Deta Cloud for Flutter

Deta Cloud for Flutter

deta_dart is meant for easy usage of Deta Base, Drive and Auth. All rigths of the beformentioned belong to Deta.

Getting started

Simply import:

import 'package:deta_dart/deta_dart.dart';

and intialize with:

// deta base
DetaBase.instance.init("deta_project_id", "deta_project_key");
// deta drive
DetaDrive.instance.init("deta_project_id", "deta_project_key");

Although it is possible to init as often as you want I recommend to do this once at program start.



There are multiple options to access a Base instance. The simplest version is to use the default methods:

those all expect at least the Deta Base path you want to edit. addItem also expects the object to post for example. The default methods allow flexible path usage but automatically parse your object to fullfill the object format that Deta expects. So there is no need to format those yourself.


await DetaBase.instance.addItem(
        "/stats/items", {"key": "I'm_a_key", "wins": 0, "losses": 0});

There are also generic versions of the default methods provided. In order to use those DetaBase has to additionally be intialized with a map of types and factory functions (btw I'm using the json_serializable package here):

final factories = <Type, Function>{
    UserStats: (json) => UserStats.fromJson(json)


Once that's done you can call the generic versions like the following:

final resp = await DetaBase.instance

which will return an instance of UserStats. If you wonder what UserStats consists of, see here. Following generic methods are available:

For those who want the outmost flexibility there is also a "raw" version of modifying calls:

Those calls can be used if you want to alter the Deta format or if sudden changes of the format are made and this package isn't update soon enough. Though keep in mind that you have to fullfill all Deta format requirements.


await DetaBase.instance.addRawItem(
        "/stats/items", {"items": {"key": "I'm_a_key", "wins": 0, "losses": 0}});

Finally for the shy ones there are "safe" calls available:

Those calls make sure that:

  1. The Deta URL structure is fullfilled
  2. The Deta object structure is fullfilled

To use them you just have to provide your Deta Base name (name only; no slashes) and the object / key (depending on the call).


await DetaBase.instance.addItemSafe(
        "stats", {"key": "I'm_a_key", "wins": 0, "losses": 0});


The Deta Drive api is built for easy usage and error reduction. E.g. Deta only allows uploads of files smaller than 10MB with their direct upload call. In order to fullfill this requirement the uploadSmallFile method throws an error once the file exceeds 10MB. On the other hand, if you use the chunkedUpload method, a file that is smaller than 5MB (which is the minimal size for a chunk) automatically switches to the uploadSmallFile method. It also warns you btw, indicating that you probably should add a size check before calling the method.
Long story short, after intialization following methods are available:

uploadSmallFile should be used for files that are smaller than 10MB, it throws an ArgumentError exception if the file is larger than that.

chunkedUpload is meant for files larger than 10MB as mentioned before this method is a Stream. So you can listen for changes and probably display a loading bar. If the file is smaller than 10MB only the result of the uploadSmallFile will be returned otherwise intermediate results are a JSON object of the upload chunked part call response and the last yield is the response of the end chunked upload call.
If something failes during the upload process the chunked upoad will automatically be aborted.

From the remaining calls only listFiles and listFilesStream are special. Both return instances of FileList which is a helper class.
listFilesStream is also a stream, which polls for changes every five seconds. You can change that behavior via the timeOut parameter.

Example (simple CRD):

// upload a file < 10MB
final imgBytes =
        await File.fromUri(Uri.parse("./test/testSrc/Cat03.jpg")).readAsBytes();
final resp =
    await DetaDrive.instance.uploadSmallFile("test", "test.jpg", imgBytes);

// download a file
final img = await DetaDrive.instance.downloadFile("test", "test.jpg");

// delete files -> the name list can contain up to 1000 names
final nameList = ["test.jpg"];
final delResp = await DetaDrive.instance.deleteFiles("test", nameList);

