fascinating-indigo•2mo ago

How to handle an API that returns data nested in objects?

For example, in the documentation the shape of the categories enddoint is an array of category objects. What if that array is nested inside an object in the response? For example:

{
  "categories": [
    {
    "id": 2,
    "title": "Smartphones & Tablets"
    },
    {
      "id": 3,
      "title": "Audio & Video"
    },
    {
      "id": 4,
      "title": "Gaming"
    },
  ]
}

{
  "categories": [
    {
    "id": 2,
    "title": "Smartphones & Tablets"
    },
    {
      "id": 3,
      "title": "Audio & Video"
    },
    {
      "id": 4,
      "title": "Gaming"
    },
  ]
}

For a hook such as useSelect how can I adjust the shape of the object so that the hook understands how to process it correctly?

9 Replies

kapa.ai•2mo ago

Hi @Nitai. I'm kapa.ai, your friendly support bot. I will try to answer your question by searching through the knowledge base. :wave: ---------------------- To handle an API that returns data nested inside objects, you can manually create the options using the queryResult from the useSelect hook. This approach allows you to map the nested data structure to the format expected by the useSelect hook. Here's how you can adjust the shape of the object so that the useSelect hook understands how to process it correctly: 1. Use the useSelect hook to fetch the data. 2. Access the nested data from the queryResult. 3. Map the nested data to the expected format for the options. Below is an example based on your provided data structure:

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

const MyComponent = () => {
  const { queryResult } = useSelect({
    resource: "categories",
  });

  // Access the nested data
  const options = queryResult.data?.data.categories.map((item) => ({
    label: item.title,
    value: item.id,
  }));

  return (
    <select>
      {options?.map((option) => (
        <option key={option.value} value={option.value}>
          {option.label}
        </option>
      ))}
    </select>
  );
};

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

const MyComponent = () => {
  const { queryResult } = useSelect({
    resource: "categories",
  });

  // Access the nested data
  const options = queryResult.data?.data.categories.map((item) => ({
    label: item.title,
    value: item.id,
  }));

  return (
    <select>
      {options?.map((option) => (
        <option key={option.value} value={option.value}>
          {option.label}
        </option>
      ))}
    </select>
  );
};

In this example: - The useSelect hook fetches the data from the categories resource. - The queryResult contains the response data, which is accessed and mapped to the expected format for the options. - The options array is then used to render the <select> element with the appropriate options. For more information, you can refer to the documentation on creating options manually (https://refine.dev/docs/data/hooks/use-select/#can-i-create-the-options-manually). ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•2mo ago

<@1091820430047838349> kapa.ai is still learning and improving, please let us know how it did by reacting below

fascinating-indigo•2mo ago

@kapa.ai This still results in an error because the defaultQueryOnSuccess callback is called.

kapa.ai•2mo ago

Let me check the knowledge base for you. One moment! :books: ---------------------- To handle the scenario where the defaultQueryOnSuccess callback is called and results in an error, you can customize the defaultValueQueryOptions to handle the nested data structure properly. This involves using the onSuccess callback to process the nested data before it is used by the useSelect hook. Here's how you can adjust the shape of the object and handle the onSuccess callback:

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

const MyComponent = () => {
  const { options } = useSelect({
    resource: "categories",
    defaultValueQueryOptions: {
      onSuccess: (data) => {
        // Process the nested data structure
        const categories = data.data.categories.map((item) => ({
          label: item.title,
          value: item.id,
        }));
        console.log("Processed categories:", categories);
      },
    },
  });

  return (
    <select>
      {options?.map((option) => (
        <option key={option.value} value={option.value}>
          {option.label}
        </option>
      ))}
    </select>
  );
};

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

const MyComponent = () => {
  const { options } = useSelect({
    resource: "categories",
    defaultValueQueryOptions: {
      onSuccess: (data) => {
        // Process the nested data structure
        const categories = data.data.categories.map((item) => ({
          label: item.title,
          value: item.id,
        }));
        console.log("Processed categories:", categories);
      },
    },
  });

  return (
    <select>
      {options?.map((option) => (
        <option key={option.value} value={option.value}>
          {option.label}
        </option>
      ))}
    </select>
  );
};

In this example: - The useSelect hook is configured with defaultValueQueryOptions. - The onSuccess callback processes the nested data structure and maps it to the expected format. - The processed data is logged to the console, and you can use it as needed in your component. For more details, you can refer to the documentation on defaultValueQueryOptions (https://refine.dev/docs/ui-integrations/ant-design/hooks/use-select/#defaultvaluequeryoptions). ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•2mo ago

<@1091820430047838349> kapa.ai is still learning and improving, please let us know how it did by reacting below

kapa.ai•2mo ago

Sorry @Nitai, I seem to be having a bit of trouble. Don't worry though, I've pinged my support and they will try to fix me up! :technologist: Perhaps try again in 15mins?

fascinating-indigo•2mo ago

@kapa.ai That results in a warning stating that defaultValueQueryOptions.onSuccess is deprecated

kapa.ai•2mo ago

Let me check the knowledge base for you. One moment! :books: ---------------------- To handle an API that returns data nested inside objects and avoid using deprecated defaultValueQueryOptions.onSuccess, you can manually process the data after fetching it with the useSelect hook. Here's how you can do it: 1. Use the useSelect hook to fetch the data. 2. Access the nested data from the queryResult. 3. Map the nested data to the expected format for the options. Here's an example:

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

const MyComponent = () => {
  const { queryResult } = useSelect({
    resource: "categories",
  });

  // Access the nested data
  const options = queryResult.data?.data.categories.map((item) => ({
    label: item.title,
    value: item.id,
  }));

  return (
    <select>
      {options?.map((option) => (
        <option key={option.value} value={option.value}>
          {option.label}
        </option>
      ))}
    </select>
  );
};

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

const MyComponent = () => {
  const { queryResult } = useSelect({
    resource: "categories",
  });

  // Access the nested data
  const options = queryResult.data?.data.categories.map((item) => ({
    label: item.title,
    value: item.id,
  }));

  return (
    <select>
      {options?.map((option) => (
        <option key={option.value} value={option.value}>
          {option.label}
        </option>
      ))}
    </select>
  );
};

kapa.ai•2mo ago

<@1091820430047838349> kapa.ai is still learning and improving, please let us know how it did by reacting below