Supabase and Ionic Vue Quickstart Guide

This example provides the steps to build a simple user management app (from scratch!) using Supabase and Ionic Vue.

Rory Wilding

Jun. 25, 22 · Tutorial

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This example provides the steps to build a simple user management app (from scratch!) using Supabase and Ionic Vue. It includes:

Supabase Database: a Postgres database for storing your user data.
Supabase Auth: users can sign in with magic links (no passwords, only email).
Supabase Storage: users can upload a photo.
Row Level Security: data is protected so that individuals can only access their own data.
Instant APIs: APIs will be automatically generated when you create your database tables.

By the end of this guide you'll have an app that allows users to log in and update some basic profile details:

Clicking this button the application will:

Launch and prepare the Postgres database in Supabase.
Launch the app in Vercel.
Fork the example into your own GitHub account.
Prepare the deployed application with all the necessary environment variables.

If you want to do it yourself, let's get started!

GitHub

Whenever you get stuck at any point, take a look at this repo.

Project Setup

Before we start building we're going to set up our Database and API. This is as simple as starting a new Project in Supabase and then creating a "schema" inside the database.

Create a Project

Go to app.supabase.com.
Click on "New Project".
Enter your project details.
Wait for the new database to launch.

Set Up the Database Schema

Now we are going to set up the database schema. We can use the "User Management Starter" quickstart in the SQL Editor, or you can just copy/paste the SQL from below and run it yourself.

     SQL 
   
 
 
   -- Create a table for public "profiles"
create table profiles (
  id uuid references auth.users not null,
  updated_at timestamp with time zone,
  username text unique,
  avatar_url text,
  website text,

  primary key (id),
  unique(username),
  constraint username_length check (char_length(username) >= 3)
);

alter table profiles enable row level security;

create policy "Public profiles are viewable by everyone."
  on profiles for select
  using ( true );

create policy "Users can insert their own profile."
  on profiles for insert
  with check ( auth.uid() = id );

create policy "Users can update own profile."
  on profiles for update
  using ( auth.uid() = id );

-- Set up Realtime!
begin;
  drop publication if exists supabase_realtime;
  create publication supabase_realtime;
commit;
alter publication supabase_realtime add table profiles;

-- Set up Storage!
insert into storage.buckets (id, name)
values ('avatars', 'avatars');

create policy "Avatar images are publicly accessible."
  on storage.objects for select
  using ( bucket_id = 'avatars' );

create policy "Anyone can upload an avatar."
  on storage.objects for insert
  with check ( bucket_id = 'avatars' ); 
  

UI

     Plain Text 
   
Go to the "SQL" section.

Click "User Management Starter".

Click "Run".

Get the API Keys

Now that you've created some database tables, you are ready to insert data using the auto-generated API. We just need to get the URL and anon key from the API settings.

UI

       Plain Text 
     
Go to the "Settings" section.
Click "API" in the sidebar.
Find your API URL in this page.
Find your "anon" and "service_role" keys on this page.

Building the App

Let's start building the Ionic Vue app from scratch.

Initialize an Ionic Vue App

We can use the Ionic CLI to initialize an app called supabase-ionic-vue:

       Shell 
     
     npm install -g @ionic/cli
ionic start supabase-ionic-vue blank --type vue
cd supabase-ionic-vue

Then let's install the only additional dependency: supabase-js

       Shell 
     
     npm install @supabase/supabase-js

And finally, we want to save the environment variables in a .env. All we need are the API URL and the anon key that you copied earlier.

       HTML 
     
     .env

VUE_APP_SUPABASE_URL=YOUR_SUPABASE_URL
VUE_APP_SUPABASE_ANON_KEY=YOUR_SUPABASE_ANON_KEY

Now that we have the API credentials in place, let's create a helper file to initialize the Supabase client. These variables will be exposed on the browser, and that's completely fine since we have Row Level Security enabled on our Database.

