Custom dataProvider create and update Tvariables constrained specific type error
I am getting this error in my custom dataProvider with the create and update methods.
How can get around it
Errors
Type '<TData extends BaseRecord = BaseRecord, TVariables extends CreateLeadPayload = CreateLeadPayload>(params: CreateParams<TVariables>) => Promise<CreateResponse<TData>>' is not assignable to type '<TData extends BaseRecord = BaseRecord, TVariables = {}>(params: CreateParams<TVariables>) => Promise<CreateResponse<TData>>'.
Types of parameters 'params' and 'params' are incompatible.
Type 'CreateParams<TVariables>' is not assignable to type 'CreateParams<CreateLeadPayload>'.
Type 'TVariables' is not assignable to type 'CreateLeadPayload'.ts(2322)
types.d.ts(403, 53): This type parameter might need an
extends CreateLeadPayload
constraint.
types.d.ts(403, 5): The expected type comes from property 'create' which is declared here on type 'CustomDataProvider'
My code.5 Replies
Hi @muthaiga. I'm kapa.ai, your friendly support bot. I will try to answer your question by searching through the knowledge base. :wave:
----------------------
To address the type error you're encountering in your custom
DataProvider
with the create
and update
methods, you need to ensure that the type parameters for TVariables
are correctly constrained. The error suggests that TVariables
should extend CreateLeadPayload
.
Here's how you can define your custom DataProvider
to avoid the type error:
1. Ensure TVariables
extends CreateLeadPayload
: This constraint ensures that the type parameter TVariables
is compatible with CreateLeadPayload
.
2. Define the create
and update
methods with the correct type constraints: Make sure that the type parameters in your method definitions match the expected types.
Here is an example of how you can define your custom DataProvider
:
In this example:
- The create
and update
methods are defined with the type parameters <TData extends BaseRecord = BaseRecord, TVariables extends CreateLeadPayload = CreateLeadPayload>
.
- This ensures that TVariables
is constrained to CreateLeadPayload
, which should resolve the type error.
For more information on how to create and customize data providers, you can refer to the Data Provider documentation (https://refine.dev/docs/data/data-provider/#faq).
If you need further customization or encounter additional issues, you might find the Create Data Provider From Scratch (https://refine.dev/docs/data/data-provider/) and Create Data Provider with Swizzle (https://refine.dev/docs/packages/cli/) sections helpful.
----------------------
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rival-blackOP•4mo ago
@kapa.ai getting more errors than before
Let me check the knowledge base for you. One moment! :books:
----------------------
It seems like the type constraints might be causing more issues. Let's simplify the approach and ensure that the type constraints are correctly applied. Here’s a more detailed example of how to define your custom
DataProvider
with the correct type constraints:
Custom DataProvider Example
Key Points:
1. Type Constraints: Ensure that TVariables
extends CreateLeadPayload
in both create
and update
methods.
2. Return Types: Make sure the return types match the expected CreateResponse
and UpdateResponse
.
Additional Resources:
- Data Provider Documentation (https://refine.dev/docs/data/data-provider/#faq)
- Create Data Provider From Scratch (https://refine.dev/docs/data/data-provider/)
- Create Data Provider with Swizzle (https://refine.dev/docs/packages/cli/)
If you continue to face issues, please provide more details about the specific errors you are encountering, and we can further refine the solution.
----------------------
Note: you can ask me a follow up question by @ mentioning me again :speech_balloon:
----------------------<@1062148619622424576> kapa.ai is still learning and improving, please let us know how it did by reacting below