Example (chunked C):

final bytes =
        await File.fromUri(Uri.parse("./test/testSrc/test.pdf")).readAsBytes();
// .last is the last stream response; in this case the response from the end chunked upload call
// if the provided bytes are smaller than 5MB uploadSmallFile will be used instead; also a warning is logged
final resp = await DetaDrive.instance
    .chunkedUpload("test", "test.pdf", bytes)

Use this package as a library

Depend on it

Run this command:

With Flutter:

 $ flutter pub add deta_dart

This will add a line like this to your package's pubspec.yaml (and run an implicit flutter pub get):

  deta_dart: ^1.0.4

Alternatively, your editor might support or flutter pub get. Check the docs for your editor to learn more.

Import it

Now in your Dart code, you can use:

import 'package:deta_dart/deta_dart.dart'; 

Download Details:

Author: liquidiert

Source Code:

#dart #flutter 

What is GEEK

Buddha Community

Deta Cloud for Flutter

Google's Flutter 1.20 stable announced with new features - Navoki

Flutter Google cross-platform UI framework has released a new version 1.20 stable.

Flutter is Google’s UI framework to make apps for Android, iOS, Web, Windows, Mac, Linux, and Fuchsia OS. Since the last 2 years, the flutter Framework has already achieved popularity among mobile developers to develop Android and iOS apps. In the last few releases, Flutter also added the support of making web applications and desktop applications.

Last month they introduced the support of the Linux desktop app that can be distributed through Canonical Snap Store(Snapcraft), this enables the developers to publish there Linux desktop app for their users and publish on Snap Store.  If you want to learn how to Publish Flutter Desktop app in Snap Store that here is the tutorial.

Flutter 1.20 Framework is built on Google’s made Dart programming language that is a cross-platform language providing native performance, new UI widgets, and other more features for the developer usage.

Here are the few key points of this release:

Performance improvements for Flutter and Dart

In this release, they have got multiple performance improvements in the Dart language itself. A new improvement is to reduce the app size in the release versions of the app. Another performance improvement is to reduce junk in the display of app animation by using the warm-up phase.


If your app is junk information during the first run then the Skia Shading Language shader provides for pre-compilation as part of your app’s build. This can speed it up by more than 2x.

Added a better support of mouse cursors for web and desktop flutter app,. Now many widgets will show cursor on top of them or you can specify the type of supported cursor you want.

Autofill for mobile text fields

Autofill was already supported in native applications now its been added to the Flutter SDK. Now prefilled information stored by your OS can be used for autofill in the application. This feature will be available soon on the flutter web.


A new widget for interaction

InteractiveViewer is a new widget design for common interactions in your app like pan, zoom drag and drop for resizing the widget. Informations on this you can check more on this API documentation where you can try this widget on the DartPad. In this release, drag-drop has more features added like you can know precisely where the drop happened and get the position.

Updated Material Slider, RangeSlider, TimePicker, and DatePicker

In this new release, there are many pre-existing widgets that were updated to match the latest material guidelines, these updates include better interaction with Slider and RangeSliderDatePicker with support for date range and time picker with the new style.


New pubspec.yaml format

Other than these widget updates there is some update within the project also like in pubspec.yaml file format. If you are a flutter plugin publisher then your old pubspec.yaml  is no longer supported to publish a plugin as the older format does not specify for which platform plugin you are making. All existing plugin will continue to work with flutter apps but you should make a plugin update as soon as possible.

Preview of embedded Dart DevTools in Visual Studio Code

Visual Studio code flutter extension got an update in this release. You get a preview of new features where you can analyze that Dev tools in your coding workspace. Enable this feature in your vs code by _dart.previewEmbeddedDevTools_setting. Dart DevTools menu you can choose your favorite page embed on your code workspace.

Network tracking

The updated the Dev tools comes with the network page that enables network profiling. You can track the timings and other information like status and content type of your** network calls** within your app. You can also monitor gRPC traffic.

