Flutter Firestore FutureBuilder filter with if statement
0
I'm trying to filter a list of a FutureBuilder as follows:
return new FutureBuilder(
future: Firestore.instance
.collection('user')
.getDocuments(),
builder: (BuildContext context, AsyncSnapshot snapshot2) {
if (snapshot2.hasData) {
if (snapshot2.data != null) {
return new Column(
children: <Widget>[
new Expanded(
child: new ListView(
children: snapshot2.data.documents
.map<Widget>((DocumentSnapshot document) {
if(document['first_name'] == 'James') {
return new FindFollowerWidget(
name: document['first_name'] + " " + document['last_name'],
username: document['username'],
);
}
}).toList(),
),
),
],
);
}
}else {
return new CircularProgressIndicator();
}
});
This FutureBuilder works when I remove the if statement; however, when I include the following if statement it Flutter throws an error:
new ListView(
children: snapshot2.data.documents.map<Widget>((DocumentSnapshot document) {
if(document['first_name'] == 'James') {
return new FindFollowerWidget(
name: document['first_name'] + " " + document['last_name'],
username: document['username'],
);
}
).toList(),
),
My question: how can I only return the FindFollowerWidget when a document snapshot field has a specific value (in this case the first name being "James"?
Thanks!
flutter google-cloud-firestore asked Nov 23 '18 at 18:55
PJQuakJagPJQuakJag
629
add a comment |
0
I'm trying to filter a list of a FutureBuilder as follows:
return new FutureBuilder(
future: Firestore.instance
.collection('user')
.getDocuments(),
builder: (BuildContext context, AsyncSnapshot snapshot2) {
if (snapshot2.hasData) {
if (snapshot2.data != null) {
return new Column(
children: <Widget>[
new Expanded(
child: new ListView(
children: snapshot2.data.documents
.map<Widget>((DocumentSnapshot document) {
if(document['first_name'] == 'James') {
return new FindFollowerWidget(
name: document['first_name'] + " " + document['last_name'],
username: document['username'],
);
}
}).toList(),
),
),
],
);
}
}else {
return new CircularProgressIndicator();
}
});
This FutureBuilder works when I remove the if statement; however, when I include the following if statement it Flutter throws an error:
new ListView(
children: snapshot2.data.documents.map<Widget>((DocumentSnapshot document) {
if(document['first_name'] == 'James') {
return new FindFollowerWidget(
name: document['first_name'] + " " + document['last_name'],
username: document['username'],
);
}
).toList(),
),
My question: how can I only return the FindFollowerWidget when a document snapshot field has a specific value (in this case the first name being "James"?
Thanks!
flutter google-cloud-firestore asked Nov 23 '18 at 18:55
PJQuakJagPJQuakJag
629
which if statement , you have used three if statement .?
– anmol.majhail
Nov 23 '18 at 19:12
removesnapshot2.data != null. Isn't necessary .
– Rubens Melo
Nov 23 '18 at 19:29
@anmol.majhail Edited to add clarity. The question is about the if statement within the ListView. Would love any thoughts you have about how to get this to work!
– PJQuakJag
Nov 23 '18 at 19:44
Use ListView.builder you can run the if Statement in the itemBuilder.
– anmol.majhail
Nov 23 '18 at 19:48
add a comment |
0
0
0
I'm trying to filter a list of a FutureBuilder as follows:
return new FutureBuilder(
future: Firestore.instance
.collection('user')
.getDocuments(),
builder: (BuildContext context, AsyncSnapshot snapshot2) {
if (snapshot2.hasData) {
if (snapshot2.data != null) {
return new Column(
children: <Widget>[
new Expanded(
child: new ListView(
children: snapshot2.data.documents
.map<Widget>((DocumentSnapshot document) {
if(document['first_name'] == 'James') {
return new FindFollowerWidget(
name: document['first_name'] + " " + document['last_name'],
username: document['username'],
);
}
}).toList(),
),
),
],
);
}
}else {
return new CircularProgressIndicator();
}
});
This FutureBuilder works when I remove the if statement; however, when I include the following if statement it Flutter throws an error:
new ListView(
children: snapshot2.data.documents.map<Widget>((DocumentSnapshot document) {
if(document['first_name'] == 'James') {
return new FindFollowerWidget(
name: document['first_name'] + " " + document['last_name'],
username: document['username'],
);
}
).toList(),
),
My question: how can I only return the FindFollowerWidget when a document snapshot field has a specific value (in this case the first name being "James"?
