29 Replies
Hi @florent. I'm kapa.ai, your friendly support bot. I will try to answer your question by searching through the knowledge base. :wave:
----------------------
I'm sorry, but the provided knowledge sources do not contain information on how to refresh data periodically in Refine. However, you can consider using a state management library or React's built-in hooks to manage state and trigger re-renders when your data changes.
For more detailed information, you can refer to the official Refine documentation (https://refine.dev/docs/getting-started/introduction).
----------------------
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flat-fuchsiaOP•11mo ago
@kapa.ai
Can I query the data again using interval here?
Let me check the knowledge base for you. One moment! :books:
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The
getServerSideProps
function in Next.js is a server-side rendering function that runs at build time in production. It won't be able to set an interval to fetch data periodically because it's not running in the browser.
If you want to fetch data periodically, you should do it on the client-side, in a React component, using hooks like useEffect
. However, please note that this is not a recommended practice as it can lead to unnecessary requests and load on your server.
Instead, consider using a real-time data fetching library or use a state management library like React Query or SWR that supports background updates and caching.
For more information, you can refer to the Refine documentation (https://refine.dev/docs/getting-started/introduction) and the React Query guide (https://refine.dev/blog/react-query-guide).
----------------------
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flat-fuchsiaOP•11mo ago
@kapa.ai
Can I learn to SWR?
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Yes, you can definitely learn to use SWR. It's a powerful client-side data fetching library used in modern web applications. It's particularly useful in React-based applications and comes with features like automatic revalidation, focus tracking, and error retries.
Here are some steps to get started with SWR:
1. Understand the basics of JavaScript and React, as SWR is a library for use with React and its frameworks. Make sure you have Node (https://nodejs.org/) installed on your computer.
2. Create a new React project with
create-react-app
:
or with Yarn:
3. Install the necessary packages for your application. In this case, you would need styled-components
and swr
:
or with Yarn:
4. Start learning how to fetch data with SWR and compare it with other data fetching methods like the native 'Fetch() API' or Axios.
5. Explore additional features of SWR like TypeScript support and developer tools for debugging and writing your code more efficiently.
You can find more detailed information and a step-by-step guide in this blog post (https://refine.dev/blog/data-fetching-next-js-useswr).
----------------------
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flat-fuchsiaOP•11mo ago
How to apply useSWR in this code?
@kapa.ai export default function PointList() {
type PointDetail = IPointDetailItem[] | ''
const [pointDetail, setPointDetail] = useState<PointDetail>('')
const [open, setOpen] = React.useState(false)
const [startValue, setStartValue] = React.useState<Dayjs | null>(null)
const [endValue, setEndValue] = React.useState<Dayjs | null>(null)
const handleClose = () => setOpen(false)
const handleOpen = (pointDetail: PointDetail) => {
setPointDetail(pointDetail)
setOpen(true)
}
const { dataGridProps, search, filters } = useDataGrid<BaseRecord, HttpError, IPointsFilterVariables>({
pagination: {
mode: 'server',
},
initialPageSize: 10,
onSearch: (params) => {
const filters: CrudFilters = []
const { q, points } = params
filters.push({
field: 'q',
operator: 'eq',
value: q !== '' ? q : undefined,
})
filters.push({
field: 'points',
operator: 'eq',
value: q !== '' ? q : undefined,
})
filters.push(
{
field: 'order_date',
operator: 'gte',
value: startValue ? dayjs(startValue).format('YYYY-MM-DD 00:00:00') : undefined,
},
{
field: 'order_date',
operator: 'lte',
value: endValue ? dayjs(endValue).format('YYYY-MM-DD 23:59:59') : undefined,
},
)
return filters
},
})
How to apply useSWR in this code?
Let me check the knowledge base for you. One moment! :books:
----------------------
To apply
useSWR
in your code, you would need to replace the data fetching logic with a useSWR
hook. However, the provided code and knowledge sources do not contain enough information to provide a specific example of how to replace your existing data fetching logic with useSWR
.
In general, you would use useSWR
like this:
In this example, '/api/data'
is the key for your data (usually the API endpoint), and fetcher
is a function that returns a Promise with your data. useSWR
will ensure that your component re-renders when the data changes.
For more detailed information on how to use useSWR
, you can refer to the SWR documentation (https://swr.vercel.app/docs/getting-started).
----------------------
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flat-fuchsiaOP•11mo ago
@kapa.ai how to writing a fetcher?
Let me check the knowledge base for you. One moment! :books:
----------------------
In your code, you've already written a fetcher function. The fetcher function is a function that fetches data from a given URL and returns a Promise that resolves with the data. Here's how you've defined it:
This fetcher uses the Fetch API to get data from the provided URL, and then it converts the response to JSON.
You're using this fetcher with
useSWR
like this:
In this line, useSWR
is called with two arguments: the key ('/api/data'
) and the fetcher function. The key is a unique identifier for the data (usually the API endpoint), and the fetcher function is responsible for getting the data.
