You’re modifying setup and non-setup objects in the same transaction. Problem Explanation Salesforce separates setup objects (User, Profile) from standard objects to maintain system integrity. Root Cause(s) 1. Creating Users and Accounts together 2. Updating Permission Sets alongside data records 3.Read more
You’re modifying setup and non-setup objects in the same transaction.
Problem Explanation
Salesforce separates setup objects (User, Profile) from standard objects to maintain system integrity.
Root Cause(s)
1. Creating Users and Accounts together
2. Updating Permission Sets alongside data records
3. Test setup not isolated
Step-by-Step Solution
1. Move setup object DML to System.runAs()
2. Separate transactions using @testSetup
3. Use async Apex for one side if required
Edge Cases & Variations
1. Permission Set Assignments count as setup DML
2. Community Users increase complexity
Common Mistakes to Avoid
1. Creating users inside main test method
2. Ignoring setup vs non-setup distinction
Why does my custom WordPress theme fail after a PHP update?
Theme failures after PHP updates usually stem from deprecated or removed functions.Older code often assumes behavior that no longer exists in newer PHP versions. Error logs will usually point to the exact function causing the failure. Updating syntax and replacing deprecated calls resolves most issuRead more
Theme failures after PHP updates usually stem from deprecated or removed functions.
Older code often assumes behavior that no longer exists in newer PHP versions. Error logs will usually point to the exact function causing the failure. Updating syntax and replacing deprecated calls resolves most issues.
Strict typing and warnings introduced in newer PHP versions can also expose hidden bugs. The key mistake is postponing PHP compatibility testing.
See lessThe takeaway is to keep themes aligned with supported PHP versions.
How do I resolve “jQuery is not defined” errors in WordPress?
This error usually happens when scripts load before jQuery or when jQuery is deregistered.Themes or optimization plugins often cause this unintentionally. Ensure scripts declare jQuery as a dependency and load in the correct order. Avoid loading custom scripts in the header unless necessary. No-confRead more
This error usually happens when scripts load before jQuery or when jQuery is deregistered.
Themes or optimization plugins often cause this unintentionally.
Ensure scripts declare jQuery as a dependency and load in the correct order. Avoid loading custom scripts in the header unless necessary.
No-conflict mode also requires using
jQueryinstead of$.A frequent mistake is manually including jQuery from external sources.
See lessThe takeaway is to rely on WordPress’s script loader for dependency management.
Why does WordPress show database connection errors intermittently?
Intermittent database errors usually indicate resource exhaustion or unstable connections.High traffic, slow queries, or limited database connections are common triggers. Check database server logs and monitor connection limits. Optimizing queries and reducing plugin load often stabilizes connectionRead more
Intermittent database errors usually indicate resource exhaustion or unstable connections.
High traffic, slow queries, or limited database connections are common triggers.
Check database server logs and monitor connection limits. Optimizing queries and reducing plugin load often stabilizes connections.
Hosting-level issues, especially on shared environments, can also cause this behavior.
The mistake is focusing only on credentials instead of performance.
See lessThe takeaway is that database reliability depends on both configuration and workload.
How do I identify which plugin causes random WordPress crashes?
Random crashes usually indicate race conditions, memory leaks, or intermittent API failures.Plugins that hook into cron jobs or background tasks are common suspects. Enable logging and check timestamps around crashes. Deactivate plugins in batches to narrow down the cause. Monitoring memory usage caRead more
Random crashes usually indicate race conditions, memory leaks, or intermittent API failures.
Plugins that hook into cron jobs or background tasks are common suspects.
Enable logging and check timestamps around crashes. Deactivate plugins in batches to narrow down the cause.
Monitoring memory usage can also reveal problematic plugins.
A common mistake is blaming hosting immediately.
See lessThe takeaway is systematic isolation beats guesswork.
How do I troubleshoot WordPress showing blank pages only for logged-in users?
Blank pages for logged-in users usually indicate role-based logic failures.Plugins often load extra features for authenticated users that trigger errors. Check error logs while logged in and disable plugins affecting user roles or dashboards. JavaScript errors in admin bars are also common causes. CRead more
Blank pages for logged-in users usually indicate role-based logic failures.
Plugins often load extra features for authenticated users that trigger errors.
Check error logs while logged in and disable plugins affecting user roles or dashboards. JavaScript errors in admin bars are also common causes.
Caching logged-in users can exacerbate the issue.The common mistake is testing only as a guest user.
See lessThe takeaway is to always test WordPress behavior across user roles.
Why does WordPress media upload fail with “HTTP error”?
The generic “HTTP error” during uploads usually hides server-side restrictions.It often results from low PHP memory limits, file size restrictions, or image processing failures. Check PHP settings like upload_max_filesize, post_max_size, and memory_limit. Image libraries such as GD or Imagick can alRead more
The generic “HTTP error” during uploads usually hides server-side restrictions.
It often results from low PHP memory limits, file size restrictions, or image processing failures.
Check PHP settings like
upload_max_filesize,post_max_size, andmemory_limit. Image libraries such as GD or Imagick can also cause failures if misconfigured.Testing with a smaller file helps confirm whether size is the issue.
The common mistake is troubleshooting only within WordPress without checking server limits.
See lessThe takeaway is that media uploads are tightly coupled with PHP and server configuration.
Why does my WordPress site show a white screen after activating a plugin?
A white screen right after activating a plugin almost always means a fatal PHP error is occurring before WordPress can render anything.This typically happens when the plugin is incompatible with your PHP version, conflicts with another plugin, or calls a function that no longer exists. The fastest wRead more
A white screen right after activating a plugin almost always means a fatal PHP error is occurring before WordPress can render anything.
This typically happens when the plugin is incompatible with your PHP version, conflicts with another plugin, or calls a function that no longer exists.
The fastest way to confirm this is to enable error logging by adding
define('WP_DEBUG', true);anddefine('WP_DEBUG_LOG', true);inwp-config.php. Reload the page and checkwp-content/debug.log. You’ll usually see the exact file and line causing the crash.Once you know the source, deactivate the plugin via FTP or file manager by renaming its folder. If the error mentions PHP 8.x issues, downgrading PHP temporarily or updating the plugin often resolves it. In some cases, replacing deprecated functions manually can be a short-term fix.
A common mistake is assuming the theme is at fault when the timing clearly points to the plugin activation.
See lessThe practical takeaway is to always check PHP compatibility before activating plugins on production sites.