Thanks!
flutter google-cloud-firestore asked Nov 23 '18 at 18:55
PJQuakJagPJQuakJag
629
I'm trying to filter a list of a FutureBuilder as follows:
return new FutureBuilder(
future: Firestore.instance
.collection('user')
.getDocuments(),
builder: (BuildContext context, AsyncSnapshot snapshot2) {
if (snapshot2.hasData) {
if (snapshot2.data != null) {
return new Column(
children: <Widget>[
new Expanded(
child: new ListView(
children: snapshot2.data.documents
.map<Widget>((DocumentSnapshot document) {
if(document['first_name'] == 'James') {
return new FindFollowerWidget(
name: document['first_name'] + " " + document['last_name'],
username: document['username'],
);
}
}).toList(),
),
),
],
);
}
}else {
return new CircularProgressIndicator();
}
});
This FutureBuilder works when I remove the if statement; however, when I include the following if statement it Flutter throws an error:
new ListView(
children: snapshot2.data.documents.map<Widget>((DocumentSnapshot document) {
if(document['first_name'] == 'James') {
return new FindFollowerWidget(
name: document['first_name'] + " " + document['last_name'],
username: document['username'],
);
}
).toList(),
),
My question: how can I only return the FindFollowerWidget when a document snapshot field has a specific value (in this case the first name being "James"?
Thanks!
flutter google-cloud-firestore flutter google-cloud-firestore asked Nov 23 '18 at 18:55
PJQuakJagPJQuakJag
629
asked Nov 23 '18 at 18:55
PJQuakJagPJQuakJag
629
edited Nov 23 '18 at 19:43
PJQuakJag
asked Nov 23 '18 at 18:55
PJQuakJagPJQuakJag
629
asked Nov 23 '18 at 18:55
PJQuakJagPJQuakJag
629
asked Nov 23 '18 at 18:55
PJQuakJagPJQuakJag
629
629
which if statement , you have used three if statement .?
– anmol.majhail
Nov 23 '18 at 19:12
removesnapshot2.data != null. Isn't necessary .
– Rubens Melo
Nov 23 '18 at 19:29
@anmol.majhail Edited to add clarity. The question is about the if statement within the ListView. Would love any thoughts you have about how to get this to work!
– PJQuakJag
Nov 23 '18 at 19:44
Use ListView.builder you can run the if Statement in the itemBuilder.
– anmol.majhail
Nov 23 '18 at 19:48
add a comment |
which if statement , you have used three if statement .?
– anmol.majhail
Nov 23 '18 at 19:12
removesnapshot2.data != null. Isn't necessary .
– Rubens Melo
Nov 23 '18 at 19:29
@anmol.majhail Edited to add clarity. The question is about the if statement within the ListView. Would love any thoughts you have about how to get this to work!
– PJQuakJag
Nov 23 '18 at 19:44
Use ListView.builder you can run the if Statement in the itemBuilder.
– anmol.majhail
Nov 23 '18 at 19:48
which if statement , you have used three if statement .?
– anmol.majhail
Nov 23 '18 at 19:12
which if statement , you have used three if statement .?
– anmol.majhail
Nov 23 '18 at 19:12
remove
snapshot2.data != null . Isn't necessary .– Rubens Melo
Nov 23 '18 at 19:29
remove
snapshot2.data != null . Isn't necessary .– Rubens Melo
Nov 23 '18 at 19:29
@anmol.majhail Edited to add clarity. The question is about the if statement within the ListView. Would love any thoughts you have about how to get this to work!
