adverse-sapphire•5mo ago

Inferencer fail to detect relations

i am making two pages that will have relations between them but antd inferencer fail to detect relations. how to give the right data so realtions can be detected?

9 Replies

kapa.ai•5mo ago

Hi @M Farhan Zachary. I'm kapa.ai, your friendly support bot. I will try to answer your question by searching through the knowledge base. :wave: ---------------------- If the dataProvider and resources in your application work in a way that makes it impossible for Inferencer to find the relation resources, you can manually modify the inferred fields by using the fieldTransformer function. This function allows you to set the relations and resources manually. Here is an example of how you can override the field tags with fieldTransformer:

{
    key: "tags",
    type: "relation",
    relation: true,
    multiple: true,
    resource: { name: "tags", route: "/tags" },
    relationInfer: {
        accessor: "name",
    },
    accessor: "id",
}

{
    key: "tags",
    type: "relation",
    relation: true,
    multiple: true,
    resource: { name: "tags", route: "/tags" },
    relationInfer: {
        accessor: "name",
    },
    accessor: "id",
}

In this example, the key is set to "tags", the type is set to "relation", and the relation is set to true. The resource is set to an object with name and route properties. The relationInfer is set to an object with an accessor property. The accessor is set to "id". If the record's tag array does not have any item, the next records on the list do not get mapped with the accessor key. To solve this, you may need to make some changes to the file while debugging. For more information about modifying the inferred fields, you can refer to the Modifying the inferred fields (https://refine.dev/docs/packages/inferencer#modifying-the-inferred-fields) section in the refine documentation. If you are using multiple data providers, you need to define a default property as well. It's required by refine to handle resources without a specific data providers to fallback to that one. Here's the docs (https://refine.dev/docs/api-reference/core/providers/data-provider/#using-multiple-data-providers) for using multiple data providers. If the inferencer is erroring out, this might be the cause, since it can't find a proper data provider to handle the request, the process is going to fail. If you have different resources for the relations in your data, you can define a resource in the resources array and pass the data provider name in options.dataProviderName. Inferencer will use this config to send the requests for the resource. Please note that Inferencer can only work when there is an API response and scaffolds some boilerplate code. You shouldn't rely on that for building your page, but can be used to get started easier. You can copy the generated code into your page and start from there. source (https://discord.com/channels/837692625737613362/1169979256705654874) ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•5mo ago

<@757407865391808603> kapa.ai is still learning and improving, please let us know how it did by reacting below

adverse-sapphire•5mo ago

but i think i send the right data @kapa.ai , please send me an example how correct data sent from 2 tables that will detect the relations

kapa.ai•5mo ago

Let me check the knowledge base for you. One moment! :books: ---------------------- Sure, I can provide an example of how to handle relational data in Refine. Let's say you have two resources: posts and categories, and each post has a category. You can fetch the categories of the post by using the useMany hook. Here's an example:

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

export const HomePage: React.FC = () => {
    const { tableQueryResult } = useTable<IPost, HttpError>({
        resource: "posts",
    });
    const posts = tableQueryResult?.data?.data ?? [];

    const categoryIds = posts.map((item) => item.category.id);
    const { data: categoriesData, isLoading } = useMany<ICategory>({
        resource: "categories",
        ids: categoryIds,
        queryOptions: {
            enabled: categoryIds.length > 0,
        },
    });

    if (tableQueryResult?.isLoading) {
        return <div>Loading...</div>;
    }
    // Rest of your component
}

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

export const HomePage: React.FC = () => {
    const { tableQueryResult } = useTable<IPost, HttpError>({
        resource: "posts",
    });
    const posts = tableQueryResult?.data?.data ?? [];

    const categoryIds = posts.map((item) => item.category.id);
    const { data: categoriesData, isLoading } = useMany<ICategory>({
        resource: "categories",
        ids: categoryIds,
        queryOptions: {
            enabled: categoryIds.length > 0,
        },
    });

    if (tableQueryResult?.isLoading) {
        return <div>Loading...</div>;
    }
    // Rest of your component
}

In this example, we first use the useTable hook to fetch the posts. Then we extract the category IDs from the posts and use the useMany hook to fetch the categories. The useMany hook is enabled only if there are category IDs. This is how you can handle relational data in Refine. For more information, you can refer to the Refine documentation (https://refine.dev/docs/guides-concepts/tables#relationships-). ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•5mo ago

<@757407865391808603> kapa.ai is still learning and improving, please let us know how it did by reacting below

adverse-sapphire•5mo ago

@kapa.ai @refinedev_inference…js?v=67a757d5:77696 @refinedev/inferencer is trying to detect relations @refinedev_inference…js?v=67a757d5:77766 @refinedev/inferencer may send multiple requests to your API for nonexistent resources when trying to detect relations. To learn more about how the inferencer works, visit https://s.refine.dev/how-inferencer-works @refinedev_inference…js?v=67a757d5:77938 @refinedev/inferencer: Inferencer failed to render this field {key: 'unit_id', relation: {…}} key : "unit_id" relation : {key: '__', fieldable: false, type: 'object', priority: 1} [[Prototype]] : Object

kapa.ai•5mo ago

Let me check the knowledge base for you. One moment! :books: ---------------------- The error message you're seeing indicates that the Inferencer failed to render a field with the key unit_id. This could be due to a variety of reasons, such as the field not existing in the data, or the field not being correctly formatted for the Inferencer to understand. The Inferencer in Refine tries to automatically generate views and codes based on the data structure of the resource. However, it might not always be able to correctly infer the relations between different resources, especially if the data structure is complex or unconventional. In your case, it seems like the unit_id field is being considered as a relation, but the Inferencer is unable to determine the related resource. This could be because the related resource does not exist, or the Inferencer is unable to find it due to the way your data is structured. One way to solve this issue is to manually specify the relations using the fieldTransformer function. This function allows you to customize the output of the Inferencer, such as setting a custom accessor property for object type fields or changing the type of a field, or changing the resource for a relation type. Here's an example of how you can use fieldTransformer:

{{
    key: "unit_id",
    type: "relation",
    relation: true,
    resource: { name: "units", route: "/units" },
    relationInfer: {
        accessor: "name",
    },
    accessor: "id",
}}

{{
    key: "unit_id",
    type: "relation",
    relation: true,
    resource: { name: "units", route: "/units" },
    relationInfer: {
        accessor: "name",
    },
    accessor: "id",
}}

In this example, the key is set to "unit_id", the type is set to "relation", and the relation is set to true. The resource is set to an object with name and route properties. The relationInfer is set to an object with an accessor property. The accessor is set to "id". For more information about how the Inferencer works and how to modify the inferred fields, you can refer to the Refine documentation (https://refine.dev/docs/packages/inferencer#modifying-the-inferred-fields). ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•5mo ago

<@757407865391808603> kapa.ai is still learning and improving, please let us know how it did by reacting below

exotic-emerald•5mo ago

Hello @M Farhan Zachary, I believe https://refine.dev/docs/packages/inferencer/#modifying-the-inferred-fields this is what you looking for