How assign object correctly flutter - flutter

Question

Hello i'm working on flutter project .
I have a class :
class Data {
RevisionInProgress revisionInProgress;
Data({this.revisionInProgress});
Data.fromJson(Map<String, dynamic> json) {
revisionInProgress = json['revision in progress'] != null
? new RevisionInProgress.fromJson(json['revision in progress'])
: null;
}
Map<String, dynamic> toJson() {
final Map<String, dynamic> data = new Map<String, dynamic>();
if (this.revisionInProgress != null) {
data['revision in progress'] = this.revisionInProgress.toJson();
}
return data;
}
}
class Datum {
int id;
int boxId;
int userId;
String revisionType;
String revisionDate;
String revisionLocation;
String revisionTitle;
int kilometragePourVidange;
int repeatRevision;
int revisionStatus;
String kilometrageLastVidange;
int kilometrageRevision;
String createdAt;
String updatedAt;
Datum(
{this.id,
this.boxId,
this.userId,
this.revisionType,
this.revisionDate,
this.revisionLocation,
this.revisionTitle,
this.kilometragePourVidange,
this.repeatRevision,
this.revisionStatus,
this.kilometrageLastVidange,
this.kilometrageRevision,
this.createdAt,
this.updatedAt});
Datum.fromJson(Map<String, dynamic> json) {
id = json['id'];
boxId = json['box_id'];
userId = json['user_id'];
revisionType = json['revision_type'];
revisionDate = json['revision_date'];
revisionLocation = json['revision_location'];
revisionTitle = json['revision_title'];
kilometragePourVidange = json['kilometrage_pour_vidange'];
repeatRevision = json['repeat_revision'];
revisionStatus = json['revision_status'];
kilometrageLastVidange = json['kilometrage_last_vidange'];
kilometrageRevision = json['Kilometrage_revision'];
createdAt = json['created_at'];
updatedAt = json['updated_at'];
}
Map<String, dynamic> toJson() {
final Map<String, dynamic> data = new Map<String, dynamic>();
data['id'] = this.id;
data['box_id'] = this.boxId;
data['user_id'] = this.userId;
data['revision_type'] = this.revisionType;
data['revision_date'] = this.revisionDate;
data['revision_location'] = this.revisionLocation;
data['revision_title'] = this.revisionTitle;
data['kilometrage_pour_vidange'] = this.kilometragePourVidange;
data['repeat_revision'] = this.repeatRevision;
data['revision_status'] = this.revisionStatus;
data['kilometrage_last_vidange'] = this.kilometrageLastVidange;
data['Kilometrage_revision'] = this.kilometrageRevision;
data['created_at'] = this.createdAt;
data['updated_at'] = this.updatedAt;
return data;
}
}
After assigning values:
Datum datum = Datum();
void setRevision() async {
print(_EmplacementController.text);
print(_DateController.text);
print(status.toString());
if (_formKey.currentState.validate()) {
datum.revisionType = status.toString();
datum.revisionTitle = _eventController.text;
datum.revisionDate = _DateController.text;
datum.revisionLocation = _EmplacementController.text;
datum.kilometragePourVidange = num.parse(_KilometrageController.text);
datum.repeatRevision = status1;
datum.kilometrageRevision =
num.parse(_Kilometrage_revisionController.text);
print(datum.revisionDate);
print(datum.revisionLocation);
revisionApi
.setRevision(
datum.revisionTitle,
datum.revisionType,
datum.revisionDate,
datum.revisionLocation,
datum.repeatRevision,
datum.kilometrageRevision,
datum.kilometragePourVidange,
)
.then((data) {
if (data != null) {
}
}).catchError((error) {
ScaffoldMessenger.of(context)
.showSnackBar(SnackBar(content: Text(error.toString())));
});
setState(() {});
Navigator.pop(context);
//
}
}
My problem is when i inspect _EmplacementController.text before assign => it show me the correct value . but if i inspect datum.revisionDate after assign ==> it show me nothing .
datum.revisionDate ==> empty
datum.revisionLocation ==> empty
How i can correct it ?
thanks in advance

Answer 1

If your form is validated then you have to save the form.
bool _validateAndSaveForm() {
final form = _formKey.currentState;
if (form.validate()) {
form.save();
return true;
}
return false;
}
if (_validateAndSaveForm()) {
datum.revisionType = status.toString();
datum.revisionTitle = _eventController.text;
datum.revisionDate = _DateController.text;
datum.revisionLocation = _EmplacementController.text;
datum.kilometragePourVidange = num.parse(_KilometrageController.text);
datum.repeatRevision = status1;
datum.kilometrageRevision =
num.parse(_Kilometrage_revisionController.text);