– PJQuakJag
Nov 23 '18 at 19:44
@anmol.majhail Edited to add clarity. The question is about the if statement within the ListView. Would love any thoughts you have about how to get this to work!
– PJQuakJag
Nov 23 '18 at 19:44
Use ListView.builder you can run the if Statement in the itemBuilder.
– anmol.majhail
Nov 23 '18 at 19:48
Use ListView.builder you can run the if Statement in the itemBuilder.
– anmol.majhail
Nov 23 '18 at 19:48
add a comment |
1 Answer
1
active
oldest
votes
2
I'm not so sure about what you are asking. Probably List.where() method?
snapshot2.data.document
.where((document)=>document["first_name"]=="James")
.map((document)=>FindFollowerWidget(...))
.toList();
answered Nov 23 '18 at 19:48
First_StrikeFirst_Strike
1229
add a comment |
Your Answer
StackExchange.ifUsing("editor", function () {
StackExchange.using("externalEditor", function () {
StackExchange.using("snippets", function () {
StackExchange.snippets.init();
});
});
}, "code-snippets");
StackExchange.ready(function() {
var channelOptions = {
tags: "".split(" "),
id: "1"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);
StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
}
});
function createEditor() {
StackExchange.prepareEditor({
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: true,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: 10,
bindNavPrevention: true,
postfix: "",
imageUploader: {
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
},
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
});
}
});
draft saved
draft discarded
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53451737%2fflutter-firestore-futurebuilder-filter-with-if-statement%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
2
I'm not so sure about what you are asking. Probably List.where() method?
snapshot2.data.document
.where((document)=>document["first_name"]=="James")
.map((document)=>FindFollowerWidget(...))
.toList();
answered Nov 23 '18 at 19:48
First_StrikeFirst_Strike
1229
add a comment |
2
I'm not so sure about what you are asking. Probably List.where() method?
snapshot2.data.document
.where((document)=>document["first_name"]=="James")
.map((document)=>FindFollowerWidget(...))
.toList();
answered Nov 23 '18 at 19:48
First_StrikeFirst_Strike
1229
add a comment |
2
2
2
I'm not so sure about what you are asking. Probably List.where() method?
snapshot2.data.document
.where((document)=>document["first_name"]=="James")
.map((document)=>FindFollowerWidget(...))
.toList();
answered Nov 23 '18 at 19:48
First_StrikeFirst_Strike
1229
I'm not so sure about what you are asking. Probably List.where() method?
snapshot2.data.document
.where((document)=>document["first_name"]=="James")
.map((document)=>FindFollowerWidget(...))
.toList();
answered Nov 23 '18 at 19:48
First_StrikeFirst_Strike
1229
answered Nov 23 '18 at 19:48
First_StrikeFirst_Strike
1229
answered Nov 23 '18 at 19:48
First_StrikeFirst_Strike
1229
answered Nov 23 '18 at 19:48
First_StrikeFirst_Strike
1229
1229
add a comment |
add a comment |
draft saved
draft discarded
Thanks for contributing an answer to Stack Overflow!
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
draft saved
draft discarded
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53451737%2fflutter-firestore-futurebuilder-filter-with-if-statement%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
which if statement , you have used three if statement .?
– anmol.majhail
Nov 23 '18 at 19:12
remove
snapshot2.data != null. Isn't necessary .– Rubens Melo
Nov 23 '18 at 19:29
@anmol.majhail Edited to add clarity. The question is about the if statement within the ListView. Would love any thoughts you have about how to get this to work!
– PJQuakJag
Nov 23 '18 at 19:44
Use ListView.builder you can run the if Statement in the itemBuilder.
– anmol.majhail
Nov 23 '18 at 19:48