mcp-server-semgrep/semgrep-rules/python/django/maintainability/duplicate-path-assignment.yaml

MCP Server for Semgrep Integration - static code analysis with AI

rules:
  - id: duplicate-path-assignment
    languages:
      - python
    message: path for `$URL` is uselessly assigned twice
    metadata:
      category: maintainability
      technology:
        - django
      references:
        - https://docs.djangoproject.com/en/3.2/topics/http/urls/#naming-url-patterns
    patterns:
      - pattern: |
          [..., django.urls.path('$URL', $VIEW, ...), ..., django.urls.path('$URL', $VIEW, ...), ...]
    severity: WARNING
  - id: conflicting-path-assignment
    languages:
      - python
    message: >-
      The path for `$URL` is assigned once to view `$VIEW` and once to `$DIFFERENT_VIEW`, which can lead to unexpected behavior.
      Verify what the intended target view is and delete the other route.
    metadata:
      category: maintainability
      technology:
        - django
      references:
        - https://docs.djangoproject.com/en/3.2/topics/http/urls/#naming-url-patterns
    patterns:
      - pattern: |
          [..., django.urls.path('$URL', $VIEW, ...), ..., django.urls.path('$URL', $DIFFERENT_VIEW, ...), ...]
      - pattern-not: |
          [..., django.urls.path('$URL', $VIEW, ...), ..., django.urls.path('$URL', $VIEW, ...), ...]
    severity: ERROR
  - id: duplicate-path-assignment-different-names
    languages:
      - python
    message: path for `$URL` is assigned twice with different names
    metadata:
      category: maintainability
      technology:
        - django
      references:
        - https://docs.djangoproject.com/en/3.2/topics/http/urls/#naming-url-patterns
    patterns:
      - pattern: |
          [..., django.urls.path('$URL', $VIEW, name='$NAME', ...), ..., django.urls.path('$URL', $VIEW, name='$OTHER_NAME', ...), ...]
      - pattern-not: |
          [..., django.urls.path('$URL', $VIEW, name='$NAME', ...), ..., django.urls.path('$URL', $VIEW, name='$NAME', ...), ...]
    severity: WARNING
  - id: duplicate-name-assignment
    languages:
      - python
    message: >-
      The name `$NAME` is used for both `$URL` and `$OTHER_URL`, which can lead to unexpected behavior when using URL reversing.
      Pick a unique name for each path.
    metadata:
      category: maintainability
      technology:
        - django
      references:
        - https://docs.djangoproject.com/en/3.2/topics/http/urls/#naming-url-patterns
    patterns:
      - pattern: |
          [..., django.urls.path('$URL', $VIEW, name='$NAME', ...), ..., django.urls.path('$OTHER_URL', $OTHER_VIEW, name='$NAME', ...), ...]
      - pattern-not: |
          [..., django.urls.path('$URL', $VIEW, name='$NAME', ...), ..., django.urls.path('$URL', $VIEW, name='$NAME', ...), ...]
      - pattern-not: |
          [..., django.urls.path('$URL', $VIEW, name='$NAME', ...), ..., django.urls.path('$URL', $OTHER_VIEW, name='$NAME', ...), ...]
      - pattern-not: |
          [..., django.urls.path('$URL', $VIEW, name='$NAME', ...), ..., django.urls.path('$OTHER_URL', $VIEW, name='$NAME', ...), ...]
    severity: ERROR