Dynamic variable useSubscription
Hi, I have a problem, when my sessionChoose variable is updated, it doesn't take effect in the useSubscription, it is considered as undefined, so I can't process what I want, does anyone have any ideas? Here's my code
19 Replies
Hi @realdragonma. 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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Hmm, I don't know enough to give you a confident answer yet. However, you can refer to the useSubscription documentation (https://refine.dev/docs/api-reference/core/hooks/live/useSubscription/) for more information on how to use the hook properly.
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----------------------useSubscription | refine
useSubscription calls the subscribe method from liveProvider when mounted. It is useful when you want to subscribe to a Realtime channel.
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conscious-sapphireOP•2y ago
@kapa.ai the sessionChoose variable is a dynamic variable, it can change value, but this doesn't seem to be taken into account in useSubscription
Let me check the knowledge base for you. One moment! :books:
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It seems that the
useSubscription
hook might not be aware of the changes in the sessionChoose
variable. To make the useSubscription
hook aware of the changes, you can try using the useEffect
hook to manage the subscription based on the sessionChoose
variable.
Here's an example of how you can modify your code:
In this example, we use the useEffect
hook to manage the subscription. When the sessionChoose
variable changes, the effect will run, and the previous subscription will be unsubscribed (if there was one), and a new subscription will be created with the updated sessionChoose
value.
Please note that this is just an example based on the information provided in the extracts. You might need to adjust the code according to your specific use case. For more information on useSubscription
, you can refer to the useSubscription documentation (https://refine.dev/docs/api-reference/core/hooks/live/useSubscription/).
----------------------
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conscious-sapphireOP•2y ago
@kapa.ai it gives me this error : "ESLint: React Hook "useSubscription" cannot be called inside a callback. React Hooks must be called in a React function component or a custom React Hook function.(react-hooks/rules-of-hooks)"
Let me check the knowledge base for you. One moment! :books:
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I apologize for the confusion in my previous response. You're right, hooks cannot be called inside a callback or a conditional statement. Instead, you can use the
useEffect
hook to manage the subscription and pass a dependency array that includes the sessionChoose
variable. Here's an updated example:
In this example, we use the useEffect
hook to manage the subscription. When the sessionChoose
variable changes, the effect will run, and the previous subscription will be unsubscribed (if there was one), and a new subscription will be created with the updated sessionChoose
value.
Please note that this is just an example based on the information provided in the extracts. You might need to adjust the code according to your specific use case. For more information on useSubscription
, you can refer to the useSubscription documentation (https://refine.dev/docs/api-reference/core/hooks/live/useSubscription/).
----------------------
Note: you can ask me a follow up question by @ mentioning me again
:speech_balloon:
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conscious-sapphireOP•2y ago
It doesn"t work
@kapa.ai is there any way to add a dependencies variable to our useSubscription ? We can't put the useSubscription into a useEffect
Let me check the knowledge base for you. One moment! :books:
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I apologize for the confusion in my previous responses. You're right, we cannot put the
useSubscription
hook inside a useEffect
hook. Instead, you can try using the enabled
property of the useSubscription
hook to control the subscription based on the sessionChoose
variable. Here's an example:
In this example, we use the enabled
property to control whether the subscription is active or not. When sessionChoose
is not undefined
, the subscription will be enabled, and the onLiveEvent
callback will be executed. If sessionChoose
is undefined
, the subscription will be disabled.
Please note that this is just an example based on the information provided in the extracts. You might need to adjust the code according to your specific use case. For more information on useSubscription
, you can refer to the useSubscription documentation (https://refine.dev/docs/api-reference/core/hooks/live/useSubscription/).
----------------------
Note: you can ask me a follow up question by @ mentioning me again
:speech_balloon:
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conscious-sapphireOP•2y ago
It works but is there any other way ?
@kapa.ai it works, but how if there are 2 variables
Let me check the knowledge base for you. One moment! :books:
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If you have two variables that you want to use as dependencies for the
useSubscription
hook, you can create a custom hook that wraps the useSubscription
hook and takes the dependencies as arguments. Here's an example:
In your component, you can use the useCustomSubscription
hook and pass the two variables as dependencies:
This custom hook will enable the subscription only when both variable1
and variable2
are not undefined
. The onLiveEvent
callback will be executed when both dependencies are defined.
Please note that this is just an example based on the information provided in the extracts. You might need to adjust the code according to your specific use case. For more information on useSubscription
, you can refer to the useSubscription documentation (https://refine.dev/docs/api-reference/core/hooks/live/useSubscription/).
----------------------
Note: you can ask me a follow up question by @ mentioning me again
:speech_balloon:
----------------------<@214840332943097856> kapa.ai is still learning and improving, please let us how it did by reacting below
conscious-sapphireOP•2y ago
@kapa.ai it doesnt work
Let me check the knowledge base for you. One moment! :books:
@realdragonma That's a great question, but unfortunately I am only capable of responding to a maximum of three questions per thread. Don't hesitate to create a new thread for any further questions you have though. I'm here to help!
conscious-sapphireOP•2y ago
Help me please ðŸ˜
@kapa.ai cant you find any other way to look at a state variable in a useSubscription ?
Let me check the knowledge base for you. One moment! :books:
@realdragonma That's a great question, but unfortunately I am only capable of responding to a maximum of three questions per thread. Don't hesitate to create a new thread for any further questions you have though. I'm here to help!