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?
11 Replies
Hi @chachi. I'm kapa.ai, your friendly support bot. I will try to answer your question by searching through the knowledge base. :wave:
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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:
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).
----------------------
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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?
Let me check the knowledge base for you. One moment! :books:
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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:
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).
----------------------
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extended-salmon•2mo ago
@kapa.ai this did not work
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:
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).
----------------------
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extended-salmon•2mo ago
@kapa.ai is this best practice?
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
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:
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