       HTML 
     
     src/supabase.ts

import { createClient } from '@supabase/supabase-js';

const supabaseUrl = process.env.VUE_APP_SUPABASE_URL as string;
const supabaseAnonKey = process.env.VUE_APP_SUPABASE_ANON_KEY as string;

export const supabase = createClient(supabaseUrl, supabaseAnonKey);

Set Up a Login Route

Let's set up a Vue component to manage logins and sign ups. We'll use Magic Links, so users can sign in with their email without using passwords.

       HTML 
     
 
 
     /src/views/Login.vue

<template>
  <ion-page>
    <ion-header>
      <ion-toolbar>
        <ion-title>Login</ion-title>
      </ion-toolbar>
    </ion-header>

    <ion-content>
      <div class="ion-padding">
        <h1>Supabase + Ionic Vue</h1>
        <p>Sign in via magic link with your email below</p>
      </div>
      <ion-list inset="true">
        <form @submit.prevent="handleLogin">
          <ion-item>
            <ion-label position="stacked">Email</ion-label>
            <ion-input
              v-model="email"
              name="email"
              autocomplete
              type="email"
            ></ion-input>
          </ion-item>
          <div class="ion-text-center">
            <ion-button type="submit" fill="clear">Login</ion-button>
          </div>
        </form>
      </ion-list>
      <p>{{email}}</p>
    </ion-content>

  </ion-page>
</template>

<script lang="ts">
import { supabase } from '../supabase';
import {
  IonContent,
  IonHeader,
  IonPage,
  IonTitle,
  IonToolbar,
  IonList,
  IonItem,
  IonLabel,
  IonInput,
  IonButton,
  toastController,
  loadingController,
} from '@ionic/vue';
import { defineComponent, ref } from 'vue';

export default defineComponent({
  name: 'LoginPage',
  components: {
    IonContent,
    IonHeader,
    IonPage,
    IonTitle,
    IonToolbar,
    IonList,
    IonItem,
    IonLabel,
    IonInput,
    IonButton,
  },
  setup() {
    const email = ref('');
    const handleLogin = async () => {

      const loader = await loadingController.create({});
      const toast = await toastController.create({ duration: 5000 });

      try {
        await loader.present();
        const { error } = await supabase.auth.signIn({ email: email.value });

        if (error) throw error;

        toast.message = 'Check your email for the login link!';
        await toast.present();

      } catch (error: any) {

        toast.message = error.error_description || error.message;
        await toast.present();

      } finally {

        await loader.dismiss();

      }
    };
    return { handleLogin, email };
  },
});
</script> 
    

Account page

After a user is signed in we can allow them to edit their profile details and manage their account.

Let's create a new component for that called Account.vue.

       HTML 
     
 
 
     src/views/Account.vue

<template>
  <ion-page>
    <ion-header>
      <ion-toolbar>
        <ion-title>Account</ion-title>
      </ion-toolbar>
    </ion-header>

    <ion-content>
      <form @submit.prevent="updateProfile">
        <ion-item>
          <ion-label>
            <p>Email</p>
            <p>{{ session?.user?.email }}</p>
          </ion-label>
        </ion-item>

        <ion-item>
          <ion-label position="stacked">Name</ion-label>
          <ion-input
            type="text"
            name="username"
            v-model="profile.username"
          ></ion-input>
        </ion-item>

        <ion-item>
          <ion-label position="stacked">Website</ion-label>
          <ion-input
            type="url"
            name="website"
            v-model="profile.website"
          ></ion-input>
        </ion-item>
        <div class="ion-text-center">
          <ion-button fill="clear" type="submit">Update Profile</ion-button>
        </div>
      </form>

      <div class="ion-text-center">
        <ion-button fill="clear" @click="signOut">Log Out</ion-button>
      </div>
    </ion-content>
  </ion-page>
</template>

