Wheels Debugging

This error occurs when mixing positional and named arguments in Wheels function calls. Review your controller or model code for functions using both styles—convert all arguments to named format. Enable debug output via `set(showDebugInformation=true)` in config/settings.cfm to see exact argument positions and values.

This casting error typically happens when a query result is passed where an array is expected, often in validation rules or model associations. Check that your database queries return the correct data type, and verify validation rule definitions match their input format using `cfdump` to inspect variable types.

renderPage renders a complete layout; renderView renders only a view partial without layout. Use renderView for AJAX requests and component reloads, renderPage for full page responses. Enable Wheels debug output to trace which render method is executing and confirm layout inclusion.

These errors signal incorrect model associations or missing database columns. Verify column names match exactly in your migration files and model relationship definitions. Inspect the generated SQL using debug output, then check your database schema directly with database tools to confirm the structure exists.

Yes, Wheels debugging integrates with browser MCP tools like Puppeteer and Playwright to automate UI testing and form submission verification. Use these tools to capture screenshots, inspect DOM elements, and verify that views render correctly without manual browser steps.

Generic errors appear when debug settings are disabled. Enable detailed error output by setting `showErrorInformation=true` and `showDebugInformation=true` in config/settings.cfm. This exposes stack traces, variable inspection, and SQL queries to pinpoint root causes quickly.