eastern-cyan•3w ago

How do I useManyLists?

I call my list endpoint with 2 query params, let's call them refTable and refID. I need to call the /getObjects for each entry of the following array. const inputArray = [ { refTable: "Pokemone", refID: "id1" }, { refTable: "Animals", refID: "id2" }, ]

11 Replies

kapa.ai•3w ago

Hi @AK. I'm kapa.ai, your friendly support bot. I will try to answer your question by searching through the knowledge base. :wave: ---------------------- I apologize, but there is no specific "useManyLists" hook in refine. However, based on your question, I can suggest using the useMany hook, which is designed to fetch multiple records from a resource. Here's how you can approach your scenario: You can use the useMany hook for each entry in your input array. Here's an example of how you might structure this:

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

const YourComponent = () => {
  const inputArray = [
    { refTable: "Pokemon", refID: "id1" },
    { refTable: "Animals", refID: "id2" },
  ];

  const pokemonResult = useMany({
    resource: "Pokemon",
    ids: ["id1"],
  });

  const animalsResult = useMany({
    resource: "Animals",
    ids: ["id2"],
  });

  // Handle loading and error states as needed

  return (
    <div>
      {/* Render your data here */}
    </div>
  );
};

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

const YourComponent = () => {
  const inputArray = [
    { refTable: "Pokemon", refID: "id1" },
    { refTable: "Animals", refID: "id2" },
  ];

  const pokemonResult = useMany({
    resource: "Pokemon",
    ids: ["id1"],
  });

  const animalsResult = useMany({
    resource: "Animals",
    ids: ["id2"],
  });

  // Handle loading and error states as needed

  return (
    <div>
      {/* Render your data here */}
    </div>
  );
};

In this example, we're using separate useMany calls for each entry in your input array. The resource parameter corresponds to your refTable, and the ids array contains your refID. If you need to dynamically handle an unknown number of entries, you might consider creating a custom hook or using React's useMemo to generate the necessary useMany calls based on your input array. For more detailed information on how to use the useMany hook, you can refer to the useMany documentation. Remember that useMany is designed to fetch multiple records from a single resource. If you need to fetch from different resources (as in your example with "Pokemon" and "Animals"), you'll need separate useMany calls for each resource. ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•3w ago

<@1298702566271484007> Kapa.ai is still learning and improving, please let me know how I did by reacting below.

eastern-cyanOP•3w ago

the input array will come as input @kapa.ai

kapa.ai•3w ago

Let me check the knowledge base for you again. One moment! :books: ---------------------- I understand that the input array will be dynamic and come as an input. In this case, we need to handle multiple useMany calls dynamically based on the input array. Here's an approach you can use:

import React from "react";
import { useMany, GetManyResponse } from "@refinedev/core";

interface InputItem {
  refTable: string;
  refID: string;
}

const DynamicFetchComponent: React.FC<{ inputArray: InputItem[] }> = ({ inputArray }) => {
  const results = inputArray.map((item) => 
    useMany({
      resource: item.refTable,
      ids: [item.refID],
    })
  );

  return (
    <div>
      {results.map((result, index) => (
        <div key={index}>
          <h2>{inputArray[index].refTable}</h2>
          {result.isLoading ? (
            <p>Loading...</p>
          ) : result.isError ? (
            <p>Error: {result.error?.message}</p>
          ) : (
            <pre>{JSON.stringify(result.data, null, 2)}</pre>
          )}
        </div>
      ))}
    </div>
  );
};

import React from "react";
import { useMany, GetManyResponse } from "@refinedev/core";

interface InputItem {
  refTable: string;
  refID: string;
}

const DynamicFetchComponent: React.FC<{ inputArray: InputItem[] }> = ({ inputArray }) => {
  const results = inputArray.map((item) => 
    useMany({
      resource: item.refTable,
      ids: [item.refID],
    })
  );

  return (
    <div>
      {results.map((result, index) => (
        <div key={index}>
          <h2>{inputArray[index].refTable}</h2>
          {result.isLoading ? (
            <p>Loading...</p>
          ) : result.isError ? (
            <p>Error: {result.error?.message}</p>
          ) : (
            <pre>{JSON.stringify(result.data, null, 2)}</pre>
          )}
        </div>
      ))}
    </div>
  );
};

