Facebook Game Development - storing items in (which) database? - database

I'd like to develop a small Facebook game with some graphics involved (not that many). Within that game, the users will be able to buy/sell certain items and I wonder WHERE I can save those items/virtual money ...? Does Facebook offer me a database I can use?

You will need to host your own database for your game. Facebook just provides the frontend, it's up to you to manage and run the backend services.

Related

How to choose the right database for lyrics

I am new in mobile app development and I am developing an application in React Native, which will contains the lyrics of songs. Now, I am in a situation where I am thinking about the best way to make database for it.
I would like the basic lyrics to be downloaded to the device with the app, but also that the user can add other songs that would only be visible to him. Which way is the best? I think, that all songs could be saved into some database (for example in device storage or SD-card). I think about SQLite or Firebase, but is this the right way?
Thank you for all your advice ;)
Whole solution seems like a good use case for Firebase/Firestore.
Firestore seems to integrate well with mobile apps. It's also managed so it's a simple way to run a database for a mobile app given you can provide the customer with direct access to the database without the need for a backend.

How do I authenticate users of a web-app to access GCP data relevant only to them?

I have spent 3 days researching this problem and cannot find a solution or similar use case that shows how to solve the problem, so any pointers would be greatly appreciated.
I am creating a web-app that uses Google Cloud Storage and Bigquery. A user registers on the web app and then can upload data to Cloud Storage and Big Query. Two users could be from the same company and therefore should be able to view the same data - i.e. Jack and Jill work for company A and if Jack uploads a massive dataset via this app, Jill should also be able to view it later.
Another scenario will be I have two completely separate clients with users using this web-app. If users from Company A upload data, users from Company B should not be able to view Company A's data, and vice versa. But users from the same company should be able to view the data within their company.
Currently, I have an app that works for a single company. This has a React front-end that uses Firebase for authentication. Once the user is logged in, they can use the app which sends off API calls to a Flask back-end that does some error checking and authentication checking and then fires off an API call to GCP. This uses a service account and the key is loaded as an environment variable in the environment in which the Flask app is running.
However, if Company B want to use the app now, both Company A and Company B will be able to see each other's data and visualize it through the app. In addition, they will be sharing a project (I would like to change this to allocate billing more easily to have each client have their own project).
I ultimately want to get this app onto Kubernetes and ensure that each company is independent of each other, however, do not want to have to have separate URL's for every company using the app. Also, I want to abstract GCP away from the client. I would prefer to authenticate a user based on their login credentials and then they will be given access to their GCP project (via my front-end) accordingly.
I thought about perhaps having separate service keys for each client and then storing the service key info in Firebase, while using the respective keys for API calls but not sure this is best practice. It is however the only strategy I can think of.
If anyone could provide some help or guidance it would be very much appreciated. This is my first GCP project and have not been able to find any answers on GCP, SO, Google Groups, Slack or Medium.
Thanks,
TJ
First if all, welcome on GCP! It's an awesome platform, very powerful and flexible. But not magic.
Indeed, the use case that you describe is specific to your business logic. GCP provides told for securing access for user and VM(through service account) but not for customer. Here you have to implement your own custom and authorisation logic, with a database (I don't recommend bigquery for website, the latency is too high) to list three users, the companies where they work, the blobs of each company...
Nothing is magic and your use case specific.
If you want to discuss more about which component to use and to start, no problem. Let a comment.

Salesforce: is it possible to develop a web application on top of Salesforce

Let me start with a bit of background: I'm helping a non-profit organization that would like to have a browser-based application that is backed by Salesforce, but has very specific requirements.
I see Salesforce has a REST API that we can call, so we can develop a standalone application to serve the web pages they want and use the REST API to call Salesforce when needed.
I'm wondering if there is a way to host a web application directly on Salesforce; this way we don't have to have a separate application server. Any recommendations or pointers to documentation/open source products is greatly appreciated.
Yes, you can create services that will allow your app to hit Salesforce
Depending on the type of application, yes you can host it on salesforce using the Salesforce Sites feature, also you can develop and host your app on Heroku which is owned by salesforce and can sync data to and from salesforce using Heroku Connect, or you can build and host it on another service like AWS and connect via the REST API. You just need to investigate and choose the option that best fits your use-case. One thing to be aware of is that there are API limits (the number of calls you can make to salesforce in a rolling 24hr period). Depending the the needs of the app be sure to see if those limits will be an issue. Because if the app makes constant calls to salesforce that could be an issue. But there are things you can do to get around that, like caching.
Yes, both Force.com Sites and Site.com features allow you to host webpages on the Force.com Platform. The markup is stored in Visualforce Pages and can use Apex to access records in the Database. I have migrated multiple websites (including our company's www.mkpartners.com) to Force.com using Force.com Sites.
One thing to keep in mind is that you are limited to 500,000 views per month and the rendering of a page with images that are also stored on the platform will incur a single view for the page and a single view for each image. If you already have a very popular website, I wouldn't migrate. If you're a small business or nonprofit, then it should be fine.
Another thing to keep in mind is that dynamic functionality based on records in the database will not work during maintenance windows. There is the ability to upload a static version of your website to be rendered during these windows though.

questions about mobile app with ontology based backend

Our company is thinking about a mobile app (android, ios) that needs to comunicate with a backend sending "questions" and receiving "answers", based on a search in an ontology database.
I have some questions:
1)What is the state of the art in ontology database at the moment (both commercial or open source)?
2)In order to develop such a backend, what kind of server(software) is required?
3)Since this application is supposed to have thousands of users at a time (it is meant for public administration purposes), what kind of server (hardware) would be require? (distribuited server, load balanced, etc).
Thank you very much.

Database app, accessible from Mac, iPad and Web

I feel very out of my depth with this query, but not being able to do it isn't really an option so I am going to have to learn how one way or another.
I have been tasked with building an application / database for a Chauffeur company. I have done similar things before in Microsoft Access for other customers, hence getting this request, but this customer wants to be able to run the app on their Mac, and not install Windows. My only real experience of coding is HTML/CSS and some VBA when using Microsoft Access. For these Access DBs I have created separate front and back end files to allow multi user access and also remote access (the back end file being kept on the company server).
So onto my query (apologies for dragging it out)...
I need to be able to build something that the single user can open and run on his Mac, so he can view, add, change jobs and their details. He also needs to have the same access on his iPad, although purely viewing would suffice.
As regards the web access, basically he wants to be able to go onto his "Booking System" application, go to "New Job" and send a link to his client, where they would click the link in a browser, fill in the details (Name, Contact Number, collection and drop off addresses, collection date and time etc...) and when they submit this form the details be updated on his booking system.
My issue is I do not really know where to start. I just need some pointers as to where to get started. Is it an issue of building a MySQL database back end and then hosting this somewhere and linking different front ends to it etc...
Yes, with multiple clients, the web is your best answer. For the cheapest hosting route, you can find good, inexpensive PHP and MySQL hosting that will provide what you need. You can design the front end with HTML/CSS, use PHP to develop the logic and data access, and use MySQL to host the data.
The Mac and iPad can access the application via the web URL--you will not be building an iOS app, rather the user will access the web site through a web browser. You can use some pretty neat tools like jQuery UI Mobile to create an app-like experience, but if you need to support multiple clients on a small budget, an iOS app and separate web site is not the way to go.
Make sure you have some PHP expertise available or figure this part out. There are tons of great resources on the web to get started. Good luck!

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