CakePHP数据库连接“ Mysql”丢失，或无法创建。 core.php和bootstrap.php

Question

I have looked for answers before I posted this question, and it seems like the problem is in core.php or bootstrap.php file. I've seen someone said that I need to change prefixes or something like that, but I don't understand what exactly I should change them to. Can someone help me please? Here is the error page:

Database connection "Mysql" is missing, or could not be created. Error: An Internal Error Has Occurred.

Stack Trace
CORE/Cake/Model/Datasource/DboSource.php line 260 → Mysql->connect()
CORE/Cake/Model/ConnectionManager.php line 105 → DboSource->__construct(array)
CORE/Cake/Model/Model.php line 3476 → ConnectionManager::getDataSource(string)
CORE/Cake/Model/Model.php line 1126 → Model->setDataSource(string)
CORE/Cake/Model/Model.php line 3498 → Model->setSource(string)
CORE/Cake/Model/Model.php line 1355 → Model->getDataSource()
CORE/Cake/View/Helper/FormHelper.php line 207 → Model->schema()
CORE/Cake/View/Helper/FormHelper.php line 459 → FormHelper->_introspectModel(string, string)
APP/View/Layouts/default.ctp line 85 → FormHelper->create(string, array)
CORE/Cake/View/View.php line 935 → include(string)
CORE/Cake/View/View.php line 897 → View->_evaluate(string, array)
CORE/Cake/View/View.php line 529 → View->_render(string)
CORE/Cake/View/View.php line 474 → View->renderLayout(string, string)
CORE/Cake/Controller/Controller.php line 952 → View->render(string, null)
APP/Controller/PagesController.php line 69 → Controller->render(string)
[internal function] → PagesController->display(string)
CORE/Cake/Controller/Controller.php line 490 → ReflectionMethod->invokeArgs(PagesController, array)
CORE/Cake/Routing/Dispatcher.php line 185 → Controller->invokeAction(CakeRequest)
CORE/Cake/Routing/Dispatcher.php line 160 → Dispatcher->_invoke(PagesController, CakeRequest, CakeResponse)
APP/webroot/index.php line 108 → Dispatcher->dispatch(CakeRequest, CakeResponse)

Answer 1

Have you the proper connection between the site and the database? The only reason I can think of for this issue. Check you're configuration settings in the database.php file