This component takes the inputArray as a prop and uses useMany for each item in the array. It then renders the results, handling loading and error states for each query. You can use this component like this:

const YourParentComponent = () => {
  const inputArray = [
    { refTable: "Pokemon", refID: "id1" },
    { refTable: "Animals", refID: "id2" },
  ];

  return <DynamicFetchComponent inputArray={inputArray} />;
};

const YourParentComponent = () => {
  const inputArray = [
    { refTable: "Pokemon", refID: "id1" },
    { refTable: "Animals", refID: "id2" },
  ];

  return <DynamicFetchComponent inputArray={inputArray} />;
};

This approach allows you to handle a dynamic input array and fetch data for each item using useMany. However, please note that this method will create a separate network request for each item in your input array. If you have a large number of items, this could lead to performance issues. In such cases, you might want to consider implementing a custom endpoint on your backend that can handle multiple resources and IDs in a single request, and then use useCustom hook to fetch data from that endpoint. For more information on useMany and other data hooks, you can refer to the refine data hooks documentation. ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•3w ago

<@1298702566271484007> Kapa.ai is still learning and improving, please let me know how I did by reacting below.

eastern-cyanOP•3w ago

@kapa.ai you cannot use hooks inside a callback you need to use the useList in multiple times, hence I called it useManyLists, so do not use useMany in the exmple, use useList

kapa.ai•3w ago

Let me check the knowledge base for you again. One moment! :books: ---------------------- I apologize for the confusion in my previous response. You're absolutely correct that we can't use hooks inside a callback, and we should use useList instead of useMany as per your requirement. Let's correct this approach using useList. Here's how you can implement it:

import React from "react";
import { useList } from "@refinedev/core";

interface InputItem {
  refTable: string;
  refID: string;
}

const DynamicFetchComponent: React.FC<{ inputArray: InputItem[] }> = ({ inputArray }) => {
  const results = inputArray.map((item) => 
    useList({
      resource: item.refTable,
      filters: [
        {
          field: "id",
          operator: "eq",
          value: item.refID,
        },
      ],
    })
  );

  return (
    <div>
      {results.map((result, index) => (
        <div key={index}>
          <h2>{inputArray[index].refTable}</h2>
          {result.isLoading ? (
            <p>Loading...</p>
          ) : result.isError ? (
            <p>Error: {result.error?.message}</p>
          ) : (
            <pre>{JSON.stringify(result.data, null, 2)}</pre>
          )}
        </div>
      ))}
    </div>
  );
};

import React from "react";
import { useList } from "@refinedev/core";

interface InputItem {
  refTable: string;
  refID: string;
}

const DynamicFetchComponent: React.FC<{ inputArray: InputItem[] }> = ({ inputArray }) => {
  const results = inputArray.map((item) => 
    useList({
      resource: item.refTable,
      filters: [
        {
          field: "id",
          operator: "eq",
          value: item.refID,
        },
      ],
    })
  );

  return (
    <div>
      {results.map((result, index) => (
        <div key={index}>
          <h2>{inputArray[index].refTable}</h2>
          {result.isLoading ? (
            <p>Loading...</p>
          ) : result.isError ? (
            <p>Error: {result.error?.message}</p>
          ) : (
            <pre>{JSON.stringify(result.data, null, 2)}</pre>
          )}
        </div>
      ))}
    </div>
  );
};

In this corrected version, we're using useList instead of useMany. The useList hook allows us to fetch data with filters, which we use to filter by the refID. You can use this component in your parent component like this:

const YourParentComponent = () => {
  const inputArray = [
    { refTable: "Pokemon", refID: "id1" },
    { refTable: "Animals", refID: "id2" },
  ];

  return <DynamicFetchComponent inputArray={inputArray} />;
};

const YourParentComponent = () => {
  const inputArray = [
    { refTable: "Pokemon", refID: "id1" },
    { refTable: "Animals", refID: "id2" },
  ];

  return <DynamicFetchComponent inputArray={inputArray} />;
};

