Firebase Database Query-get previous 20 key before specific key?
I'm trying to do pagination. I want to get previous 20 key before my specific key.
For example:
When i say last key i mean its last key in my array list.Its not the last key of my databse.
firebase firebase-realtime-database
asked Jan 1 at 7:49
UzaySanUzaySan
858
add a comment |
I'm trying to do pagination. I want to get previous 20 key before my specific key.
For example:
When i say last key i mean its last key in my array list.Its not the last key of my databse.
firebase firebase-realtime-database
asked Jan 1 at 7:49
UzaySanUzaySan
858
add a comment |
I'm trying to do pagination. I want to get previous 20 key before my specific key.
For example:
When i say last key i mean its last key in my array list.Its not the last key of my databse.
firebase firebase-realtime-database
asked Jan 1 at 7:49
UzaySanUzaySan
858
I'm trying to do pagination. I want to get previous 20 key before my specific key.
For example:
When i say last key i mean its last key in my array list.Its not the last key of my databse.
firebase firebase-realtime-database
firebase firebase-realtime-database
asked Jan 1 at 7:49
UzaySanUzaySan
858
asked Jan 1 at 7:49
UzaySanUzaySan
858
edited Jan 1 at 7:55
UzaySan
asked Jan 1 at 7:49
UzaySanUzaySan
858
asked Jan 1 at 7:49
UzaySanUzaySan
858
asked Jan 1 at 7:49
UzaySanUzaySan
858
858
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
If you have the specific key you can query the previous keys like this in javascript:
db.ref("YOUR parent node name").orderByKey().endAt("THE LAST KEY").limitToLast(20).once('value)
You can easily translate this code to any platform you are using.
answered Jan 1 at 8:18
Umar HussainUmar Hussain
2,0651718
It doesnt work "reference.orderByKey().endAt(list.get(list.size()-1)).limitToLast(30);" this is my code but still same
– UzaySan
Jan 1 at 8:52
please add the complete code in your question where you are getting the data. What does list contains ?
– Umar Hussain
Jan 1 at 8:58
Its my bad.your code is working fine
– UzaySan
Jan 1 at 9:34
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
If you have the specific key you can query the previous keys like this in javascript:
db.ref("YOUR parent node name").orderByKey().endAt("THE LAST KEY").limitToLast(20).once('value)
You can easily translate this code to any platform you are using.
answered Jan 1 at 8:18
Umar HussainUmar Hussain
2,0651718
It doesnt work "reference.orderByKey().endAt(list.get(list.size()-1)).limitToLast(30);" this is my code but still same
– UzaySan
Jan 1 at 8:52
please add the complete code in your question where you are getting the data. What does list contains ?
– Umar Hussain
Jan 1 at 8:58
Its my bad.your code is working fine
– UzaySan
Jan 1 at 9:34
add a comment |
If you have the specific key you can query the previous keys like this in javascript:
db.ref("YOUR parent node name").orderByKey().endAt("THE LAST KEY").limitToLast(20).once('value)
You can easily translate this code to any platform you are using.
answered Jan 1 at 8:18
Umar HussainUmar Hussain
2,0651718
It doesnt work "reference.orderByKey().endAt(list.get(list.size()-1)).limitToLast(30);" this is my code but still same
– UzaySan
Jan 1 at 8:52
please add the complete code in your question where you are getting the data. What does list contains ?
– Umar Hussain
Jan 1 at 8:58
Its my bad.your code is working fine
– UzaySan
Jan 1 at 9:34
add a comment |
If you have the specific key you can query the previous keys like this in javascript:
db.ref("YOUR parent node name").orderByKey().endAt("THE LAST KEY").limitToLast(20).once('value)
You can easily translate this code to any platform you are using.
answered Jan 1 at 8:18
Umar HussainUmar Hussain
2,0651718
If you have the specific key you can query the previous keys like this in javascript:
db.ref("YOUR parent node name").orderByKey().endAt("THE LAST KEY").limitToLast(20).once('value)
You can easily translate this code to any platform you are using.
answered Jan 1 at 8:18
Umar HussainUmar Hussain
2,0651718
answered Jan 1 at 8:18
Umar HussainUmar Hussain
2,0651718
answered Jan 1 at 8:18
Umar HussainUmar Hussain
2,0651718
answered Jan 1 at 8:18
Umar HussainUmar Hussain
2,0651718
2,0651718
It doesnt work "reference.orderByKey().endAt(list.get(list.size()-1)).limitToLast(30);" this is my code but still same
– UzaySan
Jan 1 at 8:52
please add the complete code in your question where you are getting the data. What does list contains ?
– Umar Hussain
Jan 1 at 8:58
Its my bad.your code is working fine
– UzaySan
Jan 1 at 9:34
add a comment |
It doesnt work "reference.orderByKey().endAt(list.get(list.size()-1)).limitToLast(30);" this is my code but still same
– UzaySan
Jan 1 at 8:52
please add the complete code in your question where you are getting the data. What does list contains ?
– Umar Hussain
Jan 1 at 8:58
Its my bad.your code is working fine
– UzaySan
Jan 1 at 9:34
It doesnt work "reference.orderByKey().endAt(list.get(list.size()-1)).limitToLast(30);" this is my code but still same
– UzaySan
Jan 1 at 8:52
It doesnt work "reference.orderByKey().endAt(list.get(list.size()-1)).limitToLast(30);" this is my code but still same
– UzaySan
Jan 1 at 8:52
please add the complete code in your question where you are getting the data. What does list contains ?
– Umar Hussain
Jan 1 at 8:58
please add the complete code in your question where you are getting the data. What does list contains ?
– Umar Hussain
Jan 1 at 8:58
Its my bad.your code is working fine
– UzaySan
Jan 1 at 9:34
Its my bad.your code is working fine
– UzaySan
Jan 1 at 9:34
add a comment |
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