Flutter) Firestore problem "Nested arrays are not supported."

Question

I got the following Json data through the drawing-related library.

                            {
                              "bounds": {"width": 525.0, "height": 735.0},
                              "paths": [
                               // draw line 
                                [
                                  {"x": 470.0, "y": 98.0, "t": 1657102762880}
                                  {"x": 470.0, "y": 98.0, "t": 1657102762880}
                                ],
                                [
                                  {"x": 470.0, "y": 98.0, "t": 1657102762880}
                                ]
                              ],
                              "threshold": 0.01,
                              "smoothRatio": 0.65,
                              "velocityRange": 2.0
                            }

And I'm going to upload this data to firestore. (To upload drawing data and load it later)

However, when I upload it to Firestore, the following error is printed

Nested arrays are not supported.

Here's the code I tried

                    await FirebaseFirestore.instance
                            .collection(COL_ROOMS)
                            .doc(widget.roomKey)
                            .collection(COL_DRAW)
                            .doc()
                            .set({
                              "bounds": {"width": 525.0, "height": 735.0},
                              "paths": [
                                [
                                  {"x": 470.0, "y": 98.0, "t": 1657102762880}
                                ]
                              ],
                              "threshold": 0.01,
                              "smoothRatio": 0.65,
                              "velocityRange": 2.0
                            })
                            .then((value) => logger.d("upload"))
                            .catchError((error) => logger.e(error));

Can I know a good way to solve this problem?

What do you mean by "turning off"? Crashing? Do you have any logs? Have you initialized your app by using await Firebase.initializeApp()? — mfkw1
– mfkw1, Commented Jul 6, 2022 at 13:30
When an Android app crashes, it writes an error message and stack trace to its logcat. Please find those, and add them to your question by clicking the edit link under it. Also see stackoverflow.com/questions/23353173/… and stackoverflow.com/questions/3988788/… — Frank van Puffelen
– Frank van Puffelen, Commented Jul 6, 2022 at 14:08
I checked the error message "Nested arrays are not supported." . I'll correct the post — Kevin Yang
– Kevin Yang, Commented Jul 7, 2022 at 0:43

Yayo Arellano · Accepted Answer · 2022-07-07 06:16:51Z

2

The problem is in the paths field.

"paths": [
   [
     {"x": 470.0, "y": 98.0, "t": 1657102762880}
   ]
 ]

You have an array of arrays, this is not supported by Firestore.

If you just want to store the data, you can try to store it as a String.

// Covert to string
final dataAsString = json.encode({
    "bounds": {"width": 525.0, "height": 735.0},
    "paths": [
      [
        {"x": 470.0, "y": 98.0, "t": 1657102762880}
      ]
    ],
    "threshold": 0.01,
    "smoothRatio": 0.65,
    "velocityRange": 2.0
  });

// Convert to Map
final dataAsMap = json.decode(dataAsString);

answered Jul 7, 2022 at 6:16

Yayo Arellano

3,91427 silver badges29 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

Flutter) Firestore problem "Nested arrays are not supported."

1 Answer 1

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related