Mixing
Flutter Firestore - How To Read And Write Arrays of Objects
So I've been struggling with reading and writing arrays of objects in Firestore using Flutter. For writing, the array never gets updated in Firestore and I don't know why. I've tried:
.updateData({"tasks": FieldValue.arrayUnion(taskList.tasks)});
and
.updateData(taskList.toMap());
but neither seem to do anything.
For reading, I usually get the error type 'List<dynamic>' is not a subtype of type 'List<Task>'. I'm pretty sure it has something to do with my class structure but I can't figure it out. I've tried many different ways to get the data as a List of Tasks but all attempts have failed. Here is my current broken code:
TaskList.dart
class TaskList {
String name;
List<Task> tasks;
TaskList(this.name, this.tasks);
Map<String, dynamic> toMap() => {'name': name, 'tasks': tasks};
TaskList.fromSnapshot(DocumentSnapshot snapshot)
: name = snapshot['name'],
tasks = snapshot['tasks'].map((item) {
return Task.fromMap(item);
}).toList();
}
Task.dart
class Task {
String task;
bool checked;
Task(this.task, this.checked);
Map<String, dynamic> toMap() => {
'task': task,
'checked': checked,
};
Task.fromMap(Map<dynamic, dynamic> map)
: task = map['task'],
checked = map['checked'];
}
Any help or advice is appreciated!
firebase dart
flutter google-cloud-firestore asked Jan 2 at 19:24
JaredJared
270119
add a comment |
So I've been struggling with reading and writing arrays of objects in Firestore using Flutter. For writing, the array never gets updated in Firestore and I don't know why. I've tried:
.updateData({"tasks": FieldValue.arrayUnion(taskList.tasks)});
and
.updateData(taskList.toMap());
but neither seem to do anything.
For reading, I usually get the error type 'List<dynamic>' is not a subtype of type 'List<Task>'. I'm pretty sure it has something to do with my class structure but I can't figure it out. I've tried many different ways to get the data as a List of Tasks but all attempts have failed. Here is my current broken code:
TaskList.dart
class TaskList {
String name;
List<Task> tasks;
TaskList(this.name, this.tasks);
Map<String, dynamic> toMap() => {'name': name, 'tasks': tasks};
TaskList.fromSnapshot(DocumentSnapshot snapshot)
: name = snapshot['name'],
tasks = snapshot['tasks'].map((item) {
return Task.fromMap(item);
}).toList();
}
Task.dart
class Task {
String task;
bool checked;
Task(this.task, this.checked);
Map<String, dynamic> toMap() => {
'task': task,
'checked': checked,
};
Task.fromMap(Map<dynamic, dynamic> map)
: task = map['task'],
checked = map['checked'];
}
Any help or advice is appreciated!
firebase dart
flutter google-cloud-firestore asked Jan 2 at 19:24
JaredJared
270119
have a look at this answer please stackoverflow.com/a/53149420/2863386
– Shyju Madathil
Jan 3 at 6:24
add a comment |
So I've been struggling with reading and writing arrays of objects in Firestore using Flutter. For writing, the array never gets updated in Firestore and I don't know why. I've tried:
.updateData({"tasks": FieldValue.arrayUnion(taskList.tasks)});
and
.updateData(taskList.toMap());
but neither seem to do anything.
For reading, I usually get the error type 'List<dynamic>' is not a subtype of type 'List<Task>'. I'm pretty sure it has something to do with my class structure but I can't figure it out. I've tried many different ways to get the data as a List of Tasks but all attempts have failed. Here is my current broken code:
TaskList.dart
class TaskList {
String name;
List<Task> tasks;
TaskList(this.name, this.tasks);
Map<String, dynamic> toMap() => {'name': name, 'tasks': tasks};
TaskList.fromSnapshot(DocumentSnapshot snapshot)
: name = snapshot['name'],
tasks = snapshot['tasks'].map((item) {
return Task.fromMap(item);
}).toList();
}
Task.dart
class Task {
String task;
bool checked;
Task(this.task, this.checked);
Map<String, dynamic> toMap() => {
'task': task,
'checked': checked,
};
Task.fromMap(Map<dynamic, dynamic> map)
: task = map['task'],
checked = map['checked'];
}
Any help or advice is appreciated!
firebase dart
flutter google-cloud-firestore asked Jan 2 at 19:24
JaredJared
270119
So I've been struggling with reading and writing arrays of objects in Firestore using Flutter. For writing, the array never gets updated in Firestore and I don't know why. I've tried:
.updateData({"tasks": FieldValue.arrayUnion(taskList.tasks)});
and
.updateData(taskList.toMap());
but neither seem to do anything.
