extended-salmon•2mo ago

Return nothing

If I don't want to return anything in the case when getBusiness().id returns null in the permanent filter, how would I achieve that?

export const DiscountList = ({ children }: React.PropsWithChildren) => {
  useDocumentTitle('Discounts - Applausio');
  const go = useGo();
  const { tableProps, filters } = useTable({
    resource: 'discounts',
    onSearch: (values: any) => {
      return [
        {
          field: 'name',
          operator: 'contains',
          value: values.name,
        },
      ];
    },
    pagination: {
      pageSize: 20,
    },
    sorters: {
      initial: [
        {
          field: 'created',
          order: 'desc',
        },
      ],
    },
    filters: {
      permanent: [
        {
          field: 'business.id',
          operator: 'eq',
          value: getBusiness().id,
        },
      ],
      initial: [
        {
          field: 'name',
          operator: 'contains',
          value: undefined,
        },
      ],
    },
    meta: {
      gqlQuery: DISCOUNTS_QUERY,
    },
  });

export const DiscountList = ({ children }: React.PropsWithChildren) => {
  useDocumentTitle('Discounts - Applausio');
  const go = useGo();
  const { tableProps, filters } = useTable({
    resource: 'discounts',
    onSearch: (values: any) => {
      return [
        {
          field: 'name',
          operator: 'contains',
          value: values.name,
        },
      ];
    },
    pagination: {
      pageSize: 20,
    },
    sorters: {
      initial: [
        {
          field: 'created',
          order: 'desc',
        },
      ],
    },
    filters: {
      permanent: [
        {
          field: 'business.id',
          operator: 'eq',
          value: getBusiness().id,
        },
      ],
      initial: [
        {
          field: 'name',
          operator: 'contains',
          value: undefined,
        },
      ],
    },
    meta: {
      gqlQuery: DISCOUNTS_QUERY,
    },
  });

11 Replies

kapa.ai•2mo ago

Hi @chachi. I'm kapa.ai, your friendly support bot. I will try to answer your question by searching through the knowledge base. :wave: ---------------------- To achieve the functionality where nothing is returned if getBusiness().id is null, you can use conditional rendering in React. If getBusiness().id is null, you can return null from your component, which will render nothing. Here is how you can modify your DiscountList component to include this conditional rendering:

export const DiscountList = ({ children }: React.PropsWithChildren) => {
  useDocumentTitle('Discounts - Applausio');
  const go = useGo();
  const businessId = getBusiness().id;

  if (!businessId) {
    return null;
  }

  const { tableProps, filters } = useTable({
    resource: 'discounts',
    onSearch: (values: any) => {
      return [
        {
          field: 'name',
          operator: 'contains',
          value: values.name,
        },
      ];
    },
    pagination: {
      pageSize: 20,
    },
    sorters: {
      initial: [
        {
          field: 'created',
          order: 'desc',
        },
      ],
    },
    filters: {
      permanent: [
        {
          field: 'business.id',
          operator: 'eq',
          value: businessId,
        },
      ],
      initial: [
        {
          field: 'name',
          operator: 'contains',
          value: undefined,
        },
      ],
    },
    meta: {
      gqlQuery: DISCOUNTS_QUERY,
    },
  });

  return (
    // Your component JSX here
  );
};

export const DiscountList = ({ children }: React.PropsWithChildren) => {
  useDocumentTitle('Discounts - Applausio');
  const go = useGo();
  const businessId = getBusiness().id;

  if (!businessId) {
    return null;
  }

  const { tableProps, filters } = useTable({
    resource: 'discounts',
    onSearch: (values: any) => {
      return [
        {
          field: 'name',
          operator: 'contains',
          value: values.name,
        },
      ];
    },
    pagination: {
      pageSize: 20,
    },
    sorters: {
      initial: [
        {
          field: 'created',
          order: 'desc',
        },
      ],
    },
    filters: {
      permanent: [
        {
          field: 'business.id',
          operator: 'eq',
          value: businessId,
        },
      ],
      initial: [
        {
          field: 'name',
          operator: 'contains',
          value: undefined,
        },
      ],
    },
    meta: {
      gqlQuery: DISCOUNTS_QUERY,
    },
  });

  return (
    // Your component JSX here
  );
};

In this example, the component checks if businessId is null. If it is, the component returns null, which means nothing will be rendered. If businessId is not null, the component proceeds to use the useTable hook and render the rest of the component. For more information on conditional rendering in React, you can refer to the blog post on conditional rendering (https://refine.dev/blog/react-conditional-rendering/#rendering-nothing-with-null). ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•2mo ago

