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Adding Dart Objects to Firestore in Flutter

2 min read
#flutter #firebase
Adding Dart Objects to Firestore in Flutter

I had previously written an article on How to Load Data from Firestore into a ListView.

Add To Firestore with Automatic Id

In this article, we’ll learn How to add Data into a Firestore Collection without Using the Firebase Console UI.

It is quite simple. There is a function to add a document to a Collection in the Firestore Library. We can pass a Map to it and we are done.

Here’s an example.

FirebaseFirestore.instance.collection("collection-name").add({
  "title":"This is the value for Title",
  "content":"This is the Content"
});

But as told in my Latest post on Firestore listview, we can convert Firestore data into Dart Objects and Vice-versa.

Convert Dart Object to Map

For that, let’s create a Model class Like the previous Post.

class NoteModel{
  String title;
  String content;

  NoteModel({
    required this.title,
    required this.content,
  });
}

Next, we have to create a Function that Will convert this Object into a Map.

Map<String,dynamic> toMap(){
  return {
    "title":title,
    "content":content,
  };
}

Put the above Function Inside our Model Class and It’ll convert our Dart Object into a Map.

Adding to Firestore

With the second method, we can add Data to Firestore simply.

First, create An Instance of our Notes Class.

NoteModel noteToAdd = NoteModel(
  title:"This is an Awesome Title",
  content:"This is the Content of the Note",
);

Next, we can simply add the above note to Firestore.

NoteModel noteToAdd = NoteModel(
  title:"This is an Awesome Title",
  content:"This is the Content of the Note",
);

FirebaseFirestore.instance.collection("Notes").add(noteToAdd.toMap());

Add to Firestore With Custom Id

All the above methods will create an Automatic document Id for the document we add. But If we want to provide a custom Id for a document, we can do it easily.

NoteModel noteToAdd = NoteModel(
  title:"This is an Awesome Title",
  content:"This is the Content of the Note",
);

FirebaseFirestore.collection("notes").
  doc("your-desired-doc-id").
  set(noteModel.toMap());

The above code will create a document with the Id we provided.

Please Note when we use set, if there exists a document with the Same Id, It’ll be overwritten by the latest One.

Wrap

You can find more articles related to Firebase Here

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