i want to get the image link in firestore - flutter

Question

i want to get the image link in database, but i get the image url in other document and (name & etc) in other document.
database.collection("car").add({
"item Name": nameText.text,
"item Price": priceText.text,
"seller Number": cellNoText.text,
"seller add": addText.text,
"image 1 Url": await uploadPic()
.then((value) async {
DocumentReference docRef = Firestore
.instance
.collection("car")
.document();
await docRef.setData(
{"image 1 Url": value},
merge: true);
}),
});
this is the function to upload the image to firebase storage
uploadPic() async {
String fileName = path.basename(_image1.path);
StorageReference reference = storage.ref().child(fileName);
StorageUploadTask uploadTask = reference.putFile(_image1);
StorageTaskSnapshot taskSnapshot = await uploadTask.onComplete;
String url = await taskSnapshot.ref.getDownloadURL();
imageUrl1 = url;
return url;
}
can you guys help?

Answer 1

Your image url has been created in the wrong location because of the then of the uploadPic(), and its null in the car document because you need to call the Future function before adding it to the document:
Future uploadPic() async {
String fileName = path.basename(_image1.path);
StorageReference reference = storage.ref().child(fileName);
StorageUploadTask uploadTask = reference.putFile(_image1);
StorageTaskSnapshot taskSnapshot = await uploadTask.onComplete;
String url = await taskSnapshot.ref.getDownloadURL();
return url;
}
Future saveData() async {
String imageUrl = await uploadPic(); //calling and adding the result to a variable before adding
database.collection("car").add({
"item Name": nameText.text,
"item Price": priceText.text,
"seller Number": cellNoText.text,
"seller add": addText.text,
"imageUrl": imageUrl,
});
}