Firebase Retrieving Data by multiple where condition
I've trouble in retrieving data from firebase database.
Here is my table structure.
Here is my code to retrieve data.
firebase.database().ref('messages/')
.orderByKey()
.startAt(C5)
.endAt(C4)
.on('value', function(snapshot)
console.log(snapshot.val());
);
javascript firebase
asked Nov 14 '18 at 4:51
user8063037user8063037
716
add a comment |
I've trouble in retrieving data from firebase database.
Here is my table structure.
Here is my code to retrieve data.
firebase.database().ref('messages/')
.orderByKey()
.startAt(C5)
.endAt(C4)
.on('value', function(snapshot)
console.log(snapshot.val());
);
javascript firebase
asked Nov 14 '18 at 4:51
user8063037user8063037
716
You're not using this correctly, your concept is wrong
– Zlytherin
Nov 14 '18 at 5:01
add a comment |
I've trouble in retrieving data from firebase database.
Here is my table structure.
Here is my code to retrieve data.
firebase.database().ref('messages/')
.orderByKey()
.startAt(C5)
.endAt(C4)
.on('value', function(snapshot)
console.log(snapshot.val());
);
javascript firebase
asked Nov 14 '18 at 4:51
user8063037user8063037
716
I've trouble in retrieving data from firebase database.
Here is my table structure.
Here is my code to retrieve data.
firebase.database().ref('messages/')
.orderByKey()
.startAt(C5)
.endAt(C4)
.on('value', function(snapshot)
console.log(snapshot.val());
);
javascript firebase
javascript firebase
asked Nov 14 '18 at 4:51
user8063037user8063037
716
asked Nov 14 '18 at 4:51
user8063037user8063037
716
asked Nov 14 '18 at 4:51
user8063037user8063037
716
asked Nov 14 '18 at 4:51
user8063037user8063037
716
asked Nov 14 '18 at 4:51
user8063037user8063037
716
716
You're not using this correctly, your concept is wrong
– Zlytherin
Nov 14 '18 at 5:01
add a comment |
You're not using this correctly, your concept is wrong
– Zlytherin
Nov 14 '18 at 5:01
You're not using this correctly, your concept is wrong
– Zlytherin
Nov 14 '18 at 5:01
You're not using this correctly, your concept is wrong
– Zlytherin
Nov 14 '18 at 5:01
add a comment |
1 Answer
1
active
oldest
votes
Neither of the nodes in your screenshot has a key in the range C5...C4, which is actually an empty range. The keys in our screenshot are 1 and 2.
If you're trying to find all messages from users in the range "C4"..."C5", then you can do so by:
firebase.database().ref('messages/')
.orderByChild("from_id")
.startAt("C4")
.endAt("C5")
.on('value', function(snapshot)
snapshot.forEach(function(message)
console.log(message.val());
);
);
answered Nov 14 '18 at 5:02
Frank van PuffelenFrank van Puffelen
232k29380406
Thank you very much.
– user8063037
Nov 14 '18 at 7:43
add a comment |
Your Answer
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
Neither of the nodes in your screenshot has a key in the range C5...C4, which is actually an empty range. The keys in our screenshot are 1 and 2.
If you're trying to find all messages from users in the range "C4"..."C5", then you can do so by:
firebase.database().ref('messages/')
.orderByChild("from_id")
.startAt("C4")
.endAt("C5")
.on('value', function(snapshot)
snapshot.forEach(function(message)
console.log(message.val());
);
);
answered Nov 14 '18 at 5:02
Frank van PuffelenFrank van Puffelen
232k29380406
Thank you very much.
– user8063037
Nov 14 '18 at 7:43
add a comment |
Neither of the nodes in your screenshot has a key in the range C5...C4, which is actually an empty range. The keys in our screenshot are 1 and 2.
If you're trying to find all messages from users in the range "C4"..."C5", then you can do so by:
firebase.database().ref('messages/')
.orderByChild("from_id")
.startAt("C4")
.endAt("C5")
.on('value', function(snapshot)
snapshot.forEach(function(message)
console.log(message.val());
);
);
answered Nov 14 '18 at 5:02
Frank van PuffelenFrank van Puffelen
232k29380406
Thank you very much.
– user8063037
Nov 14 '18 at 7:43
add a comment |
Neither of the nodes in your screenshot has a key in the range C5...C4, which is actually an empty range. The keys in our screenshot are 1 and 2.
If you're trying to find all messages from users in the range "C4"..."C5", then you can do so by:
firebase.database().ref('messages/')
.orderByChild("from_id")
.startAt("C4")
.endAt("C5")
.on('value', function(snapshot)
snapshot.forEach(function(message)
console.log(message.val());
);
);
answered Nov 14 '18 at 5:02
Frank van PuffelenFrank van Puffelen
232k29380406
Neither of the nodes in your screenshot has a key in the range C5...C4, which is actually an empty range. The keys in our screenshot are 1 and 2.
If you're trying to find all messages from users in the range "C4"..."C5", then you can do so by:
firebase.database().ref('messages/')
.orderByChild("from_id")
.startAt("C4")
.endAt("C5")
.on('value', function(snapshot)
snapshot.forEach(function(message)
console.log(message.val());
);
);
answered Nov 14 '18 at 5:02
Frank van PuffelenFrank van Puffelen
232k29380406
answered Nov 14 '18 at 5:02
Frank van PuffelenFrank van Puffelen
232k29380406
answered Nov 14 '18 at 5:02
Frank van PuffelenFrank van Puffelen
232k29380406
answered Nov 14 '18 at 5:02
Frank van PuffelenFrank van Puffelen
232k29380406
232k29380406
Thank you very much.
– user8063037
Nov 14 '18 at 7:43
add a comment |
Thank you very much.
– user8063037
Nov 14 '18 at 7:43
Thank you very much.
– user8063037
Nov 14 '18 at 7:43
Thank you very much.
– user8063037
Nov 14 '18 at 7:43
add a comment |
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You're not using this correctly, your concept is wrong
– Zlytherin
Nov 14 '18 at 5:01