Firestore orderBy boolean and timestamp
I have a scenario where I need to paginate records in a collection based on a boolean and a timestamp field. So something like:
collection('jobs', ref =>
ref.orderBy('asap', 'desc')
.orderBy('posted')
.startAfter(offset)
.limit(this.batchSize)
asap is a boolean and posted is timestamp.
Basically I need to show a list of records where first records in the list are the asap=true ones and also these should then be ordered by posted date. And the list continues with records having asap=false and of course all these should be ordered by the posted date.
How can I achieve this ?
angular typescript firebase google-cloud-firestore angularfire2
edited Nov 11 '18 at 15:21
Frank van Puffelen
233k29380406
asked Nov 11 '18 at 14:48
RollyRolly
2318
add a comment |
I have a scenario where I need to paginate records in a collection based on a boolean and a timestamp field. So something like:
collection('jobs', ref =>
ref.orderBy('asap', 'desc')
.orderBy('posted')
.startAfter(offset)
.limit(this.batchSize)
asap is a boolean and posted is timestamp.
Basically I need to show a list of records where first records in the list are the asap=true ones and also these should then be ordered by posted date. And the list continues with records having asap=false and of course all these should be ordered by the posted date.
How can I achieve this ?
angular typescript firebase google-cloud-firestore angularfire2
edited Nov 11 '18 at 15:21
Frank van Puffelen
233k29380406
asked Nov 11 '18 at 14:48
RollyRolly
2318
1
Hello, what did you try? Does this query works?
– Renaud Tarnec
Nov 11 '18 at 14:59
My workaround was to change the boolean field into a number(priority) and I passed 2 arguments to the startAfter cursor with both the fields from last paginated record. I assume it reduced the ambiguity and seems to work as expected, although there is a small chance that there would be multiple records with same timestamp and same priority. I'm not sure if data will be correctly returned in this case.
– Rolly
Nov 12 '18 at 15:27
add a comment |
I have a scenario where I need to paginate records in a collection based on a boolean and a timestamp field. So something like:
collection('jobs', ref =>
ref.orderBy('asap', 'desc')
.orderBy('posted')
.startAfter(offset)
.limit(this.batchSize)
asap is a boolean and posted is timestamp.
Basically I need to show a list of records where first records in the list are the asap=true ones and also these should then be ordered by posted date. And the list continues with records having asap=false and of course all these should be ordered by the posted date.
How can I achieve this ?
angular typescript firebase google-cloud-firestore angularfire2
edited Nov 11 '18 at 15:21
Frank van Puffelen
233k29380406
asked Nov 11 '18 at 14:48
RollyRolly
2318
I have a scenario where I need to paginate records in a collection based on a boolean and a timestamp field. So something like:
collection('jobs', ref =>
ref.orderBy('asap', 'desc')
.orderBy('posted')
.startAfter(offset)
.limit(this.batchSize)
asap is a boolean and posted is timestamp.
Basically I need to show a list of records where first records in the list are the asap=true ones and also these should then be ordered by posted date. And the list continues with records having asap=false and of course all these should be ordered by the posted date.
How can I achieve this ?
angular typescript firebase google-cloud-firestore angularfire2
angular typescript firebase google-cloud-firestore angularfire2
edited Nov 11 '18 at 15:21
Frank van Puffelen
233k29380406
asked Nov 11 '18 at 14:48
RollyRolly
2318
edited Nov 11 '18 at 15:21
Frank van Puffelen
233k29380406
asked Nov 11 '18 at 14:48
RollyRolly
2318
edited Nov 11 '18 at 15:21
Frank van Puffelen
233k29380406
edited Nov 11 '18 at 15:21
Frank van Puffelen
233k29380406
edited Nov 11 '18 at 15:21
Frank van Puffelen
233k29380406
233k29380406
asked Nov 11 '18 at 14:48
RollyRolly
2318
asked Nov 11 '18 at 14:48
RollyRolly
2318
asked Nov 11 '18 at 14:48
RollyRolly
2318
2318
1
Hello, what did you try? Does this query works?
– Renaud Tarnec
Nov 11 '18 at 14:59
My workaround was to change the boolean field into a number(priority) and I passed 2 arguments to the startAfter cursor with both the fields from last paginated record. I assume it reduced the ambiguity and seems to work as expected, although there is a small chance that there would be multiple records with same timestamp and same priority. I'm not sure if data will be correctly returned in this case.
– Rolly
Nov 12 '18 at 15:27
add a comment |
1
Hello, what did you try? Does this query works?
– Renaud Tarnec
Nov 11 '18 at 14:59
My workaround was to change the boolean field into a number(priority) and I passed 2 arguments to the startAfter cursor with both the fields from last paginated record. I assume it reduced the ambiguity and seems to work as expected, although there is a small chance that there would be multiple records with same timestamp and same priority. I'm not sure if data will be correctly returned in this case.
– Rolly
Nov 12 '18 at 15:27
1
1
Hello, what did you try? Does this query works?
– Renaud Tarnec
Nov 11 '18 at 14:59
Hello, what did you try? Does this query works?
– Renaud Tarnec
Nov 11 '18 at 14:59
My workaround was to change the boolean field into a number(priority) and I passed 2 arguments to the startAfter cursor with both the fields from last paginated record. I assume it reduced the ambiguity and seems to work as expected, although there is a small chance that there would be multiple records with same timestamp and same priority. I'm not sure if data will be correctly returned in this case.
– Rolly
Nov 12 '18 at 15:27
My workaround was to change the boolean field into a number(priority) and I passed 2 arguments to the startAfter cursor with both the fields from last paginated record. I assume it reduced the ambiguity and seems to work as expected, although there is a small chance that there would be multiple records with same timestamp and same priority. I'm not sure if data will be correctly returned in this case.
– Rolly
Nov 12 '18 at 15:27
add a comment |
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1
Hello, what did you try? Does this query works?
– Renaud Tarnec
Nov 11 '18 at 14:59
My workaround was to change the boolean field into a number(priority) and I passed 2 arguments to the startAfter cursor with both the fields from last paginated record. I assume it reduced the ambiguity and seems to work as expected, although there is a small chance that there would be multiple records with same timestamp and same priority. I'm not sure if data will be correctly returned in this case.
– Rolly
Nov 12 '18 at 15:27