mcp-server-semgrep/semgrep-rules/python/django/performance/access-foreign-keys.yaml

MCP Server for Semgrep Integration - static code analysis with AI

rules:
  - id: access-foreign-keys
    patterns:
      - pattern-either:
          - pattern-inside: |
              from django.$Y import $Z
              ...
          - pattern-inside: |
              import django
              ...
      - pattern: $X.user.id
      - pattern-not: request.user.id
      - pattern-not: self.request.user.id
    message: You should use ITEM.user_id rather than ITEM.user.id to prevent running an extra query.
    languages: [python]
    severity: WARNING
    metadata:
      category: performance
      technology:
        - django
      references:
       - https://docs.djangoproject.com/en/5.0/topics/db/optimization/#use-foreign-key-values-directly