{"record":{"id":"f1757dc85e704a54","repo":"cakephp/cakephp","slug":"could-not-render-cell-s-s-line-d","errorCode":null,"errorMessage":"Could not render cell - %s [%s, line %d]","messagePattern":"Could not render cell - (.+?) \\[(.+?), line (.+?)\\]","errorType":"exception","errorClass":"Error","httpStatus":null,"severity":"error","filePath":"src/View/Cell.php","lineNumber":297,"sourceCode":"     * @return string Rendered cell\n     * @throws \\Error Include error details for PHP 7 fatal errors.\n     */\n    public function __toString(): string\n    {\n        try {\n            return $this->render();\n        } catch (Exception $e) {\n            trigger_error(sprintf(\n                'Could not render cell - %s [%s, line %d]',\n                $e->getMessage(),\n                $e->getFile(),\n                $e->getLine(),\n            ), E_USER_WARNING);\n\n            return '';\n        /** @phpstan-ignore-next-line */\n        } catch (Error $e) {\n            throw new Error(sprintf(\n                'Could not render cell - %s [%s, line %d]',\n                $e->getMessage(),\n                $e->getFile(),\n                $e->getLine(),\n            ), 0, $e);\n        }\n    }\n\n    /**\n     * Debug info.\n     *\n     * @return array<string, mixed>\n     */\n    public function __debugInfo(): array\n    {\n        return [\n            'action' => $this->action,\n            'args' => $this->args,","sourceCodeStart":279,"sourceCodeEnd":315,"githubUrl":"https://github.com/cakephp/cakephp/blob/1128eba9b09f1946df684811350e26f2cef68fac/src/View/Cell.php#L279-L315","documentation":"Cell::__toString() renders the cell; any uncaught PHP Error (TypeError, Error, etc.) during rendering is wrapped and rethrown as a new Error prefixed with 'Could not render cell -' including the original message, file, and line, with the original error chained as $previous. This surfaces underlying bugs (in the cell action or template) with cell context.","triggerScenarios":"Any PHP Error thrown inside a cell action or its template during string conversion — e.g. calling a method on null (TypeError), undefined method, or a template syntax causing an Error; echoing a cell whose action throws an Error.","commonSituations":"Template calling a variable's method when the variable was never set; type errors in cell action code; PHP version incompatibilities in templates; chasing the root cause requires reading the chained previous exception.","solutions":["Read the original message/file/line in the wrapped text and fix the underlying Error in the cell action or template","Inspect $e->getPrevious() in your error handler for the original stack trace","Null-check/validate data passed to the cell and set() inside the action","Temporarily render the cell via render() directly instead of echo to get a normal stack trace"],"exampleFix":"// before\n// template: <?= $items->count() ?> but $items is null\n// after\npublic function display()\n{\n    $this->set('items', $this->fetchTable('Items')->find('all')->all() ?? []);\n}","handlingStrategy":"try-catch","validationCode":null,"typeGuard":null,"tryCatchPattern":"try {\n    $cell = $this->cell('Cart');\n    echo $cell;\n} catch (Error $e) {\n    $previous = $e->getPrevious();\n    Log::error('Cell render failed: ' . ($previous?->getMessage() ?? $e->getMessage()));\n    echo '';\n}","preventionTips":["Always inspect getPrevious() — the real bug is the chained Error","Null-check data set() in cell actions","Test cells in isolation before using them in templates","Run strict static analysis (phpstan/psalm) on cell classes"],"tags":["view","php","cells","template"],"backgroundTag":"internal-invariant-violation","analyzedSha":"1128eba9b09f1946df684811350e26f2cef68fac","analyzedAt":"2026-09-12T12:07:00.388Z","contentChangedAt":"2026-09-12T12:07:00.388Z","schemaVersion":2},"datasetVersion":"2026-09-15T23:17:13.987Z"}