For reading, I usually get the error type 'List<dynamic>' is not a subtype of type 'List<Task>'. I'm pretty sure it has something to do with my class structure but I can't figure it out. I've tried many different ways to get the data as a List of Tasks but all attempts have failed. Here is my current broken code:
TaskList.dart
class TaskList {
String name;
List<Task> tasks;
TaskList(this.name, this.tasks);
Map<String, dynamic> toMap() => {'name': name, 'tasks': tasks};
TaskList.fromSnapshot(DocumentSnapshot snapshot)
: name = snapshot['name'],
tasks = snapshot['tasks'].map((item) {
return Task.fromMap(item);
}).toList();
}
Task.dart
class Task {
String task;
bool checked;
Task(this.task, this.checked);
Map<String, dynamic> toMap() => {
'task': task,
'checked': checked,
};
Task.fromMap(Map<dynamic, dynamic> map)
: task = map['task'],
checked = map['checked'];
}
Any help or advice is appreciated!
firebase dart
flutter google-cloud-firestore firebase dart
flutter google-cloud-firestore asked Jan 2 at 19:24
JaredJared
270119
asked Jan 2 at 19:24
JaredJared
270119
asked Jan 2 at 19:24
JaredJared
270119
asked Jan 2 at 19:24
JaredJared
270119
asked Jan 2 at 19:24
JaredJared
270119
270119
have a look at this answer please stackoverflow.com/a/53149420/2863386
– Shyju Madathil
Jan 3 at 6:24
add a comment |
have a look at this answer please stackoverflow.com/a/53149420/2863386
– Shyju Madathil
Jan 3 at 6:24
have a look at this answer please stackoverflow.com/a/53149420/2863386
– Shyju Madathil
Jan 3 at 6:24
have a look at this answer please stackoverflow.com/a/53149420/2863386
– Shyju Madathil
Jan 3 at 6:24
add a comment |
1 Answer
1
active
oldest
votes
I ended up making the tasks list of type dynamic and that solved most of my reading problems. Still don't understand why though.
List<Task> tasks;
And for writing, I just changed the fromMap() to toMap() for initializing the tasks.
'tasks': tasks.map((item) {
return item.toMap();
}).toList(),
answered Jan 3 at 5:51
JaredJared
270119
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
I ended up making the tasks list of type dynamic and that solved most of my reading problems. Still don't understand why though.
List<Task> tasks;
And for writing, I just changed the fromMap() to toMap() for initializing the tasks.
'tasks': tasks.map((item) {
return item.toMap();
}).toList(),
answered Jan 3 at 5:51
JaredJared
270119
add a comment |
I ended up making the tasks list of type dynamic and that solved most of my reading problems. Still don't understand why though.
List<Task> tasks;
And for writing, I just changed the fromMap() to toMap() for initializing the tasks.
'tasks': tasks.map((item) {
return item.toMap();
}).toList(),
answered Jan 3 at 5:51
JaredJared
270119
add a comment |
I ended up making the tasks list of type dynamic and that solved most of my reading problems. Still don't understand why though.
List<Task> tasks;
And for writing, I just changed the fromMap() to toMap() for initializing the tasks.
'tasks': tasks.map((item) {
return item.toMap();
}).toList(),
answered Jan 3 at 5:51
JaredJared
270119
I ended up making the tasks list of type dynamic and that solved most of my reading problems. Still don't understand why though.
List<Task> tasks;
And for writing, I just changed the fromMap() to toMap() for initializing the tasks.
'tasks': tasks.map((item) {
return item.toMap();
}).toList(),
answered Jan 3 at 5:51
JaredJared
270119
answered Jan 3 at 5:51
JaredJared
270119
answered Jan 3 at 5:51
JaredJared
270119
answered Jan 3 at 5:51
JaredJared
270119
270119
add a comment |
add a comment |
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have a look at this answer please stackoverflow.com/a/53149420/2863386
– Shyju Madathil
Jan 3 at 6:24