
if (filter && "field" in filter) {
params.push(`${filter.field}=${filter.value}`);
}
// combine all params with "&" character to create query string.
const query = params.join("&");
const response = await fetch(`${url}/${resource}?${query}`);
const data = await response.json();
return {
data,
total: data.length,
};

In this example, filters is an array where each item is an object that specifies the field to filter by and the value to match. The field property is the name of the field, and the value property is the value to match. So, if you want to fetch a customer with a specific telephone number, you can do something like this:

const filters = [
  {
    field: 'telephoneNumber',
    value: '1234567890', // replace with the actual telephone number
  },
];

const filters = [
  {
    field: 'telephoneNumber',
    value: '1234567890', // replace with the actual telephone number
  },
];

Then, you can pass this filters array to the data fetching method. Please note that the actual implementation may vary depending on the data provider you are using. You can refer to the Data Fetching (https://refine.dev/docs/guides-concepts/data-fetching#relationships) section of the Refine documentation for more information. ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•9mo ago

<@160462833044160513> kapa.ai is still learning and improving, please let us know how it did by reacting below

wise-white•9mo ago

@kapa.ai Can I have an example of this which uses the useOne hook?

kapa.ai•9mo ago

Let me check the knowledge base for you. One moment! :books: ---------------------- I'm sorry for any confusion, but the useOne hook in Refine is designed to fetch a single record based on its id property. It doesn't support fetching a record based on other fields directly. Here's how you typically use the useOne hook:

import { useOne } from "@refinedev/core";  
  
const { data } = useOne({ resource: "posts", id: 1 });

import { useOne } from "@refinedev/core";  
  
const { data } = useOne({ resource: "posts", id: 1 });

In this example, useOne is used to fetch a post with an id of 1. If you need to fetch a record based on a field other than id, you might need to create a custom hook that uses the useQuery or useCustom hook under the hood, or modify your backend to support fetching a record by a field other than id. For more information, you can refer to the useOne (https://refine.dev/docs/data/hooks/use-one/) and useCustom (https://refine.dev/docs/data/hooks/use-custom/) sections of the Refine documentation. ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•9mo ago

<@160462833044160513> kapa.ai is still learning and improving, please let us know how it did by reacting below

wise-white•9mo ago

@kapa.ai Create an example using the useCustom hook

kapa.ai•9mo ago

Let me check the knowledge base for you. One moment! :books: ---------------------- Sure, here's an example of how you can use the useCustom hook to send a custom query request. In this example, we're sending a GET request to an endpoint /posts-unique-check:

import { useCustom, useApiUrl } from "@refinedev/core";  
  
interface PostUniqueCheckResponse {  
 isAvailable: boolean;  
}  
  
const apiUrl = useApiUrl();  
  
const { data, isLoading } = useCustom<PostUniqueCheckResponse>({  
 url: `${apiUrl}/posts-unique-check`,  
 method: "get",  
 config: {  
 headers: {  
 "x-custom-header": "foo-bar",  
 },  
 query: {  
 title: "Foo bar",  
 },  
 },  
});

import { useCustom, useApiUrl } from "@refinedev/core";  
  
interface PostUniqueCheckResponse {  
 isAvailable: boolean;  
}  
  
const apiUrl = useApiUrl();  
  
const { data, isLoading } = useCustom<PostUniqueCheckResponse>({  
 url: `${apiUrl}/posts-unique-check`,  
 method: "get",  
 config: {  
 headers: {  
 "x-custom-header": "foo-bar",  
 },  
 query: {  
 title: "Foo bar",  
 },  
 },  
});

In this example, useApiUrl is used to get the base URL of the API endpoint. The useCustom hook is then used to send a request to the endpoint. The useCustom hook expects a url, method, and config properties. The url property accepts the endpoint URL, the method property accepts the type of method of the endpoint (a "get" endpoint in this case), and the config property accepts values like the headers for the endpoint, query parameters, and more. When properties are changed, the useCustom hook will trigger a new request. You can then use the data and isLoading variables in your component to display the data or a loading indicator. For more information, you can refer to the useCustom (https://refine.dev/docs/data/hooks/use-custom/) section of the Refine documentation. ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•9mo ago

<@160462833044160513> kapa.ai is still learning and improving, please let us know how it did by reacting below

wise-white•9mo ago

@kapa.ai create a complete example on how to query a resource by the telephone field

kapa.ai•9mo ago

Let me check the knowledge base for you. One moment! :books: ---------------------- Sure, here's an example of how you can use the useCustom hook to fetch a customer record based on a telephone number:

import { useCustom } from "@pankod/refine";

const telephoneNumber = "1234567890"; // replace with the actual telephone number

const { data, isLoading } = useCustom({
    resource: "customers",
    method: "getList",
    query: {
        filter: { telephoneNumber },
    },
});

if (isLoading) {
    return <div>Loading...</div>;
}

if (data) {
    return (
        <div>
            <h1>Customer Details</h1>
            <p>Name: {data[0]?.name}</p>
            <p>Telephone: {data[0]?.telephoneNumber}</p>
        </div>
    );
}

return null;

import { useCustom } from "@pankod/refine";

const telephoneNumber = "1234567890"; // replace with the actual telephone number

const { data, isLoading } = useCustom({
    resource: "customers",
    method: "getList",
    query: {
        filter: { telephoneNumber },
    },
});

if (isLoading) {
    return <div>Loading...</div>;
}

if (data) {
    return (
        <div>
            <h1>Customer Details</h1>
            <p>Name: {data[0]?.name}</p>
            <p>Telephone: {data[0]?.telephoneNumber}</p>
        </div>
    );
}

return null;

In this example, useCustom is used to send a getList request to the customers resource with a filter for the telephoneNumber field. The data variable will then contain the customer record that matches the telephone number. Please note that the actual implementation may vary depending on the data provider you are using and how it handles filters. You may need to adjust the query property accordingly. For more information, you can refer to the useCustom (https://refine.dev/docs/data/hooks/use-custom/) section of the Refine documentation. ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•9mo ago

<@160462833044160513> kapa.ai is still learning and improving, please let us know how it did by reacting below

other-emerald•9mo ago

Hey @jacktrent, hope the bot helped. You have couple of options to achieve this; - Using useList and filters to query the field you wanted - You can customize the getOne method of your data provider and use meta fields to instruct it to do custom queries/requests. - You can use the useCustom hook to make custom requests to your API with help of your data provider.