<@95552725294518272> kapa.ai is still learning and improving, please let us know how it did by reacting below

extended-salmon•2mo ago

@kapa.ai what if I want to render the componenet but don't want to display any data from the useTable hook?

kapa.ai•2mo ago

Let me check the knowledge base for you. One moment! :books: ---------------------- If you want to render the component but avoid displaying any data from the useTable hook when getBusiness().id returns null, you can conditionally set the filters.permanent property to an empty array. This way, the useTable hook will not fetch any data. Here is how you can modify your DiscountList component:

export const DiscountList = ({ children }: React.PropsWithChildren) => {
  useDocumentTitle('Discounts - Applausio');
  const go = useGo();
  const businessId = getBusiness().id;

  const { tableProps, filters } = useTable({
    resource: 'discounts',
    onSearch: (values: any) => {
      return [
        {
          field: 'name',
          operator: 'contains',
          value: values.name,
        },
      ];
    },
    pagination: {
      pageSize: 20,
    },
    sorters: {
      initial: [
        {
          field: 'created',
          order: 'desc',
        },
      ],
    },
    filters: {
      permanent: businessId
        ? [
            {
              field: 'business.id',
              operator: 'eq',
              value: businessId,
            },
          ]
        : [],
      initial: [
        {
          field: 'name',
          operator: 'contains',
          value: undefined,
        },
      ],
    },
    meta: {
      gqlQuery: DISCOUNTS_QUERY,
    },
  });

  return (
    <div>
      {/* Your component JSX here */}
      <Table {...tableProps} />
    </div>
  );
};

export const DiscountList = ({ children }: React.PropsWithChildren) => {
  useDocumentTitle('Discounts - Applausio');
  const go = useGo();
  const businessId = getBusiness().id;

  const { tableProps, filters } = useTable({
    resource: 'discounts',
    onSearch: (values: any) => {
      return [
        {
          field: 'name',
          operator: 'contains',
          value: values.name,
        },
      ];
    },
    pagination: {
      pageSize: 20,
    },
    sorters: {
      initial: [
        {
          field: 'created',
          order: 'desc',
        },
      ],
    },
    filters: {
      permanent: businessId
        ? [
            {
              field: 'business.id',
              operator: 'eq',
              value: businessId,
            },
          ]
        : [],
      initial: [
        {
          field: 'name',
          operator: 'contains',
          value: undefined,
        },
      ],
    },
    meta: {
      gqlQuery: DISCOUNTS_QUERY,
    },
  });

  return (
    <div>
      {/* Your component JSX here */}
      <Table {...tableProps} />
    </div>
  );
};

In this example, the filters.permanent property is conditionally set based on the value of businessId. If businessId is null, filters.permanent is set to an empty array, which effectively prevents any data from being fetched by the useTable hook. The component itself will still render, but the table will not display any data. For more information on the useTable hook and its properties, you can refer to the useTable documentation (https://refine.dev/docs/data/hooks/use-table/#usage). ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•2mo ago

<@95552725294518272> kapa.ai is still learning and improving, please let us know how it did by reacting below

extended-salmon•2mo ago

@kapa.ai this did not work

kapa.ai•2mo ago

Let me check the knowledge base for you. One moment! :books: ---------------------- To ensure that the component renders but does not display any data from the useTable hook when getBusiness().id returns null, you can conditionally set the filters.permanent property to a value that will not match any records. For example, you can set it to a non-existent ID. Here is how you can modify your DiscountList component:

export const DiscountList = ({ children }: React.PropsWithChildren) => {
  useDocumentTitle('Discounts - Applausio');
  const go = useGo();
  const businessId = getBusiness().id;

  const { tableProps, filters } = useTable({
    resource: 'discounts',
    onSearch: (values: any) => {
      return [
        {
          field: 'name',
          operator: 'contains',
          value: values.name,
        },
      ];
    },
    pagination: {
      pageSize: 20,
    },
    sorters: {
      initial: [
        {
          field: 'created',
          order: 'desc',
        },
      ],
    },
    filters: {
      permanent: [
        {
          field: 'business.id',
          operator: 'eq',
          value: businessId || 'non-existent-id', // Use a non-existent ID if businessId is null
        },
      ],
      initial: [
        {
          field: 'name',
          operator: 'contains',
          value: undefined,
        },
      ],
    },
    meta: {
      gqlQuery: DISCOUNTS_QUERY,
    },
  });

  return (
    <div>
      {/* Your component JSX here */}
      <Table {...tableProps} />
    </div>
  );
};

export const DiscountList = ({ children }: React.PropsWithChildren) => {
  useDocumentTitle('Discounts - Applausio');
  const go = useGo();
  const businessId = getBusiness().id;

