evident-indigo•2y ago

Example of overriding getOne()

Is there an en example of how to Override the GetOne call to a graphql backend. I need to send additional parameters beside the ID. I have a simple custom graphql backend. I am not using the autogenerated ones.

5 Replies

kapa.ai•2y ago

Hi @davidd4309. 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

---------------------- Yes, you can override the getOne call and pass additional parameters using the meta field. Here's an example of how to do this: 1. Use the useOne hook and pass the meta object with your additional parameters:

import { useOne } from "@refinedev/core";

useOne({
  resource: "post",
  id: "1",
  meta: {
    headers: {
      "x-custom-header": "hello world",
    },
    additionalParam: "your_additional_param",
  },
});

import { useOne } from "@refinedev/core";

useOne({
  resource: "post",
  id: "1",
  meta: {
    headers: {
      "x-custom-header": "hello world",
    },
    additionalParam: "your_additional_param",
  },
});

2. Get the meta parameter from the data provider and modify the getOne method accordingly:

import { DataProvider } from "@refinedev/core";

export const dataProvider = (apiUrl: string): DataProvider => ({
  ...
  getOne: async ({ resource, id, variables, meta }) => {
    const { headers, additionalParam } = meta;
    const url = `${apiUrl}/${resource}/${id}`;

    httpClient.defaults.headers = {
      ...headers,
    };

    // Modify your GraphQL query to include the additional parameter
    const query = `
      query GetOne($id: ID!, $additionalParam: String!) {
        data: YourResource(id: $id, additionalParam: $additionalParam) {
          // Your fields here
        }
      }
    `;

    const { data } = await httpClient.post(url, { query, variables: { id, additionalParam } });

    return {
      data,
    };
  },
  ...
});

import { DataProvider } from "@refinedev/core";

export const dataProvider = (apiUrl: string): DataProvider => ({
  ...
  getOne: async ({ resource, id, variables, meta }) => {
    const { headers, additionalParam } = meta;
    const url = `${apiUrl}/${resource}/${id}`;

    httpClient.defaults.headers = {
      ...headers,
    };

    // Modify your GraphQL query to include the additional parameter
    const query = `
      query GetOne($id: ID!, $additionalParam: String!) {
        data: YourResource(id: $id, additionalParam: $additionalParam) {
          // Your fields here
        }
      }
    `;

    const { data } = await httpClient.post(url, { query, variables: { id, additionalParam } });

    return {
      data,
    };
  },
  ...
});

In this example, replace YourResource with the appropriate resource name in your GraphQL schema, and include the fields you want to fetch. For more information on using meta, refer to the Refine documentation (https://refine.dev/docs/api-reference/general-concepts/#meta). ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

General Concepts | refine

- refine core is fully independent of UI. So you can use core components and hooks without any UI dependency.

kapa.ai•2y ago

<@542609011220938753> kapa.ai is still learning and improving, please let us how it did by reacting below

sharp-indigo•2y ago

also you can check this https://refine.dev/docs/api-reference/core/providers/data-provider/#how-can-i-customize-existing-data-providers

Data Provider | refine

The data provider acts as a data layer for your app that makes the HTTP requests and encapsulates how the data is retrieved. refine consumes these methods via data hooks.

evident-indigoOP•2y ago

ok this worked. But if I don't have that default line i get an error. Any idea why or what should be in that line?

TS2322: Type '{ getOne: (resource: any, args: any, options: any) => Promise<any>; getList: <TData extends BaseRecord = BaseRecord>(params: { resource: string; pagination?: Pagination | undefined; ... 6 more ...; dataProviderName?: string | undefined; }) => Promise<...>; ... 8 more ...; custom: <TData extends BaseRecord = BaseReco...' is not assignable to type 'IDataContextProvider | IDataMultipleContextProvider'.
  Property 'default' is missing in type '{ getOne: (resource: any, args: any, options: any) => Promise<any>; getList: <TData extends BaseRecord = BaseRecord>(params: { resource: string; pagination?: Pagination | undefined; ... 6 more ...; dataProviderName?: string | undefined; }) => Promise<...>; ... 8 more ...; custom: <TData extends BaseRecord = BaseReco...' but required in type 'IDataMultipleContextProvider'.

const client = new GraphQLClient(API_URL);
const gqlDataProvider = dataProvider(client);

const myDataProvider = {
    ...gqlDataProvider,
    getOne: async (resource: any, args: any, options: any) => {
        const query =

query GetOne($id: ID!, $transLang: String!) { data: sentence(id: $id, transLang: $transLang) { ${resource.meta.fields} } }

;

        const result = await axios.post(
            API_URL,
            {query, variables: {id: resource.id, ...resource.meta.variables}},
            {headers: axiosHeaders},
        );

        return result.data.data;
    },
    default: gqlDataProvider,       //. <<---- why I need this. 
};