Dynamic Children Query Versus Backend Query: What's the difference? - Flutterflow

In this short tutorial, I will address some of the main differences between a standard backend query and a dynamic children query, how I use them, why I use them, and where document from reference plays a role in querying dynamic children. Understanding how, why and when you would use dynamic children instead of a backend query can make generating data for users much easier and less time consuming.

[leonlim]

Great explanation on the concept and use case for Dynamic Children and Backend Query. Enjoy your well-deserved vacation and look forward to more tutorials in the coming week. Cheers

[beepypeepy]

Looking forward to more! Enjoy your much-deserved vacation!

[IspyrGameDev]

Excellent tutorial and well explained, the last step was tripping me up. Cheers! You have a new sub

[sharonid]

thank you so much for making this video I wasn't able to figure out how to display those damn info

[ermanozkaya]

This a very beneficial tutorial. Thank you

[iusoa]

Thank you so much for this tutorial!! You've saved me

[citywomanng]

Thank you so much. This was really helpful

[guyfeigin]

Great video. I have background in C.S so I can understand what's happening under the hood, i.e lists and pointers. I think that if you drew diagrams of pointers and lists can help to understand better. Thanks again !!!

[EmblazNOR]

Thank you! Enjoy your vacation, sincerely

[TinnitusCureandMasks]

Thanks you for this video. Do you you how to refresh the ListView, generated with Dynamic Children ? Because everything work fine, but the refreshing. I have goto another page and then come back to the listview page for seeing the changes...
I made exactly the same ListView but with the classical QUERY method (without "One time Query'), and the page refreshed ...
So I dunno what to do, because I really want to keep the Dynamic Chiidlren...
Thank you !

[raffaelyork]

Hi, nice vid! Would you mind creating a video where you can explain what's the difference between Doc Reference and Query Collection?

[amritbanerjee]

Which costs more eventually? Getting all the documents info in one query or getting each document’s info one query at a time?

[BriqueStudios]

So I have a list of categories. Everything is going smoothly until I try to create a document in a subcategory based on the list of categories ; then I can’t query that sub collection / cat when I click on the category. Help please?

[MTGameMaker]

thanks i was looking for this but i am just worried that it may take to many calls to the database !!!

[AlfaRomeoFox]

Everything goes well until I reached minute 7:56... it seems that something changed on FF that it doesn´t allow to choose the friendslist item, because in this version index in list (in red) doesn´t go away and it appear a message "variable not valid". Do you have any update... I will much appreciate it.

[vincend]

Thank God for your videos. I dont think Flutterflow has made a decent video explaining this concept.
I think i'm getting the hang of it now (document reference, etc).

I wish Flutterflow would simplify the process though... one of the things that confused me in the beginning was: having "Document from reference" under Backend Query section, but also have Document from reference in the Variable section and also in the Firestore section.

7:52 is confusing if you dont know/ never done this. So thanks for clearing that up.

The only other part that would confuse me is passing parameters from page to page.

Like if i got the list of users and wanted to visit that users profile, would i need to pass a parameter and the doc reference or the entire document?? It gets confusing after a while.

[Caden_Burleson]

Could you go through some of the options @4:30 You say you could use array contains, but then don't do it. I'm curious of the various other ways you might be able to set something like this up.

[travl]

Great video! Appreciate the help. Follow-up, how would you go about filtering the document references returned in your example? Say each user document had a field "status" that was a boolean. So the goal would be to return the list of friends as you did but only the ones where their status field was == TRUE? When I try to filter list items instead of map list items in the generate children settings, there are no options available...but maybe I am doing it incorrectly?

[qrdlypt]

Sir if I have 100 datas and need to show 10 collection in each page view and in next page of page view I will show another 10 collection of data. Can I achieve this with generate dynamic children? How can I make it such that next page view will show other 10 data from same table but not the ones in previous page and so on for 10 pages? Do I need to do create 10 pages and do It manually or is there some other efficient way to do that?

[MyGoldenCleaners]

Holy been looking for someone to help me do this.. 10likees