Generate type-safe platform channels for platform interop

Pigeon is a command-line tool that will generate types of safe platform channels without adding additional dependencies. With this instead of manually matching method strings on platform channel and serializing arguments, you can invoke native class and pass nonprimitive data objects by directly calling the Dartmethod.

There is still a long list of updates in the new version of Flutter 1.2 that we cannot cover in this blog. You can get more details you can visit the official site to know more. Also, you can subscribe to the Navoki newsletter to get updates on these features and upcoming new updates and lessons. In upcoming new versions, we might see more new features and improvements.

You can get more free Flutter tutorials you can follow these courses:

#dart #developers #flutter #app developed #dart devtools in visual studio code #firebase local emulator suite in flutter #flutter autofill #flutter date picker #flutter desktop linux app build and publish on snapcraft store #flutter pigeon #flutter range slider #flutter slider #flutter time picker #flutter tutorial #flutter widget #google flutter #linux #navoki #pubspec format #setup flutter desktop on windows

Adaline  Kulas

Adaline Kulas


Multi-cloud Spending: 8 Tips To Lower Cost

A multi-cloud approach is nothing but leveraging two or more cloud platforms for meeting the various business requirements of an enterprise. The multi-cloud IT environment incorporates different clouds from multiple vendors and negates the dependence on a single public cloud service provider. Thus enterprises can choose specific services from multiple public clouds and reap the benefits of each.

Given its affordability and agility, most enterprises opt for a multi-cloud approach in cloud computing now. A 2018 survey on the public cloud services market points out that 81% of the respondents use services from two or more providers. Subsequently, the cloud computing services market has reported incredible growth in recent times. The worldwide public cloud services market is all set to reach $500 billion in the next four years, according to IDC.

By choosing multi-cloud solutions strategically, enterprises can optimize the benefits of cloud computing and aim for some key competitive advantages. They can avoid the lengthy and cumbersome processes involved in buying, installing and testing high-priced systems. The IaaS and PaaS solutions have become a windfall for the enterprise’s budget as it does not incur huge up-front capital expenditure.

However, cost optimization is still a challenge while facilitating a multi-cloud environment and a large number of enterprises end up overpaying with or without realizing it. The below-mentioned tips would help you ensure the money is spent wisely on cloud computing services.

  • Deactivate underused or unattached resources

Most organizations tend to get wrong with simple things which turn out to be the root cause for needless spending and resource wastage. The first step to cost optimization in your cloud strategy is to identify underutilized resources that you have been paying for.

Enterprises often continue to pay for resources that have been purchased earlier but are no longer useful. Identifying such unused and unattached resources and deactivating it on a regular basis brings you one step closer to cost optimization. If needed, you can deploy automated cloud management tools that are largely helpful in providing the analytics needed to optimize the cloud spending and cut costs on an ongoing basis.

  • Figure out idle instances

Another key cost optimization strategy is to identify the idle computing instances and consolidate them into fewer instances. An idle computing instance may require a CPU utilization level of 1-5%, but you may be billed by the service provider for 100% for the same instance.

Every enterprise will have such non-production instances that constitute unnecessary storage space and lead to overpaying. Re-evaluating your resource allocations regularly and removing unnecessary storage may help you save money significantly. Resource allocation is not only a matter of CPU and memory but also it is linked to the storage, network, and various other factors.

  • Deploy monitoring mechanisms

The key to efficient cost reduction in cloud computing technology lies in proactive monitoring. A comprehensive view of the cloud usage helps enterprises to monitor and minimize unnecessary spending. You can make use of various mechanisms for monitoring computing demand.

For instance, you can use a heatmap to understand the highs and lows in computing visually. This heat map indicates the start and stop times which in turn lead to reduced costs. You can also deploy automated tools that help organizations to schedule instances to start and stop. By following a heatmap, you can understand whether it is safe to shut down servers on holidays or weekends.

#cloud computing services #all #hybrid cloud #cloud #multi-cloud strategy #cloud spend #multi-cloud spending #multi cloud adoption #why multi cloud #multi cloud trends #multi cloud companies #multi cloud research #multi cloud market

Terry  Tremblay

Terry Tremblay


What is Flutter and why you should learn it?

