rival-black
rival-black4mo ago

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
kapa.ai
kapa.ai4mo ago
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:
import { DataProvider, BaseRecord, CreateParams, CreateResponse, UpdateParams, UpdateResponse } from "@refinedev/core";

interface CreateLeadPayload {
// Define the structure of CreateLeadPayload here
name: string;
email: string;
}

const customDataProvider: DataProvider = {
getList: async (params) => {
// Implementation of getList
},
getOne: async (params) => {
// Implementation of getOne
},
create: async <TData extends BaseRecord = BaseRecord, TVariables extends CreateLeadPayload = CreateLeadPayload>(
params: CreateParams<TVariables>
): Promise<CreateResponse<TData>> => {
// Implementation of create
},
update: async <TData extends BaseRecord = BaseRecord, TVariables extends CreateLeadPayload = CreateLeadPayload>(
params: UpdateParams<TVariables>
): Promise<UpdateResponse<TData>> => {
// Implementation of update
},
// Other methods...
};
import { DataProvider, BaseRecord, CreateParams, CreateResponse, UpdateParams, UpdateResponse } from "@refinedev/core";

interface CreateLeadPayload {
// Define the structure of CreateLeadPayload here
name: string;
email: string;
}

const customDataProvider: DataProvider = {
getList: async (params) => {
// Implementation of getList
},
getOne: async (params) => {
// Implementation of getOne
},
create: async <TData extends BaseRecord = BaseRecord, TVariables extends CreateLeadPayload = CreateLeadPayload>(
params: CreateParams<TVariables>
): Promise<CreateResponse<TData>> => {
// Implementation of create
},
update: async <TData extends BaseRecord = BaseRecord, TVariables extends CreateLeadPayload = CreateLeadPayload>(
params: UpdateParams<TVariables>
): Promise<UpdateResponse<TData>> => {
// Implementation of update
},
// Other methods...
};
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. ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------
kapa.ai
kapa.ai4mo ago
<@1062148619622424576> kapa.ai is still learning and improving, please let us know how it did by reacting below
rival-black
rival-blackOP4mo ago
@kapa.ai getting more errors than before
kapa.ai
kapa.ai4mo ago
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
import { DataProvider, BaseRecord, CreateParams, CreateResponse, UpdateParams, UpdateResponse } from "@refinedev/core";

interface CreateLeadPayload {
name: string;
email: string;
}

const customDataProvider: DataProvider = {
getList: async (params) => {
// Implementation of getList
},
getOne: async (params) => {
// Implementation of getOne
},
create: async <TData extends BaseRecord = BaseRecord, TVariables extends CreateLeadPayload = CreateLeadPayload>(
params: CreateParams<TVariables>
): Promise<CreateResponse<TData>> => {
// Implementation of create
return {
data: {} as TData,
};
},
update: async <TData extends BaseRecord = BaseRecord, TVariables extends CreateLeadPayload = CreateLeadPayload>(
params: UpdateParams<TVariables>
): Promise<UpdateResponse<TData>> => {
// Implementation of update
return {
data: {} as TData,
};
},
// Other methods...
};

export default customDataProvider;
import { DataProvider, BaseRecord, CreateParams, CreateResponse, UpdateParams, UpdateResponse } from "@refinedev/core";

interface CreateLeadPayload {
name: string;
email: string;
}

const customDataProvider: DataProvider = {
getList: async (params) => {
// Implementation of getList
},
getOne: async (params) => {
// Implementation of getOne
},
create: async <TData extends BaseRecord = BaseRecord, TVariables extends CreateLeadPayload = CreateLeadPayload>(
params: CreateParams<TVariables>
): Promise<CreateResponse<TData>> => {
// Implementation of create
return {
data: {} as TData,
};
},
update: async <TData extends BaseRecord = BaseRecord, TVariables extends CreateLeadPayload = CreateLeadPayload>(
params: UpdateParams<TVariables>
): Promise<UpdateResponse<TData>> => {
// Implementation of update
return {
data: {} as TData,
};
},
// Other methods...
};

export default customDataProvider;
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: ----------------------
kapa.ai
kapa.ai4mo ago
<@1062148619622424576> kapa.ai is still learning and improving, please let us know how it did by reacting below

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