{
"Events" : {
"events" : {
"-KT5UMQAhDHs1bB8bKLc" : {
"activity" : "biking",
"address" : "54°05'45.8\"N 28°19'02.9\"E, просп. Мира 9, Жодино, Беларусь",
"category" : "sport",
"creatorID" : "m11EvlP19OSbEz8XYl2MsNCwGXX2",
"date" : 1475431200689,
"forFriends" : true,
"info" : "вттчтвт",
"name" : "ьаьатвтвтт",
"uid" : "-KT5UMQAhDHs1bB8bKLc"
},
"-KUSsl7RaL-dVoDCoSYT" : {
"activity" : "picnic",
"address" : "Узденский район, Узденский район, Беларусь",
"category" : "entertainment",
"creatorID" : "1RXDSJzSEXakxvNdM41Ae3nbHN72",
"date" : 1477328400000,
"forFriends" : false,
"info" : "45",
"name" : "Test of date",
"uid" : "-KUSsl7RaL-dVoDCoSYT"
}
},
"FriendsOF" : {
"NuKweeGv8zTgt1Vi9RcU3i1u86U2" : {
"1RXDSJzSEXakxvNdM41Ae3nbHN72" : true
},
"m11EvlP19OSbEz8XYl2MsNCwGXX2" : {
"1RXDSJzSEXakxvNdM41Ae3nbHN72" : true
}
},
"Users" : {
"1RXDSJzSEXakxvNdM41Ae3nbHN72" : {
"email" : "*#gmail.com",
"name" : "Алексей Гвоздицкий",
"picture" : "*.jpg"
},
"NuKweeGv8zTgt1Vi9RcU3i1u86U2" : {
"email" : "*#gmail.com",
"name" : "Ольга Гвоздицкая",
"picture" : "*.jpg"
},
"m11EvlP19OSbEz8XYl2MsNCwGXX2" : {
"email" : "*#gmail.com",
"name" : "Егор Александров",
"picture" : "*.jpg"
}
}
}
I have a list of "events". Every "event" can be "forFiends" only (only if current user is in event creators "FriendsOF" list, then he can see this event. FriendsOF it's a whitelist). All availiable for current user events i want to represent in RecyclerView.
I am stucked. I can get all data snapshot and then filter on client side it. But it is not way of Jedi, because i load tonns of unnecessary data. Another solution is to deny acces to event if user should not see it. But i don't understand how to do it. My ref is mEventsRef = FirebaseDatabase.getInstance().getReference().child("Events").child("events"); And rule i can make for
"events":{
"$eventId":{".read":....}
}
So according to this guide i'll get empty recyclerView because of "error callback triggered with PERMISSION_DENIED"
Help me to solve my problem please!
Related
I'm trying to restrict access to a particular groups if the user is not in the members list.
So this is my rule,
{
"rules": {
".read":"auth != null",
"groups": {
"$groupid":{
".read" : true,
".write" : "root.child('groupmembers').child($groupid).child('admins').child(root.child('users').child(auth.uid).child('username').val()).val()==true"
}
},
"groupchat":{
"$chatid":{
".read" : "root.child('groupmembers').child($chatid).child('members').child(root.child('users').child(auth.uid).child('username').val()).val()==true",
".write" : "root.child('groupmembers').child($chatid).child('members').child(root.child('users').child(auth.uid).child('username').val()).val()==true"
}
}
}
}
The first rule for "groups">"$groupid" works perfectly. But I'm getting problem with second rule for "groupchat"
DataStructure ex:
Group Chat structure
"groupchat" : {
"testinggroup" : {
"chat" : {
"-KiYN6RKZOyWI-qufWn3" : {
"message" : "Hey",
"timestamp" : 1493094660399,
"type" : "text",
"username" : "user2"
}
},
"lasttimestamp" : 1493094660674
}
}
Users Structure
"users":{
"ujciTL9oFKNylcgiGcdYqUxjcgA3" : {
"email" : "example#gmail.com",
"username" : "user1"
}
}
groupmembers structure
"groupmembers":{
"groupid":{
{
"admins" : {
"user1" : true,
"user3" : true
},
"members" : {
"user1" : true,
"user2" : true,
"user3" : true,
"user4" : true
}
}
}
}
groups structure
"groupid"{
{
"category" : "group category",
"creator" : "creator uid",
"desc" : "group desc",
"id" : "groupid",
"image" : "url",
"name" : "groupname"
}
}
Operation ex:
FirebaseDatabase.getInstance()
.getReference()
.child("groupchat")
.child(j)
.child("lasttimestamp")
.setValue(ServerValue.TIMESTAMP);
So to debug the errors
I added "myusername" in place of root.child('users').child(auth.uid).child('username').val()
and it's working.
But in the previous rule("For groups child") I added the same thing and it was working.
I don't know why I'm getting error.
