I get this error after writing this code. Non-nullable instance field '_cardResults' must be initialized. Try adding an initializer expression, or add a field initializer in this constructor, or mark it. When I try to add the late initializer and…
I am trying to write a model but i keep getting this error. Here is the code. import 'package:flutter/material.dart'; class CardModel { late List<CardResults> results; CardModel({ required this.results}); CardModel.fromJson(Map<String, dynamic> json) { if (json['cardResults'] != null) { results = List<CardResults>();…
I would like to know how to sort values in mysql query. I have a table tasks and has column cost which can have null or number values other column status have 2703, 2702, 2701 Based on condition, the order…
Disclaimer: English is not my native tongue, but I'll try my best to explain the problem. In this image I have 2 Lists, top displays a list of PostModels and bottom a list of UserModels. Both of which are taken…
I have the following three table in laravel app purchases table id, name, price Products table id, purchase_id, price sales table id, product_id, quantity, total-price The sales table belongs to products table refers product id while products table belong to…
This is the data I have obtained from an excel sheet and I want to create firestore documents with the same id of kdocID variables and populate it's content from the remaining arrays: List<String> kdocID = [ '5846', '5846', '5845',…
I am using codeigniter 4. I want to sum this data from my model. pow(data_training.area-avg(area),2) so I type like this : sum(pow(data_training.area-avg(area),2)) but it's turn out like this: error screenshot Please tell me how to sum the data values. Here…
I am trying to call this method but TempReceiptModel.fromJSON is not being called. Future<TempReceiptModel?> getTempReceipt({ required UserModel? user, }) async { TempReceiptModel? tempReceipt; try { // print(tempReceipt.) SharedPreferences prefs = await SharedPreferences.getInstance(); String? accessToken = prefs.getString('accesstoken'); String? userID = user?.user_id;…
I Newbie and am trying to learn Laravel, and I am doing some exercises for Laravel's main functions. I have created a Dashboard where users can add their own posts, however I have noticed that when I open the page…
I am unable to store the value in the database using the register form I have tried different ways like changing routes controllers here is my Student.php model <?php namespace AppModels; use IlluminateDatabaseEloquentFactoriesHasFactory; use IlluminateDatabaseEloquentModel; class Student extends Model {…