<script lang="ts">
import { store } from '@/store';
import { supabase } from '@/supabase';
import {
  IonContent,
  IonHeader,
  IonPage,
  IonTitle,
  IonToolbar,
  toastController,
  loadingController,
  IonInput,
  IonItem,
  IonButton,
  IonLabel,
} from '@ionic/vue';
import { User } from '@supabase/supabase-js';
import { defineComponent, onMounted, ref } from 'vue';
export default defineComponent({
  name: 'AccountPage',
  components: {
    IonContent,
    IonHeader,
    IonPage,
    IonTitle,
    IonToolbar,
    IonInput,
    IonItem,
    IonButton,
    IonLabel,
  },
  setup() {
    const session = ref(supabase.auth.session());
    const profile = ref({
      username: '',
      website: '',
      avatar_url: '',
    });
    const user = store.user as User;
    async function getProfile() {
      const loader = await loadingController.create({});
      const toast = await toastController.create({ duration: 5000 });
      await loader.present();
      try {
        let { data, error, status } = await supabase
          .from('profiles')
          .select(`username, website, avatar_url`)
          .eq('id', user.id)
          .single();

        if (error && status !== 406) throw error;

        if (data) {
          console.log(data)
          profile.value = {
            username: data.username,
            website: data.website,
            avatar_url: data.avatar_url,
          };
        }
      } catch (error: any) {
        toast.message = error.message;
        await toast.present();
      } finally {
        await loader.dismiss();
      }
    }

    const updateProfile = async () => {
      const loader = await loadingController.create({});
      const toast = await toastController.create({ duration: 5000 });
      try {
        await loader.present();
        const updates = {
          id: user.id,
          ...profile.value,
          updated_at: new Date(),
        };
        //
        let { error } = await supabase.from('profiles').upsert(updates, {
          returning: 'minimal', // Don't return the value after inserting
        });
        //
        if (error) throw error;
      } catch (error: any) {
        toast.message = error.message;
        await toast.present();
      } finally {
        await loader.dismiss();
      }
    };

    async function signOut() {
      const loader = await loadingController.create({});
      const toast = await toastController.create({ duration: 5000 });
      await loader.present();
      try {
        let { error } = await supabase.auth.signOut();
        if (error) throw error;
      } catch (error: any) {
        toast.message = error.message;
        await toast.present();
      } finally {
        await loader.dismiss();
      }
    }

    onMounted(() => {
      getProfile();
    });
    return { signOut, profile, session, updateProfile };
  },
});
</script> 
    

Launch!

Now that we have all the components in place, let's update App.vue and our routes:

       HTML 
     
 
 
     src/router.index.ts

import { createRouter, createWebHistory } from '@ionic/vue-router';
import { RouteRecordRaw } from 'vue-router';
import LoginPage from '../views/Login.vue';
import AccountPage from '../views/Account.vue';
const routes: Array<RouteRecordRaw> = [
  {
    path: '/',
    name: 'Login',
    component: LoginPage
  },
  {
    path: '/account',
    name: 'Account',
    component: AccountPage
  }
]

const router = createRouter({
  history: createWebHistory(process.env.BASE_URL),
  routes
})

export default router 
    

       HTML 
     
 
 
     src/App.vue

<template>
  <ion-app>
    <ion-router-outlet />
  </ion-app>
</template>

<script lang="ts">
import { IonApp, IonRouterOutlet, useIonRouter } from '@ionic/vue';
import { defineComponent } from 'vue';

import { store } from './store';
import { supabase } from './supabase';

export default defineComponent({
  name: 'App',
  components: {
    IonApp,
    IonRouterOutlet
  },
  setup(){
    const router = useIonRouter();
    store.user = supabase.auth.user() ?? {};
    supabase.auth.onAuthStateChange((_, session) => {
      store.user = session?.user ?? {}
      if(session?.user) {
        router.replace('/account');
      }
    })
  }
});
</script> 
    

Once that's done, run this in a terminal window:

       Shell 
     
     ionic serve

And then open the browser to localhost:3000 and you should see the completed app.

Bonus: Profile Photos

Every Supabase project is configured with Storage for managing large files like photos and videos.

Create an Upload Widget

First, install two packages in order to interact with the user's camera.

       Shell 
     
     npm install @ionic/pwa-elements @capacitor/camera

CapacitorJS is a cross-platform native runtime from Ionic that enables web apps to be deployed through the app store and provides access to native device API.

Ionic PWA elements is a companion package that will polyfill certain browser APIs that provide no user interface with custom Ionic UI.

