getting error in custom data provider

Getting error in custom data provider , #data-provider #ask-any-question

11 Replies

Hi @chetanh2. I'm kapa.ai, your friendly support bot. I will try to answer your question by searching through the knowledge base. :wave: ---------------------- I'm sorry, but the information you provided is not clear enough to diagnose the issue. However, I can provide some general advice on handling errors in custom data providers in Refine. Refine expects errors to be extended from HttpError. You can handle errors in your data provider by implementing error handling in your data provider or using the Axios interceptor to transform the error from the response before Axios returns the response to your code. Here is a basic example of how to implement error handling in your data provider:

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

export const dataProvider = (apiUrl: string): DataProvider => ({  
 getOne: async ({ resource, id }) => {  
 try {  
 const response = await fetch(`<https://api.example.com/${resource}/${id}`>);  

 if (!response.ok) {  
 const error: HttpError = {  
 message: response.statusText,  
 statusCode: response.status,  
 };  
 return Promise.reject(error);  
 }  

 return {  
 data: response.data,  
 };  
 } catch (error) {  
 const error: HttpError = {  
 message: error?.message || "Something went wrong",  
 statusCode: error?.status || 500,  
 };  
 return Promise.reject(error);  
 }  
 },  
 // ...  
});

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

export const dataProvider = (apiUrl: string): DataProvider => ({  
 getOne: async ({ resource, id }) => {  
 try {  
 const response = await fetch(`<https://api.example.com/${resource}/${id}`>);  

 if (!response.ok) {  
 const error: HttpError = {  
 message: response.statusText,  
 statusCode: response.status,  
 };  
 return Promise.reject(error);  
 }  

 return {  
 data: response.data,  
 };  
 } catch (error) {  
 const error: HttpError = {  
 message: error?.message || "Something went wrong",  
 statusCode: error?.status || 500,  
 };  
 return Promise.reject(error);  
 }  
 },  
 // ...  
});

(Source: Refine Documentation (https://refine.dev/docs/core/providers/data-provider#error-format)) If you're still having trouble, please provide more specific details about the error you're encountering. ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•9mo ago

<@527528061952983050> kapa.ai is still learning and improving, please let us know how it did by reacting below

protestant-coral•9mo ago

@kapa.ai create a custom data provider

kapa.ai•9mo ago

Let me check the knowledge base for you. One moment! :books: ---------------------- Creating a custom data provider in Refine involves defining a set of methods that Refine can use to interact with your API. These methods should return a promise, meaning they are asynchronous. Here's a basic example of how you can create a custom data provider:

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

const dataProvider: DataProvider = {  
 // required methods  
 getList: ({ resource, pagination, sorters, filters, meta }) => Promise,  
 create: ({ resource, variables, meta }) => Promise,  
 update: ({ resource, id, variables, meta }) => Promise,  
 deleteOne: ({ resource, id, variables, meta }) => Promise,  
 getOne: ({ resource, id, meta }) => Promise,  
 getApiUrl: () => "",  
 // optional methods  
 getMany: ({ resource, ids, meta }) => Promise,  
 createMany: ({ resource, variables, meta }) => Promise,  
 deleteMany: ({ resource, ids, variables, meta }) => Promise,  
 updateMany: ({ resource, ids, variables, meta }) => Promise,  
 custom: ({ url, method, filters, sorters, payload, query, headers, meta }) => Promise,  
};

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

const dataProvider: DataProvider = {  
 // required methods  
 getList: ({ resource, pagination, sorters, filters, meta }) => Promise,  
 create: ({ resource, variables, meta }) => Promise,  
 update: ({ resource, id, variables, meta }) => Promise,  
 deleteOne: ({ resource, id, variables, meta }) => Promise,  
 getOne: ({ resource, id, meta }) => Promise,  
 getApiUrl: () => "",  
 // optional methods  
 getMany: ({ resource, ids, meta }) => Promise,  
 createMany: ({ resource, variables, meta }) => Promise,  
 deleteMany: ({ resource, ids, variables, meta }) => Promise,  
 updateMany: ({ resource, ids, variables, meta }) => Promise,  
 custom: ({ url, method, filters, sorters, payload, query, headers, meta }) => Promise,  
};

(Source: Refine Documentation (https://refine.dev/docs/core/providers/data-provider#methods)) Once you've created your custom data provider, you can pass it to the Refine component like this:

import { Refine } from "@refinedev/core";  
import { dataProvider } from "./rest-data-provider";  
  
const App = () => {  
 return (  
 <Refine  
 dataProvider={dataProvider}  
 /* ... */  
 />  
 );  
};

import { Refine } from "@refinedev/core";  
import { dataProvider } from "./rest-data-provider";  
  
const App = () => {  
 return (  
 <Refine  
 dataProvider={dataProvider}  
 /* ... */  
 />  
 );  
};

(Source: Refine Documentation (https://refine.dev/docs/packages/data-providers/simple-rest#customizing-the-data-provider-)) For more detailed information on creating a custom data provider, you can refer to the "Create Data Provider From Scratch" section (https://refine.dev/docs/tutorial/understanding-dataprovider/create-dataprovider/) in the Refine tutorial. ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•9mo ago

<@527528061952983050> kapa.ai is still learning and improving, please let us know how it did by reacting below

protestant-coral•9mo ago

@kapa.ai getting this error. Type '{ getList: (resource: string) => Promise<{ data: any; total: number; }>; }' is not assignable to type 'IDataContextProvider | IDataMultipleContextProvider' @kapa.ai getting this error. Type '{ getList: (resource: string) => Promise<{ data: any; total: number; }>; }' is not assignable to type 'IDataContextProvider | IDataMultipleContextProvider'

kapa.ai•9mo ago

Let me check the knowledge base for you. One moment! :books: ---------------------- The error message you're seeing suggests that the object you're trying to assign to the data provider does not match the expected type. In Refine, a data provider is expected to be an object with a specific set of methods, each of which returns a Promise. In your case, it seems like you're only providing the getList method. However, Refine requires a few more methods to be defined in your data provider. Here's a basic example of what a data provider might look like:

