How to read data reference in a document firestore -flutter
-2
I'm developing an app with Firestore. I want to read the data of document A referenced from document B and get the fields I set in document B. I searched but can't seem to find a solution. Any help would be greatly appreciated.
android dart 
flutter google-cloud-firestore edited Nov 14 '18 at 1:26
dchi
212
asked Nov 13 '18 at 22:12
Folarin OpeyemiFolarin Opeyemi
62
|
show 2 more comments
-2
I'm developing an app with Firestore. I want to read the data of document A referenced from document B and get the fields I set in document B. I searched but can't seem to find a solution. Any help would be greatly appreciated.
android dart flutter google-cloud-firestore edited Nov 14 '18 at 1:26
dchi
212
asked Nov 13 '18 at 22:12
Folarin OpeyemiFolarin Opeyemi
62
Kindly show some code or explain it in detail. What attribute document has and on what basis (it's id or any attribute) you wanna fetch data.
– Xar E Ahmer
Nov 14 '18 at 6:09
I would shown code if I know how to
– Folarin Opeyemi
Nov 14 '18 at 9:01
Doc A has fields in it stored as string data type. Doc B has a data type Ref, referencing to Doc A. What I want is get the fields stored in Doc A through Doc B.
– Folarin Opeyemi
Nov 14 '18 at 9:02
You have to call two services first to get the parameter. First call is to get the reference type and then call service again with orderBy filter on that reference and limit to 1 to get only single record
– Xar E Ahmer
Nov 14 '18 at 10:59
Call two services, as in two streambuilder?
– Folarin Opeyemi
Nov 14 '18 at 11:02
|
show 2 more comments
-2
-2
-2
I'm developing an app with Firestore. I want to read the data of document A referenced from document B and get the fields I set in document B. I searched but can't seem to find a solution. Any help would be greatly appreciated.
android dart flutter google-cloud-firestore edited Nov 14 '18 at 1:26
dchi
212
asked Nov 13 '18 at 22:12
Folarin OpeyemiFolarin Opeyemi
62
I'm developing an app with Firestore. I want to read the data of document A referenced from document B and get the fields I set in document B. I searched but can't seem to find a solution. Any help would be greatly appreciated.
android dart flutter google-cloud-firestore android dart flutter google-cloud-firestore edited Nov 14 '18 at 1:26
dchi
212
asked Nov 13 '18 at 22:12
Folarin OpeyemiFolarin Opeyemi
62
edited Nov 14 '18 at 1:26
dchi
212
asked Nov 13 '18 at 22:12
Folarin OpeyemiFolarin Opeyemi
62
edited Nov 14 '18 at 1:26
dchi
212
edited Nov 14 '18 at 1:26
dchi
212
edited Nov 14 '18 at 1:26
dchi
212
212
asked Nov 13 '18 at 22:12
Folarin OpeyemiFolarin Opeyemi
62
asked Nov 13 '18 at 22:12
Folarin OpeyemiFolarin Opeyemi
62
asked Nov 13 '18 at 22:12
Folarin OpeyemiFolarin Opeyemi
62
62
Kindly show some code or explain it in detail. What attribute document has and on what basis (it's id or any attribute) you wanna fetch data.
– Xar E Ahmer
Nov 14 '18 at 6:09
I would shown code if I know how to
– Folarin Opeyemi
Nov 14 '18 at 9:01
Doc A has fields in it stored as string data type. Doc B has a data type Ref, referencing to Doc A. What I want is get the fields stored in Doc A through Doc B.
– Folarin Opeyemi
Nov 14 '18 at 9:02
You have to call two services first to get the parameter. First call is to get the reference type and then call service again with orderBy filter on that reference and limit to 1 to get only single record
– Xar E Ahmer
Nov 14 '18 at 10:59
Call two services, as in two streambuilder?
– Folarin Opeyemi
Nov 14 '18 at 11:02
|
show 2 more comments
Kindly show some code or explain it in detail. What attribute document has and on what basis (it's id or any attribute) you wanna fetch data.
– Xar E Ahmer
Nov 14 '18 at 6:09
I would shown code if I know how to
– Folarin Opeyemi
Nov 14 '18 at 9:01
Doc A has fields in it stored as string data type. Doc B has a data type Ref, referencing to Doc A. What I want is get the fields stored in Doc A through Doc B.
– Folarin Opeyemi
Nov 14 '18 at 9:02
You have to call two services first to get the parameter. First call is to get the reference type and then call service again with orderBy filter on that reference and limit to 1 to get only single record
– Xar E Ahmer
Nov 14 '18 at 10:59
Call two services, as in two streambuilder?
– Folarin Opeyemi
Nov 14 '18 at 11:02
Kindly show some code or explain it in detail. What attribute document has and on what basis (it's id or any attribute) you wanna fetch data.
– Xar E Ahmer
Nov 14 '18 at 6:09
Kindly show some code or explain it in detail. What attribute document has and on what basis (it's id or any attribute) you wanna fetch data.