Flutter is an open-source UI toolkit for mobile developers, so they can use it to build native-looking** Android and iOS** applications from the same code base for both platforms. Flutter is also working to make Flutter apps for Web, PWA (progressive Web-App) and Desktop platform (Windows,macOS,Linux).


Flutter was officially released in December 2018. Since then, it has gone a much stronger flutter community.

There has been much increase in flutter developers, flutter packages, youtube tutorials, blogs, flutter examples apps, official and private events, and more. Flutter is now on top software repos based and trending on GitHub.

Flutter meaning?

What is Flutter? this question comes to many new developer’s mind.


Flutter means flying wings quickly, and lightly but obviously, this doesn’t apply in our SDK.

So Flutter was one of the companies that were acquired by **Google **for around $40 million. That company was based on providing gesture detection and recognition from a standard webcam. But later when the Flutter was going to release in alpha version for developer it’s name was Sky, but since Google already owned Flutter name, so they rename it to Flutter.

Where Flutter is used?

Flutter is used in many startup companies nowadays, and even some MNCs are also adopting Flutter as a mobile development framework. Many top famous companies are using their apps in Flutter. Some of them here are





Reflectly app

Reflectly app

Abbey Road Studios

Abbey Road Studios

and many more other apps. Mobile development companies also adopted Flutter as a service for their clients. Even I was one of them who developed flutter apps as a freelancer and later as an IT company for mobile apps.

Flutter as a service

#dart #flutter #uncategorized #flutter framework #flutter jobs #flutter language #flutter meaning #flutter meaning in hindi #google flutter #how does flutter work #what is flutter

Adaline  Kulas

Adaline Kulas


What are the benefits of cloud migration? Reasons you should migrate

The moving of applications, databases and other business elements from the local server to the cloud server called cloud migration. This article will deal with migration techniques, requirement and the benefits of cloud migration.

In simple terms, moving from local to the public cloud server is called cloud migration. Gartner says 17.5% revenue growth as promised in cloud migration and also has a forecast for 2022 as shown in the following image.

#cloud computing services #cloud migration #all #cloud #cloud migration strategy #enterprise cloud migration strategy #business benefits of cloud migration #key benefits of cloud migration #benefits of cloud migration #types of cloud migration

Punith Raaj


The Ultimate Guide To Tik Tok Clone App With Firebase - Ep 2

The Ultimate Guide To Tik Tok Clone App With Firebase - Ep 2
In this video, I'm going to show you how to make a Cool Tik Tok App a new Instagram using Flutter,firebase and visual studio code.

In this tutorial, you will learn how to Upload a Profile Pic to Firestore Data Storage.

🚀 Nice, clean and modern TikTok Clone #App #UI made in #Flutter⚠️

Starter Project :

► Timestamps 
0:00 Intro 0:20 
Upload Profile Screen 
16:35 Image Picker
20:06 Image Cropper 
24:25 Firestore Data Storage Configuration.

⚠️ IMPORTANT: If you want to learn, I strongly advise you to watch the video at a slow speed and try to follow the code and understand what is done, without having to copy the code, and then download it from GitHub.

► Social Media 

► Previous Episode :
► Playlist:

I hope you liked it, and don't forget to like,comment, subscribe, share this video with your friends, and star the repository on GitHub!
⭐️ Thanks for watching the video and for more updates don't forget to click on the notification. 
⭐️Please comment your suggestion for my improvement. 
⭐️Remember to like, subscribe, share this video, and star the repo on Github :)

Hope you enjoyed this video!
If you loved it, you can Buy me a coffee :

LIKE & SHARE & ACTIVATE THE BELL Thanks For Watching :-)

#flutter tutorial - tiktok clone with firebase #flutter challenge @tiktokclone #fluttertutorial firebase #flutter firebase #flutter pageview #morioh #flutter