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Last active April 4, 2024 18:17
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second_attempt.md

Debugging ActionController::InvalidAuthenticityToken Error

  • Error Overview:

    • Encountered during image upload in a Rails application. Rails fails to verify CSRF token authenticity.

  • Debugging Steps:

    1. CSRF Token Presence: Check for correct placement of <%= csrf_meta_tags %> in the application layout head.

    2. Form Method Matching: Ensure the form's method (:post vs. :patch) matches the expected action's HTTP verb.

    3. Nested Forms Check: HTML does not support nested forms. Confirm the partial is not rendered inside another form.

    4. AJAX Requests: For AJAX-based submissions, verify that the CSRF token is included in request headers.

    5. Middleware Inspection: Review the middleware order in config/application.rb, particularly custom middleware like OrganizationMiddleware, for potential interference with CSRF token handling.

    6. Logging for Inspection: Add temporary logging in the relevant controller and middleware to inspect the passed authenticity_token.

    7. Rails Version: Make sure your Rails version is up to date to benefit from the latest CSRF handling improvements.

Implementing these steps should help in identifying and resolving the ActionController::InvalidAuthenticityToken error.

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