– Xar E Ahmer
Nov 14 '18 at 6:09
I would shown code if I know how to
– Folarin Opeyemi
Nov 14 '18 at 9:01
I would shown code if I know how to
– Folarin Opeyemi
Nov 14 '18 at 9:01
Doc A has fields in it stored as string data type. Doc B has a data type Ref, referencing to Doc A. What I want is get the fields stored in Doc A through Doc B.
– Folarin Opeyemi
Nov 14 '18 at 9:02
Doc A has fields in it stored as string data type. Doc B has a data type Ref, referencing to Doc A. What I want is get the fields stored in Doc A through Doc B.
– Folarin Opeyemi
Nov 14 '18 at 9:02
You have to call two services first to get the parameter. First call is to get the reference type and then call service again with orderBy filter on that reference and limit to 1 to get only single record
– Xar E Ahmer
Nov 14 '18 at 10:59
You have to call two services first to get the parameter. First call is to get the reference type and then call service again with orderBy filter on that reference and limit to 1 to get only single record
– Xar E Ahmer
Nov 14 '18 at 10:59
Call two services, as in two streambuilder?
– Folarin Opeyemi
Nov 14 '18 at 11:02
Call two services, as in two streambuilder?
– Folarin Opeyemi
Nov 14 '18 at 11:02
|
show 2 more comments
1 Answer
1
active
oldest
votes
0
you can get ref_value like this
await Firestore.instance
.collection('collection')
.where('ref', isEqualTo: 'what you want to query')
.getDocuments()
.then((doc) {
ref_value = doc.documents[0]['ref'];
});
get another with that reference
await Firestore.instance
.collection('collection')
.where('ref', isEqualTo: ref_value)
.limit(1)
.getDocuments()
.then((doc) {
ref_value = doc.documents[0]['ref'];
});
this code may help you try out things further..
answered Nov 17 '18 at 9:48
UpaJahUpaJah
691312
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
0
you can get ref_value like this
await Firestore.instance
.collection('collection')
.where('ref', isEqualTo: 'what you want to query')
.getDocuments()
.then((doc) {
ref_value = doc.documents[0]['ref'];
});
get another with that reference
await Firestore.instance
.collection('collection')
.where('ref', isEqualTo: ref_value)
.limit(1)
.getDocuments()
.then((doc) {
ref_value = doc.documents[0]['ref'];
});
this code may help you try out things further..
answered Nov 17 '18 at 9:48
UpaJahUpaJah
691312
add a comment |
0
you can get ref_value like this
await Firestore.instance
.collection('collection')
.where('ref', isEqualTo: 'what you want to query')
.getDocuments()
.then((doc) {
ref_value = doc.documents[0]['ref'];
});
get another with that reference
await Firestore.instance
.collection('collection')
.where('ref', isEqualTo: ref_value)
.limit(1)
.getDocuments()
.then((doc) {
ref_value = doc.documents[0]['ref'];
});
this code may help you try out things further..
answered Nov 17 '18 at 9:48
UpaJahUpaJah
691312
add a comment |
0
0
0
you can get ref_value like this
await Firestore.instance
.collection('collection')
.where('ref', isEqualTo: 'what you want to query')
.getDocuments()
.then((doc) {
ref_value = doc.documents[0]['ref'];
});
get another with that reference
await Firestore.instance
.collection('collection')
.where('ref', isEqualTo: ref_value)
.limit(1)
.getDocuments()
.then((doc) {
ref_value = doc.documents[0]['ref'];
});
this code may help you try out things further..
answered Nov 17 '18 at 9:48
UpaJahUpaJah
691312
you can get ref_value like this
await Firestore.instance
.collection('collection')
.where('ref', isEqualTo: 'what you want to query')
.getDocuments()
.then((doc) {
ref_value = doc.documents[0]['ref'];
});
get another with that reference
await Firestore.instance
.collection('collection')
.where('ref', isEqualTo: ref_value)
.limit(1)
.getDocuments()
.then((doc) {
ref_value = doc.documents[0]['ref'];
});
this code may help you try out things further..
answered Nov 17 '18 at 9:48
UpaJahUpaJah
691312
answered Nov 17 '18 at 9:48
UpaJahUpaJah
691312
answered Nov 17 '18 at 9:48
UpaJahUpaJah
691312
answered Nov 17 '18 at 9:48
UpaJahUpaJah
691312
691312
add a comment |
add a comment |
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Kindly show some code or explain it in detail. What attribute document has and on what basis (it's id or any attribute) you wanna fetch data.
– Xar E Ahmer
Nov 14 '18 at 6:09
I would shown code if I know how to
– Folarin Opeyemi
Nov 14 '18 at 9:01
Doc A has fields in it stored as string data type. Doc B has a data type Ref, referencing to Doc A. What I want is get the fields stored in Doc A through Doc B.
– Folarin Opeyemi
Nov 14 '18 at 9:02
You have to call two services first to get the parameter. First call is to get the reference type and then call service again with orderBy filter on that reference and limit to 1 to get only single record
– Xar E Ahmer
Nov 14 '18 at 10:59
Call two services, as in two streambuilder?
– Folarin Opeyemi
Nov 14 '18 at 11:02