Display Message onLogin Failed

Hi, How can i know if useLogin failed in order to display a message to the user

2 Replies

Hi @Tanmirt. I'm kapa.ai, your friendly support bot. I will try to answer your question by searching through the knowledge base. :wave: ---------------------- To display a message to the user when useLogin fails, you can handle the success value in the response from the login method. The useLogin hook from refine always returns a resolved promise, so you need to check the success property to determine if the login was successful or not. Here is an example of how you can achieve this: 1. Import the useLogin hook from @refinedev/core. 2. Use the mutate function from useLogin to call the login method. 3. Check the success property in the onSuccess callback to determine if the login failed and display an appropriate message. Here is a code example:

import { useLogin } from "@refinedev/core";

const LoginPage = () => {
  const { mutate: login } = useLogin();

  const onLogin = () => {
    login(
      { email: "refine@example.com", password: "refine" },
      {
        onSuccess: (data) => {
          if (!data.success) {
            // Display error message to the user
            alert(data.error ? data.error.message : "Login failed");
          } else {
            // Handle successful login
            console.log("Login successful");
          }
        },
      }
    );
  };

  return <button onClick={onLogin}>Login</button>;
};

import { useLogin } from "@refinedev/core";

const LoginPage = () => {
  const { mutate: login } = useLogin();

  const onLogin = () => {
    login(
      { email: "refine@example.com", password: "refine" },
      {
        onSuccess: (data) => {
          if (!data.success) {
            // Display error message to the user
            alert(data.error ? data.error.message : "Login failed");
          } else {
            // Handle successful login
            console.log("Login successful");
          }
        },
      }
    );
  };

  return <button onClick={onLogin}>Login</button>;
};

In this example, if the login fails (data.success is false), an alert is shown with the error message. If the error object is not provided, a generic "Login failed" message is displayed. For more details, you can refer to the useLogin documentation (https://refine.dev/docs/authentication/hooks/use-login/#error-handling). If you need to customize the error message returned by the login method, you can do so by resolving the promise with an error object that has name and message properties. Here is an example of how to customize the error message in the authProvider:

import { AuthProvider } from "@refinedev/core";

const authProvider: AuthProvider = {
  login: async ({ email, password }) => {
    // Custom login logic
    return {
      success: false,
      error: {
        name: "Login Failed!",
        message: "The email or password that you've entered doesn't match any account.",
      },
    };
  },
  // Other methods...
};

import { AuthProvider } from "@refinedev/core";

const authProvider: AuthProvider = {
  login: async ({ email, password }) => {
    // Custom login logic
    return {
      success: false,
      error: {
        name: "Login Failed!",
        message: "The email or password that you've entered doesn't match any account.",
      },
    };
  },
  // Other methods...
};

For more information on customizing the error message, you can refer to the authProvider documentation (https://refine.dev/docs/authentication/auth-provider/#login). ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•4w ago

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