I am getting an error after trying to use the POST method through postman to register a user. I have created a simple Schema for the register route.

Error:

Error in register: Error: User validation failed: password: Cast to string failed for value "Promise { <pending> }" (type Promise) at path "password"
    at ValidationError.inspect (/Users/*****/authSystem/node_modules/mongoose/lib/error/validation.js:48:26)
    at formatValue (node:internal/util/inspect:782:19)
    at inspect (node:internal/util/inspect:347:10)
    at formatWithOptionsInternal (node:internal/util/inspect:2167:40)
    at formatWithOptions (node:internal/util/inspect:2029:10)
    at console.value (node:internal/console/constructor:324:14)
    at console.log (node:internal/console/constructor:360:61)
    at /Users/harshmishra/Desktop/BackendApp/authSystem/app.js:46:17
    at processTicksAndRejections (node:internal/process/task_queues:96:5) {

  errors: {
    password: CastError: Cast to string failed for value "Promise { <pending> }" (type Promise) at path "password"
        at SchemaString.cast (/Users/*****/authSystem/node_modules/mongoose/lib/schema/string.js:600:11)
        at SchemaString.SchemaType.applySetters (/Users/*****/authSystem/node_modules/mongoose/lib/schematype.js:1189:12)
        at model.$set (/Users/***/authSystem/node_modules/mongoose/lib/document.js:1409:20)
        at model.$set (/Users/*****/authSystem/node_modules/mongoose/lib/document.js:1137:16)
        at model.Document (/Users/****/authSystem/node_modules/mongoose/lib/document.js:162:12)
        at model.Model (/Users/****/authSystem/node_modules/mongoose/lib/model.js:115:12)
        at new model (/Users/*****/authSystem/node_modules/mongoose/lib/model.js:4825:15)
        at /Users*****/authSystem/node_modules/mongoose/lib/model.js:3132:22
        at /Users/*****/authSystem/node_modules/mongoose/lib/model.js:3168:7
        at Array.forEach (<anonymous>) {
      stringValue: '"Promise { <pending> }"',
      messageFormat: undefined,
      kind: 'string',
      value: [Promise],
      path: 'password',
      reason: null,
      valueType: 'Promise'
    }
  },
  _message: 'User validation failed'
}

Schema:

const userSchema = new mongoose.Schema(
  {
    firstName: {
      type: String,
      default: null,
    },
    lastName: {
      type: String,
      default: null,
    },
    email: {
      type: String,
      unique: true,
    },
    password: {
      type: String,
    },
    token: {
      type: String,
    },
  },
);

module.exports = mongoose.model('User', userSchema)

/register:

app.post("/register", async(req, res) => {
    try {
        const { firstName, lastName, email, password } = req.body;
        if (!(firstName && lastName && email && password)) {
          res.status(400).send("All fields are required");
        }
        const existingUser = await User.findOne({ email });

        if (existingUser) {
          res.send(401).send("User already exist");
        }
        const myEncrpytedPass = bcryptjs.hash(password, 10);
        const user = await User.create({
          firstName,
          lastName,
          email: email.toLowerCase(),
          password: myEncrpytedPass,
        });
        const token = jwt.sign(
          {
            user_id: user._id,
            email,
          },
          process.env.SECRET_KEY,
          {
            expiresIn: "4h",
          }
        );
        user.token = token;
        res.status(201).json(user);
    } catch (error) {
        console.log("Error in register:",error)
   }
})

I am not able to figure out what I am doing wrong here? As I have followed the docs of a mongoose but still I am getting the error.

What changes should I make here?

CodePudding user response：

Try adding await before the bcryptjs.hash(). Looks like that function returns a Promise.

const myEncrpytedPass = await bcryptjs.hash(password, 10);

CodePudding user response：

app.post("/register", async(req, res) => {
    try {
        const { firstName, lastName, email, password } = req.body;
        if (!(firstName && lastName && email && password)) {
          res.status(400).send("All fields are required");
        }
        const existingUser = await User.findOne({ email });

        if (existingUser) {
          res.send(401).send("User already exist");
        }
        const myEncrpytedPass = await bcryptjs.hash(password, 10);
        const user = await User.create({
          firstName,
          lastName,
          email: email.toLowerCase(),
          password: myEncrpytedPass,
        });
        const token = await jwt.sign(
          {
            user_id: user._id,
            email,
          },
          process.env.SECRET_KEY,
          {
            expiresIn: "4h",
          }
        );
        user.token = token;
        res.status(201).json(user);
    } catch (error) {
        console.log("Error in register:",error)
   }
})

You need to await jwt sign and bcrypt