This approach uses useList multiple times, once for each item in your input array, which aligns with your "useManyLists" concept. For more details on how to use the useList hook, including its filtering capabilities, you can refer to the useList documentation. Remember that this approach will still create multiple network requests, one for each item in your input array. If performance becomes an issue with large arrays, you might need to consider alternative approaches or backend optimizations. ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•3w ago

<@1298702566271484007> Kapa.ai is still learning and improving, please let me know how I did by reacting below.

eastern-cyanOP•3w ago

@kapa.ai you are still using the useList inside the map callback

kapa.ai•3w ago

Let me check the knowledge base for you again. One moment! :books: ---------------------- I apologize for the oversight. You are absolutely correct, and I thank you for pointing that out. Using hooks inside a map callback is indeed not correct React usage. Let's rectify this approach to properly use multiple useList hooks without violating React's rules of hooks. Here's a corrected version that avoids using hooks inside callbacks:

import React from "react";
import { useList } from "@refinedev/core";

interface InputItem {
  refTable: string;
  refID: string;
}

const DynamicFetchComponent: React.FC<{ inputArray: InputItem[] }> = ({ inputArray }) => {
  // Use separate useList calls for each item
  const result1 = useList({
    resource: inputArray[0]?.refTable || "",
    filters: [{ field: "id", operator: "eq", value: inputArray[0]?.refID }],
  });

  const result2 = useList({
    resource: inputArray[1]?.refTable || "",
    filters: [{ field: "id", operator: "eq", value: inputArray[1]?.refID }],
  });

  // Add more useList calls as needed for additional items

  const results = [result1, result2]; // Add more results as needed

  return (
    <div>
      {results.map((result, index) => (
        <div key={index}>
          <h2>{inputArray[index]?.refTable}</h2>
          {result.isLoading ? (
            <p>Loading...</p>
          ) : result.isError ? (
            <p>Error: {result.error?.message}</p>
          ) : (
            <pre>{JSON.stringify(result.data, null, 2)}</pre>
          )}
        </div>
      ))}
    </div>
  );
};

import React from "react";
import { useList } from "@refinedev/core";

interface InputItem {
  refTable: string;
  refID: string;
}

const DynamicFetchComponent: React.FC<{ inputArray: InputItem[] }> = ({ inputArray }) => {
  // Use separate useList calls for each item
  const result1 = useList({
    resource: inputArray[0]?.refTable || "",
    filters: [{ field: "id", operator: "eq", value: inputArray[0]?.refID }],
  });

  const result2 = useList({
    resource: inputArray[1]?.refTable || "",
    filters: [{ field: "id", operator: "eq", value: inputArray[1]?.refID }],
  });

  // Add more useList calls as needed for additional items

  const results = [result1, result2]; // Add more results as needed

  return (
    <div>
      {results.map((result, index) => (
        <div key={index}>
          <h2>{inputArray[index]?.refTable}</h2>
          {result.isLoading ? (
            <p>Loading...</p>
          ) : result.isError ? (
            <p>Error: {result.error?.message}</p>
          ) : (
            <pre>{JSON.stringify(result.data, null, 2)}</pre>
          )}
        </div>
      ))}
    </div>
  );
};

In this corrected version, we're calling useList separately for each item in the input array. This approach adheres to React's rules of hooks by calling hooks at the top level of the component. However, this solution is not dynamic and is limited to a fixed number of items in the input array. If you need to handle a truly dynamic number of items, you might need to consider a different approach, such as: 1. Using a custom hook that takes the input array and returns an array of results. 2. Using the useList hook with a resource that can handle multiple tables and IDs in a single request (this would require backend support). For more information on how to use the useList hook and its capabilities, you can refer to the useList documentation. I apologize again for the confusion in my previous responses. Thank you for your patience and for helping me provide a more accurate answer. ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•3w ago

<@1298702566271484007> Kapa.ai is still learning and improving, please let me know how I did by reacting below.

How do I useManyLists?

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