If you want to use the data fetched in getServerSideProps
as the initial data for your SWR hook, you can pass it as initialData
in the options object:
In this case, props.points
should be the data fetched in getServerSideProps
.
For more detailed information on how to use useSWR
, you can refer to the SWR documentation (https://swr.vercel.app/docs/getting-started).
----------------------
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flat-fuchsiaOP•11mo ago
@kapa.ai
I fix this code
but return error this.
"No overload matches this call.
The last overload gave the following error.
Object literal may only specify known properties, and 'initialData' does not exist in type 'SWRConfiguration<any, any, BareFetcher<any>>'.ts(2769)
index.d.ts(200, 5): The last overload is declared here."
Let me check the knowledge base for you. One moment! :books:
----------------------
The error message is indicating that
initialData
is not a recognized property in the configuration object for useSWR
. This is because the initialData
option is not directly supported by useSWR
.
Instead, useSWR
provides a fallbackData
option that you can use to specify initial data. Here's how you can modify your code:
In this case, props.data
should be the data you want to use as the initial data.
For more detailed information on how to use useSWR
, you can refer to the SWR documentation (https://swr.vercel.app/docs/options).
----------------------
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flat-fuchsiaOP•11mo ago
@kapa.ai
When the value is added, swr operates normally. However, it does not change when the value is modified.
Let me check the knowledge base for you. One moment! :books:
----------------------
SWR automatically revalidates data when you navigate back to a page or when you focus on a page. However, it doesn't automatically revalidate data when the data changes on the server.
If you want to revalidate data when a certain event happens (like when data is modified), you can use the
mutate
function from SWR. The mutate
function allows you to trigger a revalidation manually.
Here's a basic example:
In this example, mutate
is used to update the local data instantly and then revalidate it with the server data.
For more detailed information on how to use mutate
with useSWR
, you can refer to the SWR documentation (https://swr.vercel.app/docs/mutation).
----------------------
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flat-fuchsiaOP•11mo ago
@kapa.ai
Can the data be refreshed every 3 seconds?
Let me check the knowledge base for you. One moment! :books:
----------------------
Yes, you can set the
refreshInterval
option in the SWRConfig
to refresh the data every 3 seconds. This option sets the interval (in milliseconds) at which SWR should re-fetch data.
In your code, you've set refreshInterval
to 3000
, which means SWR will re-fetch the data every 3 seconds:
This setting will apply to all useSWR
hooks in your application. If you want to set a different refresh interval for a specific useSWR
hook, you can do so by passing an options object to the hook:
In this example, the data will be refreshed every 5 seconds, regardless of the refreshInterval
set in SWRConfig
.
For more detailed information on how to use refreshInterval
with useSWR
, you can refer to the SWR documentation (https://swr.vercel.app/docs/options#refreshinterval).
----------------------
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flat-fuchsiaOP•11mo ago
@kapa.ai
I am receiving data through datagrid. How do I change this to data received from swr?
Let me check the knowledge base for you. One moment! :books:
----------------------
To use the data received from SWR in your
useDataGrid
hook, you can pass the data from SWR as the initialData
option in useDataGrid
. However, please note that the useDataGrid
hook from Refine does not directly support an initialData
option.
Refine's useDataGrid
hook is designed to work with Refine's data provider system, which abstracts the data fetching process and provides a unified interface for different backends. It's not directly compatible with SWR's data fetching model.
If you want to use SWR for data fetching in a Refine application, you would need to create a custom data provider that uses SWR under the hood. This would involve implementing the various methods (like getList
, getOne
, create
, update
, etc.) using SWR's useSWR
or mutate
functions.
Here's a very basic example of what a custom data provider using SWR might look like:
Then, you can use this data provider in your Refine application:
Please note that this is a simplified example and a real implementation would need to handle parameters, errors, and other aspects properly.
For more information on how to create a custom data provider in Refine, you can refer to the Refine documentation (https://refine.dev/docs/data/data-provider#how-can-i-customize-existing-data-providers).
----------------------
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flat-fuchsiaOP•11mo ago
@kapa.ai
dataProvider this. How to fix?
Let me check the knowledge base for you. One moment! :books:
----------------------
The
useSWR
hook cannot be used inside a data provider function because useSWR
is a React hook and must follow the Rules of Hooks (https://reactjs.org/docs/hooks-rules.html). Hooks can only be called inside the body of a function component or a custom hook.
In your case, you're trying to use useSWR
inside the getList
method of your data provider, which is not a component or a custom hook. This is why you're getting an error.
Instead of using useSWR
inside your data provider, you should continue using the httpClient
(axios instance) to make HTTP requests as you're currently doing. The useSWR
hook is meant to be used inside your components to fetch data and automatically update your UI when the data changes.
Here's how you can modify your getList
method to use axios:
In this code, httpClient[requestMethod]
is used to make the HTTP request, and the response is returned as the result of the getList
method. This is the correct way to implement a data provider in Refine.
----------------------
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