I have a cloud firestore collection of users, all with the name, username, email, password and follower fields and basically what i am trying to do in this app is create a follow button and an unfollow button. When the follow is clicked, i want the followers field of that particular user to be updated with the 'username' of the current user and when i click the unfollow button, i want the username to be removed.How do i go about doing this? P.S Adding the username of the current user to the followed users follower field is just how i thought it would make sense so if there are better way to solving this, i am absolutely open to them
from my opinion
you may need to create a list/array of followers and every time user
hits follow button it adds this user to this list
or
you can do junction table put simply you will need to create a collection named USERID_FOLLOWERS and every time user hits its just
add or remove specific document and this is better to deal with big
data
Related
I am very new to coding. but i managed to build a group chat app using a low code platform called flutterflow. i managed to spend significant amount of time on it and was able to build a public group chat app except few functionalities. I am hoping to find help from here. for the following questions.
I have chat mods appointed on a group level. like if you create a group, you are a founder and you can assign mods to that perticular group chat. now i want these mods to be able to ban a user in that particular group chat.
I have tried created a subcollection in groups called "banned user" and created two feilds. one is "banned users" document reference to users. and another is "banned_till" to record a time stamp until the user gets banned.
Problem with this is when i ban a user twice, it creates two documents in the user reference with the same user. and two documents has different "banned_till" times. which one it is supposed to pick?
i tried to do this and put a conditional visibility to the chat that "if current time is less than or equal to banned_till time" it wont let user type in the textfield to chat. but this is giving me gray screen.
I am very new to this. any help would be appreciated.
there is specific way to do so. you have to set custom logic. like save all banned users in a firebase database object with thier max time and procced next.
I'm creating a appointment app in flutter using firebase in which I have keep the track of people that got appointment repeatedly based on their phone number . How do I get this count of repeated entries?
it would be better if you add some code and more information to your question so we can can answer correctly but based on my understanding you want to check if this user repeatedly booked appointments using your app considering that it is a logged in user not a guest,
in this case inside your Firestore collection that contains the users i assume that each document represent a user add to each document (user information) a counter (integer variable) called for example "appointementsNumber" and every time a user book an appointment this counter will be increased by one, in this case you are able to know how many times this user booked an appointment.
hopefully i did understand your question correctly.
I am trying to create an OTP verification process wherein through the signup route, the user will enter the signup details such as phone number, gender. The function will save the data along with an OTP to an OTPdata model schema. In the verifyOtp route, the user will enter the OTP, and the function will check if the otp already exists, if it does, it will copy the whole document to other User model. I don't know how to copy documents of one model to other based on certain condition (if it has the same the otp the user entered). Can anyone help me? Or is there any better approach?
I am making a chess app which has a Firebase backend, i am using cloud firestore and cloud functions. basically i am using node 8 to avoid billing issues on cloud functions, i can call and trigger, but i can't wrap my head about how to make an action happen on another device instead of on my own.
After authenticating and logging in, the user gets into a lobby which is a tableViewController and there are shown only the users that are currently logged in.
What i want to achieve is by tapping on a certain row the user that got the tap on it gets an alert shown for him which states whether he accepts the challenge or he declines it. Based on that i proceed to the game or do something else.
The question is though how to make this alert trigger on the other user's device?
Also i've seen some posts that it can be done with snapshotListener on a document, but again i run into the problem of understanding how to trigger the alert on another device. If you've got some other good ideas please share!
Thank you for any feedback!
I think snapshot listeners are really the only way to go. You could use other Firebase services but those aren’t the right tools for the job. Consider creating a collection, maybe call it requests:
[requests]
<userId-userId> (recipientUserId-initiatorUserId)
initiator: string
recipient: string
date: date
Each user has a snapshot listener that listens to this collection where their own userId is equal to recipient. You can add a date field to sort the list by most recent, for example. When a user wants to challenge another user, all they need to do is create a document in this collection:
<userId-userId> (recipientUserId-initiatorUserId)
initiator: myUserId
recipient: theirUserId
date: now
And the recipient's client will instantly see this document.
You could include dressing data in this document, like the initiator's display name or a path to their avatar. But this data may be stale by the time it's rendered so the alternative is to fetch the dressing data from the database using the userId. You could also auto-gen the document ID but if you configure it (like this), it can make operations like deleting simpler. You could also configure the userIds to be alphanumerical so only one request can exist between two users; but if they requested each other at the same time, one would overwrite the other and you'd have to handle that potential edge case. There are lots of things to consider but this is the starting point.
I'm creating a social media app. I'm able to allow the current user to search for a PFUser and add the user to a friendship relation. I'm struggling on accessing the friendship relation and getting all the friends to create a table view right now. Could someone help me with this?
A Relation type in Parse represents just like what it literal meaning is. It's just a relation that contains no data. If you want to access the data inside the relation. You will need to perform query on it like so:
let query = relation.query() // I assume relation is an instance of PFRelation you want
Actually, Parse tutorial provides us a very comprehensive guide and you should check that first: https://parse.com/docs/ios/guide#relations
NOTE: This answer provides alternatives to using Relations to make a Friend System
I have created a friend system in two ways using Parse and both a function of your specific needs.
The first time I implemented a friend system. I had a table of Users and a table of Relationships. The Relationships table stored the usernames (or ObjectIds) of the two users in a relationship and the state of that relationship (friends, request sent, etc). The problem with this is that the queries can be kinda complicated, and if you have a lot of users, this may end up being too slow.
The second option is storing friend information in the User table itself. For each user, you add the columns with they type Array: Friends, RequestSent, and RequestReceived. Anytime a user sends a request they update their own user row and send a message to CloudCode to update the other affected user. Take a look at this example:
User A sends a request to User B:
User A adds user B's name to RequestSent
User A sends a message to cloud code that he/she wants to add user B
CloudCode adds User A's name to User B's RequestReceived
User B wants to accept User A's request
User B adds user A's name to Friends
User B removes user A's name from RequestSent
User B sends a message to CloudCode that he/she wants to accept User A's friend Request
CloudCode adds user A's name to Friends
CloudCode removes user A's name from RequestReceived
With this option, you never perform any server side queries. You only ever perform get operations. The downside to this option is if the logged-in user has thousands of friends/requests, it will take a while to download that information.
Note: The reason you have to use CloudCode is that a User can only change information about him/herself. The other option is to have CloudCode manage all the adding/removing so better checks can be made.
I found with this method that you can sometimes have one user who is listed a a friend in another users row but not their own. Controlling everything from CloudCode could eliminate this kind of error.