Expo TypeORM EntityMetadataNotFoundError

Question

I'm trying to use typeorm on an expo project through driver expo-sqlite but I've been stuck on to this metadata EntityMetadataNotFoundError: No metadata for "User" was found. error. As far as I've understood this line entities: [User] on config.ts it's connected to the error, searching for it I found some people discussing bad configuration on entities, but they are pointing directly to the filesystem path, and I'm passing through the DataSource the User class. I wrote this code based on This repo and TypeORM strange? example

I've tried this already:

entities: ['./entities/*.entity.ts']

Error stack

[Unhandled promise rejection: EntityMetadataNotFoundError: No metadata for "User" was found.]
at http://192.168.2.2:19000/node_modules/expo/AppEntry.bundle?platform=ios&dev=true&hot=false&strict=false&minify=false:166214:321 in _createSuperInternal
at node_modules/typeorm/browser/error/TypeORMError.js:5:25 in constructor
at http://192.168.2.2:19000/node_modules/expo/AppEntry.bundle?platform=ios&dev=true&hot=false&strict=false&minify=false:167099:321 in _createSuperInternal
at node_modules/typeorm/browser/error/EntityMetadataNotFoundError.js:5:24 in constructor
at node_modules/typeorm/browser/data-source/DataSource.js:281:8 in getMetadata
at node_modules/typeorm/browser/repository/Repository.js:19:19 in get__metadata
at node_modules/typeorm/browser/repository/Repository.js:72:9 in save
at App.tsx:31:18 in wrapper
at App.tsx:25:8 in wrapper
at App.tsx:33:15 in useEffect$argument_0
at node_modules/react-native/Libraries/ReactNative/renderApplication.js:58:4 in renderApplication
at node_modules/react-native/Libraries/ReactNative/AppRegistry.js:117:25 in runnables.appKey.run
at node_modules/react-native/Libraries/ReactNative/AppRegistry.js:202:4 in runApplication

<User.entity.ts>

import { Entity, PrimaryGeneratedColumn, Column, BaseEntity } from "typeorm"

@Entity('user')
export class User extends BaseEntity {

    @PrimaryGeneratedColumn()
    id: number

    @Column()
    firstName: string

    @Column()
    lastName: string

    @Column()
    age: number
}

<config.ts>

import "reflect-metadata"
import * as SQLite from 'expo-sqlite'
import { DataSource, DataSourceOptions } from "typeorm/browser"

import { User } from "./entities/User.entity"


export const AppDataSourceOptions: DataSourceOptions = {
    type: 'expo',
    database: 'zipzop.db',
    driver: SQLite,
    synchronize: true,
    logging: false,
    entities: [User],
    migrations: [],
    subscribers: [],
}


export const AppDataSource = new DataSource(AppDataSourceOptions)

<app.ts>

import React, { useEffect } from 'react';
import { StatusBar } from 'expo-status-bar';
import { SafeAreaProvider } from 'react-native-safe-area-context';

import useCachedResources from './src/hooks/useCachedResources';
import useColorScheme from './src/hooks/useColorScheme';
import Navigation from './src/navigation';


import { AppDataSource } from './src/database/config';
import { User } from './src/database/entities/User.entity'


export default function App(props : any) {
    useEffect(() => {
        if(!AppDataSource.isInitialized){
            AppDataSource.initialize()
            .then(() => console.log("Database initialization SUCESS"))
            .catch((err) => console.log("Database initialization FAILED", err))
            .finally(async () => {
            })
        } else {
            console.log("Database initialization ALREADY")
        }
        async function wrapper() {
            let repository = AppDataSource.getRepository(User)
            let user = new User()
            user.firstName = "Francisco"
            user.lastName = "Pena"
            user.age = 24
            await repository.save(user)
        }
        wrapper()

        async function wrapper2() {
            let repository = AppDataSource.getRepository(User)
            const allUsers = await repository.find()
            console.log(allUsers)
        }
    })


    const isLoadingComplete = useCachedResources();
    const colorScheme = useColorScheme();

    if (!isLoadingComplete) {
        return null;
    } else {
        return (
            <SafeAreaProvider>
            <Navigation colorScheme={colorScheme} />
            <StatusBar />
            </SafeAreaProvider>
            );
    }
}

Repository with the error

Answer 1

I had the same issue, have a look at https://github.com/typeorm/expo-example/pull/5

The expo-example for typeorm has just been updated