DropdownButton widget with Getx | Flutter | Dart

[@sohaibsadique2022]

ماشااللہ

[@Mm1mm2-f5g]

Nice video❤

[@Btnnewsbnn]

Good helpful dropdown example

[@yxrmm1]

DropdownButton good job

[@sohaibsadique2022]

❤❤❤❤

[@mkhankhn]

good about getx

[@Khan313xyz]

Drop down drop down example good

[@dartlanguagedart]

nice code

[@fahadislam8975]

i can do same thing but getting error

[@fahadislam8975]

════════ Exception caught by widgets library ═══════════════════════════════════
The following assertion was thrown building Obx(has builder, dirty, state: ObxState#90a06):
There should be exactly one item with [DropdownButton]'s value: some book type.
Either zero or 2 or more [DropdownMenuItem]s were detected with the same value
'package:flutter/src/material/dropdown.dart':
Failed assertion: line 948 pos 15: 'items == null || items.isEmpty || value == null ||
items.where((DropdownMenuItem item) {
return item.value == value;
}).length == 1'