How to set variables to Firebase DB values in MIT App Inventor?
I tried with direct setting but the blocks cant match.
Because getting values from an online database like firebase is asynchronous (it can take a second to complete), you have to ask for the values you want and wait for the database to give them to you. See the screenshot below for an example.
It would also help if you could please edit your question to provide some more information. You could include a screenshot of your relevant blocks or describe the problem more thoroughly.
Related
I am developing a cs-cart based website and my client wants to integrate Fishbowl into his website.
I have searched an add-on for it, but there is no one for me.
I have experience developed a simple add-on and, now I am going to build one add-on to integrate fishbowl.
Please guide me if you have solid experience on integrating fishbowl and cs-cart or another warehouse solution for cs-cart.
I don't understand why the fishbowl doesn't provide or developed the add-on for it.
Please help!
Thanks for reading!
Well, there are a few things to watch out for, and therefore a number of options.
Firstly, what does your client really want. Does he want the stock to be updated on the fly, or once a night? If the client wants to stock to be updated on the fly you will need to add some sort of post function for updating products to also execute your code. If your client wants it only once a night you could just get away by sending every product in the database (with your selected columns).
Secondly, try using object oriented code. If you are really into PHP you will know what I mean by this. Otherwise dont bother (or try learing PHP Object Oriented), though I must note that this can make your addon significantly faster.
Thirdly, use the provided dbquery function
If you have any more questions regarding this, feel free to ask.
I would like to build a chrome extension (CE) that pulls data from a ruby db for a specific user. So, in a basic example, if an user submits their favorite color as 'red' and sport as 'tennis' into the db from the core website, when they click the CE, 'red' and 'tennis' will show up no matter where they are on the internet.
Any guidance on how to build something like this? Seems quite simple but am not sure how the CE files fit in with the ruby folder framework.
Also, is it possible to write to a ruby database from a popped out CE? i.e. - submitting 'red' and 'tennis' from the CE to the ruby database to go along with the previous example. Any guidance?
Cheers
This is a very general question so it sounds like you will need to learn a lot. Which can be a good thing :)
Here are the general steps you need:
Look into building an API for your ruby application. This will allow you to get data from your database. For example, you can
make an app where you go to http://yoursite.com/api/favorites and that will return a list of all favorites as JSON. Then in your Chrome Extension you can parse the JSON and display the results to the user. You will probably want to do this using an ajax call (see jquery.ajax for an easy way to use ajax).
Assuming you want user accounts, your user will need to be logged in. Then you can use your user's cookies to verify that they are logged in and show them custom info. i.e. going to http://yoursite.com/api/favorites will just show the favorites for that user, not for everyone.
Finally, submitting things to the database...you can have another route where users can send stuff. For example, if you go to http://yoursite.com/api/favorites/add?color=red then it will add the color red to that user's favorites. You will need to write all the logic for adding stuff to the database...again, it might help you to go through a rails tutorial and then look at building an API.
Related to #3, look into RESTful APIs. A good convention is that if you issue a GET request, you're asking for data, but if you issue a POST request, you are adding data (in your case, creating a new favorite).
Finally, for terminology: it's not a "ruby" database, it's just a database. You can access a database using almost any language, and it sounds like you are accessing it using ruby right now :)
If you only need to store data for one machine browsing anywhere online, chrome has a storage api that would work great.
If you do need a ruby server, I would recommend looking at sinatra.
I am working for a business that deals with auto body shops - we have them subscribed to a service and want to enhance that service by utilizing the Goolge Places API.
I would like to update the places entries by adding or changing specific photos, descriptions and contact info. I realize there is a section of the documentation that deals with adding a 'place report' but I felt this flow was unclear and/or ambiguous.
In other words, what happens when i place this report? Is there a vetting process that only google is involved in? Does this even do what I'm asking it to do? Is this creating a new entry entirely?
Any help on clarification is appreciated. I may have missed the obvious here so if you feel that way let me know with a link please.
The Places Photo service is a read-only API that allows you to easily add high quality photographic content to your application.
https://developers.google.com/places/documentation/photos
Did you not understand the 'read-only' part?
I would like to create a web page, which documents manually-inputted data about user permissions, that looks like below, which is really pulling data out of a MySQL table.
The way it should act is that whenever someone updates the table to overwrite a value, the old values are stored in a log as a "past revision" -- Which I have no problem on the database side, but I want those past revisions to show up behind the current data on the website, as seen below.
Someone needs to be able to see the current data at a glance, but also the past revisions that expand somehow when clicked. I want this done without having the page refreshed, so maybe jQuery or some active scripting?
That's the heart of the question here, is what technology can easily accomplish the needs of this interface? What do you guys recommend? Examples would be very beneficial. Thanks in advance.
You may try out SVG (along with some jquery for some rich interface):
http://www.w3schools.com/svg/default.asp
Say, with in my application, I have a list of friends (Twitter IDs) the user follow. I show their name and their image (from Twitter). Every time the user logs into the application, I want to get the recent profile display image from Twitter.
How do I know, someone changed their Twitter profile image?
Currently, I think, I need to get their image (I use Twitter API: GET users/profile_image/:screen_name) and find the modify time and if it is not newer, I assume it is not changed. Is there a better way of doing it? How would you do if you have to built something like this? I hate getting all the image files and checking them one after one. I hope there is a better way to get the images of those who have made a change to their profile recently.
You can try looking at http://api.twitter.com/1/account/verify_credentials.json and see if anything in there tracks profile changes although I doubt it. (Try using: https://dev.twitter.com/console for an easier interface).
If you can't find anything in the API, then there is not way to know that the profile image has changed without checking. In which case, you can store a hash of the old image, and compare the hash of any new images, and see if they match. If they do not, then you know it has changed.
Hope that helps.