Using Yii 2 is really easy, but for a newbie sometimes the Gii (i.e. the code generator helper tool) may generate a code, which only the index page works and the other pages like view, update generates a strange error of missing ID (note it is capitalized ID):
Bad Request (#400) Missing required parameters: ID The above error occurred while the Web server was processing your request. Please contact us if you think this is a server error. Thank you.
SCREENSHOT 1) Just viewing an item generates the error of a bad request.
Here is the tracing log:
error yii\web\HttpException:400 yii\web\BadRequestHttpException: Missing required parameters: ID in /home/myuser/projects/test-web/vendor/yiisoft/yii2/web/Controller.php:202
Stack trace:
#0 /home/myuser/projects/test-web/vendor/yiisoft/yii2/base/InlineAction.php(51): yii\web\Controller->bindActionParams()
#1 /home/myuser/projects/test-web/vendor/yiisoft/yii2/base/Controller.php(178): yii\base\InlineAction->runWithParams()
#2 /home/myuser/projects/test-web/vendor/yiisoft/yii2/base/Module.php(552): yii\base\Controller->runAction()
#3 /home/myuser/projects/test-web/vendor/yiisoft/yii2/web/Application.php(103): yii\base\Module->runAction()
#4 /home/myuser/projects/test-web/vendor/yiisoft/yii2/base/Application.php(384): yii\web\Application->handleRequest()
#5 /home/myuser/projects/test-web/web/index.php(12): yii\base\Application->run()
#6 {main}
Probably, the problem is in the Controller class of the route you are trying to view. For example, the above URL is http://localhost:8888/odd-type/view?id=1 the route is /odd-type/view and apparently, the OddTypeController class may not find the ID parameter.
SCREENSHOT 2) The function actionView has the parameter $ID, which is used in the function findModel($ID).
SCREENSHOT 3) There are three more functions actionUpdate, actionDelete and the third is below.
SCREENSHOT 4) The last function with capitalized $ID, which must be $id.
The solution is to open the controller class of the route, which in this case is OddTypeController, and make all function parameters from capitalized $ID to $id. Save the file and it won’t give this error anymore.
SCREENSHOT 5) Replace the two occurrences of $ID with $id as shown. Do it for all of the above functions – actionView, actionUpdate, actionDelete, and findModel.
The capitalized $ID must be replaced with $id in all of the functions – actionView, actionUpdate, actionDelete, and findModel. Note, the parameter variable $id is used in the functions’ bodies, so replace it with the correct one in the functions’ bodies, too.
Yii 2 Debug Toolbar tracing the error to the Controller class.
Here is a screenshot with an open debug toolbar, which shows a trace of the error.