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

const dataProvider: DataProvider = {  
 // required methods  
 getList: ({ resource, pagination, sorters, filters, meta }) => Promise,  
 create: ({ resource, variables, meta }) => Promise,  
 update: ({ resource, id, variables, meta }) => Promise,  
 deleteOne: ({ resource, id, variables, meta }) => Promise,  
 getOne: ({ resource, id, meta }) => Promise,  
 getApiUrl: () => "",  
 // optional methods  
 getMany: ({ resource, ids, meta }) => Promise,  
 createMany: ({ resource, variables, meta }) => Promise,  
 deleteMany: ({ resource, ids, variables, meta }) => Promise,  
 updateMany: ({ resource, ids, variables, meta }) => Promise,  
 custom: ({ url, method, filters, sorters, payload, query, headers, meta }) => Promise,  
};

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

const dataProvider: DataProvider = {  
 // required methods  
 getList: ({ resource, pagination, sorters, filters, meta }) => Promise,  
 create: ({ resource, variables, meta }) => Promise,  
 update: ({ resource, id, variables, meta }) => Promise,  
 deleteOne: ({ resource, id, variables, meta }) => Promise,  
 getOne: ({ resource, id, meta }) => Promise,  
 getApiUrl: () => "",  
 // optional methods  
 getMany: ({ resource, ids, meta }) => Promise,  
 createMany: ({ resource, variables, meta }) => Promise,  
 deleteMany: ({ resource, ids, variables, meta }) => Promise,  
 updateMany: ({ resource, ids, variables, meta }) => Promise,  
 custom: ({ url, method, filters, sorters, payload, query, headers, meta }) => Promise,  
};

(Source: Refine Documentation (https://refine.dev/docs/core/providers/data-provider#methods)) Please ensure that your data provider includes all the required methods. If you're still having trouble, please provide more specific details about your implementation. ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•9mo ago

<@527528061952983050> kapa.ai is still learning and improving, please let us know how it did by reacting below

protestant-coral•9mo ago

@kapa.ai i used getList method , review my code import axios, { AxiosInstance } from "axios"; import { DataProvider, HttpError } from "@refinedev/core"; import { stringify } from "query-string"; // Error handling with axios interceptors const axiosInstance = axios.create(); axiosInstance.interceptors.response.use( (response) => { return response; }, (error) => { const customError: HttpError = { ...error, message: error.response?.data?.message, statusCode: error.response?.status, }; return Promise.reject(customError); }, ); export const dataProviderNew = (apiUrl: string) => ({ getList: async (resource: string) => { const url = ${apiUrl}/${resource}; const { data, headers } = await axiosInstance.get(url); const total = +headers["x-total-count"]; return { data, total, }; }, });

kapa.ai•9mo ago

Let me check the knowledge base for you. One moment! :books: ---------------------- Your code for creating a custom data provider with the getList method seems correct. It creates an Axios instance, sets up an interceptor for handling HTTP errors, and defines a getList method that fetches data from a given resource and returns it along with the total count. However, please note that Refine expects a data provider to have a few more methods defined. These include create, update, deleteOne, getOne, getApiUrl, and optionally getMany, createMany, deleteMany, updateMany, and custom. Here's a basic example of what a complete data provider might look like:

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

const dataProvider: DataProvider = {  
 // required methods  
 getList: ({ resource, pagination, sorters, filters, meta }) => Promise,  
 create: ({ resource, variables, meta }) => Promise,  
 update: ({ resource, id, variables, meta }) => Promise,  
 deleteOne: ({ resource, id, variables, meta }) => Promise,  
 getOne: ({ resource, id, meta }) => Promise,  
 getApiUrl: () => "",  
 // optional methods  
 getMany: ({ resource, ids, meta }) => Promise,  
 createMany: ({ resource, variables, meta }) => Promise,  
 deleteMany: ({ resource, ids, variables, meta }) => Promise,  
 updateMany: ({ resource, ids, variables, meta }) => Promise,  
 custom: ({ url, method, filters, sorters, payload, query, headers, meta }) => Promise,  
};

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

const dataProvider: DataProvider = {  
 // required methods  
 getList: ({ resource, pagination, sorters, filters, meta }) => Promise,  
 create: ({ resource, variables, meta }) => Promise,  
 update: ({ resource, id, variables, meta }) => Promise,  
 deleteOne: ({ resource, id, variables, meta }) => Promise,  
 getOne: ({ resource, id, meta }) => Promise,  
 getApiUrl: () => "",  
 // optional methods  
 getMany: ({ resource, ids, meta }) => Promise,  
 createMany: ({ resource, variables, meta }) => Promise,  
 deleteMany: ({ resource, ids, variables, meta }) => Promise,  
 updateMany: ({ resource, ids, variables, meta }) => Promise,  
 custom: ({ url, method, filters, sorters, payload, query, headers, meta }) => Promise,  
};

(Source: Refine Documentation (https://refine.dev/docs/core/providers/data-provider#methods)) If you're only interested in fetching lists of resources and don't need the other CRUD operations, your current implementation should work fine. However, if you plan to perform other operations, you'll need to implement the corresponding methods. ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•9mo ago

<@527528061952983050> kapa.ai is still learning and improving, please let us know how it did by reacting below