With those packages installed we can update our main.ts to include an additional bootstrapping call for the Ionic PWA Elements.

       HTML 
     
 
 
     import { createApp } from 'vue'
import App from './App.vue'
import router from './router';

import { IonicVue } from '@ionic/vue';
/* Core CSS required for Ionic components to work properly */
import '@ionic/vue/css/ionic.bundle.css';

/* Theme variables */
import './theme/variables.css';

import { defineCustomElements } from '@ionic/pwa-elements/loader';
defineCustomElements(window);
const app = createApp(App)
  .use(IonicVue)
  .use(router);

router.isReady().then(() => {
  app.mount('#app');
}); 
    

Then create an AvatarComponent.

       HTML 
     
 
 
     src/components/Avatar.vue

<template>
  <div class="avatar">
    <div class="avatar_wrapper" @click="uploadAvatar">
      <img v-if="avatarUrl" :src="avatarUrl" />
      <ion-icon v-else name="person" class="no-avatar"></ion-icon>
    </div>
  </div>
</template>

<script lang="ts">
import { ref, toRefs, watch, defineComponent } from 'vue';
import { supabase } from '../supabase';
import { Camera, CameraResultType } from '@capacitor/camera';
import { IonIcon } from '@ionic/vue';
import { person } from 'ionicons/icons';
export default defineComponent({
  name: 'AppAvatar',
  props: { path: String },
  emits: ['upload', 'update:path'],
  components: { IonIcon },
  setup(prop, { emit }) {
    const { path } = toRefs(prop);
    const avatarUrl = ref('');

    const downloadImage = async () => {
      try {
        const { data, error } = await supabase.storage
          .from('avatars')
          .download(path.value);
        if (error) throw error;
        avatarUrl.value = URL.createObjectURL(data!);
      } catch (error: any) {
        console.error('Error downloading image: ', error.message);
      }
    };

    const uploadAvatar = async () => {
      try {
        const photo = await Camera.getPhoto({
          resultType: CameraResultType.DataUrl,
        });
        if (photo.dataUrl) {
          const file = await fetch(photo.dataUrl)
            .then((res) => res.blob())
            .then(
              (blob) =>
                new File([blob], 'my-file', { type: `image/${photo.format}` })
            );

          const fileName = `${Math.random()}-${new Date().getTime()}.${
            photo.format
          }`;
          let { error: uploadError } = await supabase.storage
            .from('avatars')
            .upload(fileName, file);
          if (uploadError) {
            throw uploadError;
          }
          emit('update:path', fileName);
          emit('upload');
        }
      } catch (error) {
        console.log(error);
      }
    };

    watch(path, () => {
      if (path.value) downloadImage();
    });

    return { avatarUrl, uploadAvatar, person };
  },
});
</script>
<style>
.avatar {
  display: block;
  margin: auto;
  min-height: 150px;
}
.avatar .avatar_wrapper {
  margin: 16px auto 16px;
  border-radius: 50%;
  overflow: hidden;
  height: 150px;
  aspect-ratio: 1;
  background: var(--ion-color-step-50);
  border: thick solid var(--ion-color-step-200);
}
.avatar .avatar_wrapper:hover {
  cursor: pointer;
}
.avatar .avatar_wrapper ion-icon.no-avatar {
  width: 100%;
  height: 115%;
}
.avatar img {
  display: block;
  object-fit: cover;
  width: 100%;
  height: 100%;
}
</style> 
    

Add the New Widget

And then we can add the widget to the Account page:

       JavaScript 
     
 
 
     src/views/Account.vue

<template>
  <ion-page>
    <ion-header>
      <ion-toolbar>
        <ion-title>Account</ion-title>
      </ion-toolbar>
    </ion-header>

    <ion-content>
      <avatar v-model:path="profile.avatar_url" @upload="updateProfile"></avatar>
...
</template>
 
    

Next Steps

At this stage, you have a fully functional application!

Got a question? Ask here.
Sign in: app.supabase.com

Database Quickstart guide app Ionic (mobile app framework) Profile (engineering)

Published at DZone with permission of Rory Wilding. See the original article here.

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