I have very big problem. I have this structure in my Firebase:
I would like to save this structure in JSON file/String no matter. I would get such a result:
{
"-Ka8_NYNxaFCcZQ3eaTp" : {
"Persons" : {
"-KaHUTUan-l06OVjsUlu" : {
"birthDay" : "13.01.2017",
"deathDay" : "06.01.2017",
"lastName" : "LastName1",
"latitude" : "54.2039383",
"longitude" : "16.1930868",
"name" : "name1"
},
"-KaHU_nPOE2NlqTbhLxT" : {
"birthDay" : "11.01.2017",
"deathDay" : "03.01.2017",
"lastName" : "LastName2",
"latitude" : "54.2039383",
"longitude" : "16.1930868",
"name" : "name2"
}
},
"city" : "Wroclaw",
"county" : "county1",
"nameCemetery" : "nameCemetery1",
"province" : "province1",
"street" : "street1"
}
I tried through DataSnaphot but the result was not in the format JSON, e.g:
{-Ka8_NYNxaFCcZQ3eaTp={nameCemetery=nameCemetery1, street=street1, county=county1, province=province1, Persons={-KaHU_nPOE2NlqTbhLxT={name=Damian, latitude=54.2039383, lastName=Szeeczyk, birthDay=11.01.2017, longitude=16.1930868, deathDay=03.01.2017}, -KaHUTUan-l06OVjsUlu={name=name1, latitude=54.2039383, lastName=LastName1, birthDay=13.01.2017, longitude=16.1930868, deathDay=06.01.2017}}, city=Wroclaw}}
The most important for me is not to create JSONArray Persons, because then my application will run incorrectly.
In short, I would like to make a copy node (in my example key -"Ka8_NYNxaFCcZQ3eaTp"
I am making an app that should include chat. I would like to display conversations of the current user. I am not sure how to get only chats of the current user. This is my structure of database.
"chats" : {
"-KWYiJiFwE6miPNkKPe0" : {
"chatPartner1" : {
"id" : "rtg3ru7zNYQQp9LA484VIG5rItl1",
"name" : "ghjg",
"photo" : ""
},
"chatPartner2" : {
"id" : "rtg3ru7bzwwewNYQwwewetegb",
"name" : "petra",
"photo" : ""
},
"id" : "-KWYiJiFwE6miPNkKPe0",
"lastMessage" : "dhjcd",
"timestamp" : 1479141836276
}
This json represents storing message for specified chats according to its id.
"messages" : {
"-KWYiJiFwE6miPNkKPe0" : {
"-KWYiJiPWR3n_YcvokCm" : {
"senderId" : "rtg3ru7zNYQQp9LA484VIG5rItl1",
"text" : "dhjcd",
"timestamp" : 1479141836276
}
}
I would need to check if the chatPartner 1 or 2 contains id of the current user. Or do you know about better way to store chats?
Thanks
Having the following data:
"animals" : {
"a1" : {
"name" : "Dog"
},
"a2" : {
"name" : "Cat"
},
"a3" : {
"name" : "Cow"
}
},
"users" : {
"u1" : {
"favAnimals" : {
"a1" : true,
"a2" : true
},
"name" : "Danilo"
}
}
How can I display for the user, using the FirebaseListAdapter, the complete list of animals, highlighing user's favorite animals?
Is it possible to query and join them, to get a Database Reference that would watch for changes both in "/animals" and "/users/$uid/favAnimals" and return something like:
"animals" : {
"a1" : {
"name" : "Dog",
"fav" : true
},
"a2" : {
"name" : "Cat"
"fav" : true
},
"a3" : {
"name" : "Cow"
}
}
I wish to retrieve only the top 50 messages a user has within the database, with schema:
"individualMessages" : {
"99e4989b-a046-4c5f-9478-5ebd8bdc3ded" : {
"a96da7b1-7c4e-44bc-b82e-fc75bed52bcd" : {
"-KBUjngi9JStE-k4RMUJ" : {
"from" : "a96da7b1-7c4e-44bc-b82e-fc75bed52bcd",
"messageText" : "hey",
"timeSent" : "2016-02-26 17:40:46"
},
"-KBYhsRONfGxVI7Ysb3F" : {
"from" : "a96da7b1-7c4e-44bc-b82e-fc75bed52bcd",
"messageText" : "pool",
"timeSent" : "2016-02-27 12:10:52"
}
},
"fdb17f3a-7b7d-4aa5-9a0b-b9fb33c349de" : {
"-KBcYtQ5gD-drFZqz_MU" : {
"from" : "fdb17f3a-7b7d-4aa5-9a0b-b9fb33c349de",
"messageText" : "ouu",
"timeSent" : "2016-02-28 10:46:52"
},
"-KBcYw24M-9-7H5A3czD" : {
"from" : "fdb17f3a-7b7d-4aa5-9a0b-b9fb33c349de",
"messageText" : "gsf",
"timeSent" : "2016-02-28 10:47:03"
}
However, simply using:
individualMessageMyPath = myFeastFirebase.child("individualMessages").child(.....
getTop50Messages = individualMessageMyPath.limitToLast(5);
getTop50Messages.orderByChild("timeSent").addChildEventListener(mainMessagingListener);
Returns all messages on that node.
Reviewing the documentation this should work, however it does not.
What is missing?