  const { tableProps, filters } = useTable({
    resource: 'discounts',
    onSearch: (values: any) => {
      return [
        {
          field: 'name',
          operator: 'contains',
          value: values.name,
        },
      ];
    },
    pagination: {
      pageSize: 20,
    },
    sorters: {
      initial: [
        {
          field: 'created',
          order: 'desc',
        },
      ],
    },
    filters: {
      permanent: [
        {
          field: 'business.id',
          operator: 'eq',
          value: businessId || 'non-existent-id', // Use a non-existent ID if businessId is null
        },
      ],
      initial: [
        {
          field: 'name',
          operator: 'contains',
          value: undefined,
        },
      ],
    },
    meta: {
      gqlQuery: DISCOUNTS_QUERY,
    },
  });

  return (
    <div>
      {/* Your component JSX here */}
      <Table {...tableProps} />
    </div>
  );
};

In this example, if businessId is null, the filters.permanent property is set to a non-existent ID ('non-existent-id'). This ensures that no records will match the filter, and thus no data will be displayed in the table. The component itself will still render. For more information on the useTable hook and its properties, you can refer to the useTable documentation (https://refine.dev/docs/data/hooks/use-table/#usage). ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•2mo ago

<@95552725294518272> kapa.ai is still learning and improving, please let us know how it did by reacting below

extended-salmon•2mo ago

@kapa.ai is this best practice?

kapa.ai•2mo ago

Let me check the knowledge base for you. One moment! :books: ---------------------- Using a non-existent ID to ensure no data is fetched is a workaround rather than a best practice. A more robust approach would be to conditionally configure the useTable hook or handle the data rendering logic based on the presence of businessId. Here is a more refined approach: 1. Conditional Configuration of useTable Hook: Only configure the useTable hook if businessId is available. 2. Conditional Data Rendering: Render the table only if data is available. Example Implementation

export const DiscountList = ({ children }: React.PropsWithChildren) => {
  useDocumentTitle('Discounts - Applausio');
  const go = useGo();
  const businessId = getBusiness().id;

  const tableConfig = businessId
    ? {
        resource: 'discounts',
        onSearch: (values: any) => [
          {
            field: 'name',
            operator: 'contains',
            value: values.name,
          },
        ],
        pagination: {
          pageSize: 20,
        },
        sorters: {
          initial: [
            {
              field: 'created',
              order: 'desc',
            },
          ],
        },
        filters: {
          permanent: [
            {
              field: 'business.id',
              operator: 'eq',
              value: businessId,
            },
          ],
          initial: [
            {
              field: 'name',
              operator: 'contains',
              value: undefined,
            },
          ],
        },
        meta: {
          gqlQuery: DISCOUNTS_QUERY,
        },
      }
    : null;

  const { tableProps, filters } = useTable(tableConfig);

  return (
    <div>
      {/* Your component JSX here */}
      {businessId ? <Table {...tableProps} /> : <p>No data available</p>}
    </div>
  );
};

export const DiscountList = ({ children }: React.PropsWithChildren) => {
  useDocumentTitle('Discounts - Applausio');
  const go = useGo();
  const businessId = getBusiness().id;

  const tableConfig = businessId
    ? {
        resource: 'discounts',
        onSearch: (values: any) => [
          {
            field: 'name',
            operator: 'contains',
            value: values.name,
          },
        ],
        pagination: {
          pageSize: 20,
        },
        sorters: {
          initial: [
            {
              field: 'created',
              order: 'desc',
            },
          ],
        },
        filters: {
          permanent: [
            {
              field: 'business.id',
              operator: 'eq',
              value: businessId,
            },
          ],
          initial: [
            {
              field: 'name',
              operator: 'contains',
              value: undefined,
            },
          ],
        },
        meta: {
          gqlQuery: DISCOUNTS_QUERY,
        },
      }
    : null;

  const { tableProps, filters } = useTable(tableConfig);

  return (
    <div>
      {/* Your component JSX here */}
      {businessId ? <Table {...tableProps} /> : <p>No data available</p>}
    </div>
  );
};

Explanation - Conditional Configuration: The useTable hook is only configured if businessId is available. This prevents unnecessary data fetching. - Conditional Data Rendering: The table is only rendered if businessId is present. Otherwise, a message indicating no data is available is shown. This approach ensures that your component logic is clear and maintainable, adhering to best practices. For more information on the useTable hook and its properties, you can refer to the useTable documentation (https://refine.dev/docs/data/hooks/use-table/#usage). ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•2mo ago

<@95552725294518272> kapa.ai is still learning and improving, please let us know how it did by reacting below